BUILD A SIMPLE FM TRANSMITTER! Radio NOVEMBER 1991 ECHNOLOGY - VIDEO - STEREO - COMPUTERS - SERVICE UYER'S GUIDE O DSO'S round-up of ddFM IUSIC ON HOLD your telephone "roubleshoot icroprocessor ircuits with our 1ICR0 MONITOR 1 • i EMM ~« 1 1 I ■ * a a 4 „ . » „ ........ ut , . 2 J 3 3> "■" I P ■ B w . o n ( , ri « op ALOG SCOPES: New features make them more versatile than ever! Build our 874x PROGRAMMER ■ ■ i ___ » i_ microcontrollers GERHSBACK xxxxxxxx CAR-RT SORT XX CRD3 75D456HRR5165MD93 11 G4 NOU 93 RB x FLUKE AND PHILIPS - THE GLOBAL ALLIANCE IN TEST & MEASUREMENT 7 SERIES II 8 New Meters. 8 Old-Fashioned Values. Introducing Fluke's 70 Series II, next- generation multimeters that meet the increasing demands of your job and your budget. Consider. At the top of the line, the new Fluke 79 and 29 deliver more high-performance features - capacitance, frequency, a fast 63- segment bar graph, Lo-Ohms range. Smooth- ing™, faster ranges - than DMfvls costing much more. At the entry level, the new model 70, Fluke's lowest-priced DMM ever, delivers unparalleled Fluke quality at a price comparable to "dispos- able" meters. And in between are all the models that have made the 70 Series the most popular DMM family in the world - updated, refined and delivering even more value than ever. "BASICS" REDEFINED No matter which 70 Series II you choose, you get simple, one-handed operation. High resolution. And built-in, go anywhere reliability. Automatic Touch Hold® - standard on every model - locks the reading on the display and signals you with a beep, automatically updating for each new measurement without a reset, Leaving you free to concentrate on your work, not on your meter. YOUR BEST CHOICE Best of all, every 70 Series II is a Fluke, backed by a worldwide service network and an industry- leading 3 year warranty. So the next time you're in the market for a new meter, ask for the one that guarantees old- fashioned value. Fluke 70 Series II. For more information call 1-S00-6789-LIT. Orcall 1-800-44-FLUKE, ext 33 for the name of your nearest Fluke distributor. CIRCLE 121 ON FREE INFORMATION CARD Fluke 73 Series II & 29 Series II $185- 1000 Count Digital Display (9999 in H; 3 He ) 63 segment Analog Bar Graph 0.3% Basic DC Vollage Accufacy Automatic Toucti Hold 1 J cd? ks: Ajc;i1> L::r. r.: 'y Beepr Arranging, Manual Ranging Hotsler with Flex Slant!" Frequency Counter to over 20 kHz Capacitance 10 pF to 99Q%jF lo-Ohms Range with Zen Calibration Smoothing Tl 700 Hours Battery Lite (atkaline) 3 year Warranty 79/77/75/73/70 lor measurement to 4900 V-A. 29/23/31 lor hirjhet energy muswcmen is "Fluke 70 Series I* suggested U.S iis: ::.f ces ra^ge 'rom $69 lo S165 John Fluke Mlg. Co.. Ire. P.O. EOlSOSOWS 250E EvsrHtWA8!2aS U.S : 206-35MWO Cihiia 416-690-7650 O:tie ne S Ajrrp Itl.J&lfjtSvJXff 1 Amp) >-1.23t3-HrVDCeS*TT¥ M ,S to -1 WDC 9 l AnUJ • *lJVK*f 1 Amp ♦ -12VDC«i Afnp ■ .5VDCC 1Amp i S9VA0 CrMilir tapped rj 1 SvaC UTAfip ANALOG - SECTION ■ Fwwfceo G*n*rater &n*. Trajngubr. Squar* wiim tonr* * Fraqu«nCy adfLttfit* it !*• rfcnjr)** hornTtolKKHZ i fill llipwm ■|la1 •QCtiflM I MOOulKion FU-W DIGITAL- SECTION * Enjnttfalarwilcriti ■ Tws ns> gqkjxm t-jt? iv.Mrws * Elgtit LED rawXwrla TO, buttarod 'CaxklrKKHncr * to 100KHZ * Clock imp'tudo 5VPJ" Sqi. arn watt BHEADBOAflDS > 2 B''i adt»3 rdi aacA cenj-n W0 i* |»«l tic-l ! .E8SI a » ■ « ■ 4'i \ [l ill 1 1 1 1 1 * * ! | - aaB- 1 C & S SALES INC. m 1245 RoMrmmd. IK-trlkld. II. MHII5 l — = tSIKh2 l )2-771l 1708)541-0710 [h4ai1*rCE 15 Day Money Back Guarantee 2 Year Warranty Prim subject to chanBo WRITE FOR FREE CATALOG § 03 m J3 CIRCLE 109 ON FREE INFORMATION CARD 23 NEW PRODUCTS o z o tr I UJ _i LU 6 < DC ALL-FORMAT VCR ANA- LYZER. A companion to Sencore's VA62A Univer- sal Video Analyzer, the VC93 All Format VCR Ana- lyzer is designed to isolate all video, audio, and servo problems in the playback and record circuits of VCFTs and camcorders. Together, the two instru- ments completely analyze VCR's from antenna to line output. The VC93's servo tests allow the user to au- tomatically check out a VCR without removing the VCR' cover. Those tests eliminate the confusion of- whether a bad playback symptom is luminance or servo related, and isolate servo problems to the cap- stan or cylinder. Head-sub- stitution signals positively isolate video-head defects CIRCLE 16 ON FREE INFORMATION CARD from other circuit prob- lems. Phase- and chroma- locked drive signals trou- bleshoot all VCR stages from the heads to the out- puts; and the VC93 even troubleshoots deFects in stereo hi-fi audio circuits, it supports VHS, Super VHS.VHS-C, Super VHS- C, Beta, Super Beta, 8mm, Hi-8, U-Matic. and U-Matic SP VCR and camcorder formats. The VC93 all-format VCR analyzer costs $2995— Sencore, Inc., 3200 Sencore Drive, Sioux Falls, SD 57107; Phone: 1-800-SENCORE. LAN-GRADE SURGE PRO- TECTOR. Harsh local area network CLAN) environ- ments demand surge and EMI/RFI noise sup- pressors to protect the high-performance hard- ware and high-speed data communications links. The CIRCLE 17 ON FREE INFORMATION CARD LAN Pro S20LP from Proxima supplies such pro- tection by eliminating high- frequency noise and high- energy surges and spikes. A special filter removes 99% of all EMI/RFI noise from 500 kHz to 100 MHz, which is particularly impor- tant for LAN communica- tions that run between 2.5 and 20-plus MHz. A "super high energy dissipation'," (SHED) circuit provides an energy dissipation ca- pability of 480 joules and can withstand three times the number of high-energy (IEEE 587 1980 category- B) surges as ordinary com- puter-grade surge sup- pressors. The LAW Pro S20LP also features a po- larity/ground fault indica- tion for additional security, since LAN's are particularly vulnerable to ground faults. A Lifetime Equipment Pro- tection Policy guarantees the replacement or repair of any computer equip- ment that is damaged due to power transients while properly connected to the S20LP. The LAN Pro S20LP has a list price of $79.95 — Proxima Corporation, 6610 Nancy Ridge Drive, San Di- ego, CA 92121; Phone: 619-457-5500. POCKET-SIZED FREQUENCY COUNTER. According to Startek International, their model 3500 frequency counter is the smallest CIRCLE 18 ON FREE INFORMATION CARD available unit to offer the ability to find and measure frequencies from 10 Hz to 3.5 GHz. The 3.4x3.8 xl- inch instrument weighs about 9 ounces and fits in a shirt pocket. It features an 8-digit red LED readout, a display-hold function, a one-megohm input imped- ance from 10 Hz to 12 MHz, and a 50-ohm input imped- ance from 10 MHz to 3.5 GHz. The user has a choice of three gate times, provid- ing a maximum resolutions of 0.1 Hz (to 12 MHz) and 10 Hz (to 3.5 GHz). Internal Ni-Cd batteries provide three to five hours of porta- ble operation. With the supplied 110-VAC adapter/ charger, the 3500 can be used while recharging. It can also be powered by an optional 12-to-9-volts DC automobile adapter. Other options include various probes and antennas and a black-vinyl zipper case. The 3500 frequency counter costs $250. — Startek International Inc., 398 NE 38th Street, Fort Lauderdale, FL 33334; Phone:305-561-2211 (for orders only: 800-638- 8050); Fax: 305-561-9133. DUAL-WATTAGE SOLDER- ING STATION. Delivering professional results at a hobbyist price, Ungar's UTC SS soldering station is well suited for electronic- kit assembly and the repair of electronic devices. Its dual-wattage control allows the user to select the prop- er heat for the job: The low setting, 21 watts, heats to 650°Fand the high setting. 35-watts, heats to 850°F. A fully grounded tip ensures safe use with sensitive components on printed cir- 24 CIRCLE 19 ON FREE INFORMATION CARD curt boards, including sur- face-mount devices. The all-in-one unit includes a power base with built-in controller, a dual-wattage soldering iron with cool, anti-slip handle; and a coil- spring iron holderwith a ce- ramic mouthpiece that pro- vides a safe standby position for the hot iron. The UTC SS also features a conveniently located, contamination-free sponge that allows the user to maintain a clean, well-tin- ned tip. The unit comes with a general-purpose sol- dering tip, and can be used with 12 different standard- line, 'A-inch, thread-in tips from Ungar. An optional adapter (model WO) allows the use of a wide selection of Ungar's 1-8-inch tips. The UTC SS soldering station has a suggested list price below $60.— Ungar, Division of Eldon Indus- tries. Inc., 5620 Knott Ave- nue, Buena Park, CA 90621; Phone: 714-994-2510; Fax: 714-523-7790. CONTINUOUS-ROLL COM- PUTER PAPER. Anyone who's ever printed out a computer- generated "Happy Birthday" banner, only to have it tear along the perforations when try- ing to hang it up, will appre- ciate Banner Band continu- ous-roll computer paper from Micro Format. The pa - per, manufactured from high-grade 20-pound bond, has Vi-inch micro-perf mar- gins and no cross perfora- CIRCLE 20 ON FREE INFORMATION CARD tions. It is available in white and in assorted pastels and fluorescent colors, with borders or over-all designs (hot-air balloons and holi- day motifs), and in "Ban- nerBrite" parchment. It comes in two widths to ac- commodate both standard- and wide-carriage printers, and in 45- and 150-foot lengths. BannerBrite continuous- roll computer paper costs between $1 1 .95 and $19.95— Micro Format, Inc., 533 North Wolf Road, Wheeling, lL 60090; Phone: 1-800-333-0549 or 708-520-4699; Fax: 708-520-0197. VIDEO-AMPLIFIER TRAN- SISTOR ARRAY. Designed for use as an output device in very fast video-amplifier circuits, Motorola's CR820 transistor array consists of a complementary pair of sil- icon bipolar transistors connected as emitter fol- lowers. Their primary use will be in black and white CRT video monitors, with other applications where discrete steps of bright- ness are required. The ar- ray consists of a high- voltage, high-cutoff fre- quency NPN chip mounted along with a similar PNP chip in a common SOE- type package. Collector- base breakdown voltage is 120 volts for the NPN tran- sistor and -80 volts for the PNP Cutoff for each chip is typically 1 GHz. Junction-to-case thermal resistance is 20°C/W The CR820 costs $8.00 for quantities of 25 and up; samples and small quan- Train at HOME to be an Electronics Technician \ As the demand for computers and microprocessors in business, manufacturing and communications continues to grow, so does the need for qualified technicians. It's not unusual for experienced technicians to earn from $30,000 to more than $40,000 a year.* Now through Peoples College of Independent Studies you can train for this exciting field without interrupting your job or home life. From Five Programs of Study • Electronics & Microprocessor Technology • Industrial Electronics & Microprocessor Technology • Communications Electronics with Micro- processor Technology ■ Computer Servicing & Electronics Technology • Specialized Associate Degree In Electronics Technology Depending on the program you select, you'll perfect your skills using this advanced equipment, included in the price of tuition: •IBM-Compatible Personal Computer • Digital Multimeter • Digital Logic Probe • Elenco Oscilloscope • Portable Cellular Telephone r Source : US. Bureau 01 Ijbor SUMIbCS) Peoples College introduces some training firsts to make your learning experience more complete: • Accelerated Learning System — a scientifically proven study system [hat helps you learn faster and easier than ever before. • Video Tutor Training Tapes — give you a permanent, visual record of informative lectures and close-up demonstrations. • Experience Labs — professionally designed experiments that give you hands-on "bench" experience, • Industry Certification Training Guide — provided with four of our programs. Prepares you for examinations you may take for your professional license or certification. To help you get started on your education, Peoples College has reduced luition rates and offers low monthly payment plans with no finance fees. So don't delay, call or write for more information todav! -. COLOR CATALOG Mail Coupon Call TOLL FREE 1-800-765-7247 ■ Programs- ottered only in United States, Canada, Puerto Rko ■and' Virgin Islands. No Obligation, No sales person will calt. Our programs are accredited by the Accrediting Commission of the National Home Study Council 3< - YES! I would like to know more about your ' training programs. Send a catalog to: I Name , Address Oty State Zip 5 Phone # Peoples College OF INDEPENDENT STUDIES 233 Academy Drive • P.O. Box 421768 Kissimmee, FL 34742-1 768 Memb«, O.L. People* Croup R1191 m en m 31 — t 25 CIRCLE 184 ON FREE INFORMATION CARD CIRCLE 2t ON FREE INFORMATION CARD tities are available from stock— Motorola Semicon- ductor Products. Media Re- lations MD 56-102, P.O. Box 52073, Phoenix, AZ 85072. ACTIVE DIFFERENTIAL PROBE. The API SI-9000 differential probe comes out of the box ready to use. Its built-in, precision dif- ferential amplifier is infer- nally powered and requires no adjustment. The SI-9000 can be used in the lab, in the field, and for edu- cation; and for monitoring, testing, designing, and troubleshooting in such areas as balanced data- transmission lines, power converters, inverters, switching-mode power supplies, robotics, HVAC, machine/tool control, and controlled lighting sys- tems. The unit uses one in- put channel of any general- purpose oscilloscope. It has convenient switch-se- lectable gains, DC to 15 CIRCLE 22 ON FREE INFORMATION CARD MHz bandwidth, and a con- stant input impedance of 2 megohm and 2.5 pF The SI-9000 can be used with inputs as high as ± 700 volts and provides 2% ac- curacy for outputs as high as ±3.5 volts across loads as low as 1 kilohm. The Si-9000 active dif- ferential probe costs $399— Avex Probes Inc.. 1683 Winchester Road, Bensalem, PA 19020; Phone: 800-877-7623. PCXI COLOR VGA MONITOR. Rapid System's PX1490 is a 7.5-inch, VGA color monitor for the "PC Ex- tended for Industry" CPCXI) system. PCXI is a modular, industrial PC based on a 13-slot passive backplane. Each part of the PC is enclosed in a metal, shielded, cooled, modular enclosure. The PXU90 monitor, a Sony Trinitron with 0.26mm dot pitch and 720x480 maximum reso- CIRCLE 23 ON FREE INFORMATION CARD lution, is completely inte- grated into the PCXI chassis, connecting di- rectly to the PCXI video module. Depending on configuration, a complete system leaves two or three slots open. It can be used for rack-mount applica- tions requiring built-in, eye- level monitoring, in such fields as production test- ing, factory automation, process control, and data acquisition. The PX1490 monitor costs $1699— Rapid Sys- tems Inc., 433 North 34th Street, Seattle, WA 98103; Phone: 206-547-8311; Fax: 206-548-0322. R-E SIGNAL SL-1000 CATV CONVERTER The new SIGNAL SL-1000 comes complete with infrared remote control and features 86 Channel Capability. The SL-1000 comes standard with automatic fine-tuning with manual override on the remote control and it's capable of working on HRC or standard cable systems. The SL-1000 also features independent channel fine-tuning, channel scan up/down, fully programmable favorite channel memory with recall and also last channel recall. The new SL-1000 also comes with Parental Control and Sleep Timer. In addition to all these fine features the SIGN AL-10IK) comes with a one year warranty putting this converter in a class by itself. o w -1 6 < 26 Jwon «■*»»- ^SaHtULCww • Channel 2-3 Swltchable • Parental Control • 86 Channel Capacity • Sleep Timer • Manual Super Fine Lock Tuning • L.E.D. Channel Display • Favorite Channel Memory and Recall • Channel Scan • Last Channel Recall • Surge Protection • Infrared Remote Control . 550 MHz SIGNAL, INC. 10278 N.W. 47th Street . Sunrise, Florida 33351 • 305/748-7513 • Fax 305/749-6119 CIRCLE 196 ON FREE INFORMATION CARD A Shocking Offer! Now for the first time in CIE's 56 year history you do not have to be enrolled at CIE to receive our Electronics and Electricity Lesson Modules. Available for a limited time to non-students for the shockingly low introductory price of only $99.50. With CIE's patented AUTO- PROGRAMMED method of learning you'll quickly learn and then master the basics of electronics and electricity and then move on to ... soldering techniques, applications of Kirchhoff's law, voltage and power, printed circuit boards ... and much, much, more. Your commitment to CIE ends with your payment, but CIE's commitment to your success just begins when you receive your lessons, exams, binder and equipment. This special price includes the benefits CIE normally extends to its students and graduates ,-v< ' v ' ' ' You'll receive CIE Bookstore privileges, a pat- ented learning method, access to CIE's student, faculty and alumni electronic bulletin board and a free issue of CIE's school newspaper The Electron". 24-Hour grading and unlimited access to CIE's faculty is available on an optional basis. And best of all, when you decide to continue your electro- nics education in any of CIE's programs, you'll receive a $100.00 CIE tuition credit certificate. All this knowledge and sup- port will put you on the road to understanding digital electronics, microprocessing principles, computer systems, telecommuni- cations, and much, much, more. • Free Issue of "The Electron " • Build your personal burglar alarm • Theory and hands-on training lessons and exams covering "current and voltage" through "printed circuit boards" • CIE Bookstore privileges • Patent learning method • Electronic Bulletin Board privileges All This For Only! $AAso A $100.00 CIE TUITION CREDIT CERTIFICATE □ Yes, send me CIE's Introductory Electronic and Electricity Lessons and Equipment. Name: Street: Apt. #: _ City: _ State: Age: _ .Zip: Phone (_ IM3E BOOKSTORE 1776 East 17th Street Cleveland, Ohio 441 14 Total Merchandise: Ohio Residents add 7% Sales Tax: California Residents add 6 1 /2% Sales Tax: Total this order: S99.50 Shipping and Handling Charges: Method of Payment: Amount Enclosed: ~i Personal Check or Money Order 1 Master Card O Visa $5.00 Card Expiration Date: Signature: CHARGE BY PHONE! 9 AM to 4:30 PM Eastern Time; 1-300-321-2155 ext. 7311; In Ohio 1-800-523-9109 ext. 7311 z 9 CD m J} CD CO 27 NEW LIT Use The Free Information Card for fast response. TELEVISION AND VIDEO SYSTEMS: OPERATION, MAINTENANCE, TROU- BLESHOOTING, AND RE- PAIR; by Charles G. Bus- combe. Prentice Halt, En- glewood Cliffs, NJ 07632; $45.80. Television and Video Systems CIRCLE 40 ON FREE INFORMATION CARD The most popular cate- gory of consumer elec-, tronics is video — encom- passing televisions, monitors, projection TV's, and VCR's — so there are ever-expanding oppor- tunities in servicing such equipment. This book, in- tended as a training tool for tomorrow's technician's and a reference source for those working in the field today, explores all facets of modern electronic con- sumer product servicing. The book assumes a basic knowledge of elec- tronics on the part of the reader, and concentrates instead on theory and trou- bleshooting. Divided into sections by equipment cat- egory, each section con- tains a straightforward pre- sentation of theory, con- taining almost no engineer- ing concepts or mathe- matics, followed by de- tailed explanations of trou- bleshooting techniques, accompanied by block di- agrams, partial sche- matics, and other illustra- tions. At the end of each chapter are questions de- signed to make the reader ponder what has been taught, and to promote un- derstanding the material. Also included is a full sche- matic of a late- model color TV that serves as an exer- cise in schematic reading and circuit tracing. RADIO PRODUCTION: ART AND SCIENCE; by Michael C. Keith. Focal Press, 80 Morttvale Avenue, Stone- ham, MA 02180; $29.95. Taking a fully integrated approach to the subject of radio production, this book examines the effects of CIRCLE 39 ON FREE INFORMATION CARD station programming for- mats on the production process, with the belief that the two are insepara- ble. The first section of the book provides a brief histo- ry of radio production fol- lowed by a depiction of a to o z o or h- o HI _i LU 6 Q < 28 CABLE - TV TUNABLE NOTCH riLTCR§ FOR ELIMINATION OF SEVERE INTERFERENCE FOR "CENSORING" OF ADULT BROADCASTS I • 45dB AT CENTER FREQUENCY • 5dB AT 2 MHZ FROM CENTER *2dB INSERTION LOSS MODEL TUNES TO CHANNEL PRICE SHIPPING 23H 2 or 3 (or 6 meter ham) $30 NO SHIPPING OR CO.D. CHARGES 46FM 4, 5. or 6 (or any FM station) $30 713 7.8,9. 10, 11, 12. Of 13 $30 1417 14(A), 15(B), 16(C). Of 17(0) S30 1622 18(E). 19(F), 20(G), 21(H). or 22(1) $30 3 for $75-10 for $200 - Mix or Match 30 DAY MONEY BACK GUARANTEE (3 FILTER LIMIT) FAST DELIVERY CALL TOLL FREE FOR CO.D. OR SEND CHECK TO ORDER STAR CIRCUITS P.O. BOX 94917 US VEGAS, NV 89193 1-800-535-7827 Buy American Ask about quantity discounts Model Shown: ilG-SW-1 100 MHZ, SwilcSableXl-X10 $34 ; Complete range of monolithic & modular probes from 60MHz - 300 MHz. Available with read -out feature. ■ Compatible with ail oscilloscopes, r Complete accessory pack (as shown). [ Tek and HP users: try us and compare our high quality low cost probes! r Made in the U.S.A. Call for Free catalog 1-800-87-PROBE Attention All Oscilloscope Users Try API Probes FREE for 30 days. We ore so sure Ihat our probes will meet or exceed your performance requirements that we will send qualified buyers a sample for a 30 day evaluation. After 30 days, either keep ihe probe and we will bill you, or simply return it to us. It's that easy. Avex Probes Inc. 1683 Winchester Road - P. O. Box 1026 Bcnsalem, PA 19020 Phone 215-638-3300 - Fax 215-638-9108 CIRCLE 191 ON FREE INFORMATION CARD day in the life of a produc- tion director in a modern studio. The skills and qualities required to meet the responsibilities of the job are discussed. The sec- ond part of the book begins with an analysis of studio design characteristics, in- cluding size, layout, and acoustics, and evaluates the latest audio equipment, including MIDI, syn- thesizers, digital pro- cessors, and computers, in the context of their roles in the production studio. Part III covers the basics of copy preparation, good an- nouncer delivery, and the techniques used in tape editing. A dozen of radio's most popular formats are analyzed in Fart IV, along with a look at how the for- mat affects the way that commercials, features, promos, and public-service announcements are pro- duced. The book's final section takes a look at sev- eral aspects of the produc- tion experience in noncom- mercial formats. As a whole, the book is intend- ed to provide the reader with a taste of what work- ing in radio production is really like, along with an un- derstanding of how the equipment works and how programming influences the entire radio production process. INFRARED OPTOELEC- TRONICS 1991 PRODUCT SELECTION GUIDE; from Quality Technologies, 610 North Mary Avenue, Sun- nyvale, CA 94086; Phone: 800-LED-OPTO; free. ■W&. This 16-page booklet de- scribes a comprehensive line-up of infrared LED's and phototransistors. Packaging options include metal can, plastic T-34, T-1, T-1%, and a three-lead T-1- % phototransistor. User- friendly specifications pro- vide guaranteed min-max parameters. The book also includes two technical pa- pers for design engineers: "Testing Output Irradiance of Infrared LED's" and "Un- derstanding Light Sources When Measuring On-State Collector Current in Pho- totransistors." SOLDERING TOOLS FOR ELECTRONIC PRODUCTION; from Ungar, Division of El- don Industries, 5620 Knott Avenue, Buena Park, CA 90621; Phone: 714-994-2510; free. CIRCLE 38 ON FREE INFORMATION CARD CIRCLE 37 ON FREE INFORMATION CARD Ungar's updated lines of soldering and desoldering equipment and electronic production aids are de- scribed in this 25-page il- lustrated color catalog. Included are surface- mount rework systems, desoldering service cen- ters, soldering systems, soldering/desoldering irons, heat guns, and re- chargeable cordless tools. Highlighted is a new line of electronic manufacturing aids, including flushcut- ters, pliers, and other hand tools; masking devices; dispensers; thermal wire strippers; and assembly devices. The catalog pro- vides product descriptions, specifications, MIL-SPEC compliance, and selection guidelines. R-E METER For Fast, Accurate Measurement of Extremely Low Frequency^ Magnetic Fields Magnetic Fields in the 50 or 60 Hz ranges, generated by hundreds of sources in today's industrialized environment, are being looked at more and more as possible health hazards. The model 4060 provides instant measurement of thesefields, in milligauss or gauss, merely by flicking a switch. Designed for measuring both household and industrial sources. Priced under $180. Measures fields generated by: • Power Transmission Lines • Microwave Ovens • Televisions • Computers • ElectricMachinery • Dozens of other Sources NEW! from f- W. Bell ...the people WELL Request full data today! 61 20 Hanging Moss Road Orlando, FL 32807 ELF Hotline: 407-678-7308 CIRCLE 186 ON FREE INFORMATION CARD An ETCHED circuit hoard from a Printed PAGE in just 3 Hours The ER-4 PHOTO ETCH KIT gives you the tools, materials and chemicals to make your own printed circuit boards. The patented Pos-Neg'" process copies artwork from magazines like this one without damaging the page. Use the circuit patterns, tapes and drafting film to make your own 1X artwork. Or try the Direct Etch™ system (also included), to make single circuit boards without artwork. The ER-4 is stocked by many electronic distributors, or order direct. Add $3.50 for handling and shipping. ER-4 PHOTO ETCH KIT(NV and CA residents add sales tax) S 38.00 DATAK'S COMPLETE CATALOG lists hundreds of printed circuit products and art patterns. Also contains dry transfer letter sheets and electronic title sets for professional looking control panels. WRITE FOR IT NOW! DATAK Corporation • 55 Freeport Blvd. • Sparks, NV 89431 29 SM (1) NEW! "Shirt Pocket" Multimeter. Take it along! Features LCD display, autoranging with manual override, continuity sounder. Mea- sures to 400 volts AC/DC and resistance. With fold-up vinyl case, manual and replaceable batteries. #22-169 27.95 (2) NEW! Building Power Supplies. Easy-to- understand, 96-page book explains linear and switching supplies. Includes complete plans for building five useful supplies with Radio Shack parts. #276-5025 , 4.95 (3) Mini Audio Amplifier, Great for computer voice/music synthesis, signal tracing and more. Has a built-in speaker, Vb" headphone jack, W input jack and volume control, Put one on your bench today! #277-100B 11.95 (4} Digital Logic Probe. LEDs and tone outputs reveal logic states instantly. It's the fast way to check operation and pinpoint problems in all types of digital circuits. #22-303 16.95 W O Z o DC r- O LLI g o < rx 30 Parts Special -Order Hotline. Your local Radio Shack store stocks over 1000 popu- lar electronic components. Plus, we can special-order over 10,000 items from our warehouse — linear and digital ICs, tran- sistors and diodes, vacuum tubes, crys- tals, phono cartridges and styli, even SAMS" service manuals. Your order is sent directly to your Radio Shack store and we notify you when it arrives. Delivery time for most items is one week and there are no postage charges or minimum order requirements. (1) Shielded RS-232 Jumper Box. Top- quality inline D-sub 25 adapter. Wire the included jumper wires and board to suit your need. #276-1403 9.9S (2) Computer RS-232 Tester. Dual- color LEDs monitor seven data/control lines to help you spot problems quickly. D- sub 25. Connects inline. #276-1401 14.95 (3) Grounded-TIp Soldering Iron. 15W. #64-2051 7.49 (4) Vacuum-Type Desoldering Tool. #64-2120 6.9S (5) Locking Forceps. 6" long. Stainless. #64-1866 4.95 (6) Rosin Soldering Paste Flux. 1 oz. #64-021 1.79 (7) Lead-Free Solder. 96% tin, 4% sil- ver. 0,25 oz. #64-025 1.99 (B) 10-Amp Microwave Oven Fuses. #270-1256 Pkg. of 2/1.29 (9) 2- Amp Fast- Acting Fuses. #270-1275 Pkg. of 3/79C (10) 5-Amp "Blade" Vehicle Fuses, #270-1205 Pkg. of 2/B9S Computer/ Printer/Business Machine AC Power Cords, 6 feet long, (11) Extension. Just plug into lengthen existing cord. #278-1259 4,99 (12) With Space-Saving 90" CEE Con- nector. #278-1260 5,39 (13) With Straight CEE Connector. #275-1257 3.99 Since 1921 Radio Shack has been the place to obtain up-to-date electronic parts as well as quality tools, test equipment and accessories at low prices. Our 7000 locations are ready to serve you— NOBODY COMPARES Prces app'y i\ participating Radio Shack stores and dealers. Radio Shack is a division or Tandy Corporation CIRCLE 78 ON FREE INFORMATION CARD (1) Voltage Regulator ICs. Feature built-in overload protection and ther- mal shutdown. Great for custom pro- jects. Maximum input: 35VDC. 7805. SV. #276-1770 1.19 7812. 12V. #276-1771 1.19 (2) Low-Voltage Motor. Just the thing for science projects, robotics and solar power demos. Operates from t'fe to 3VDC. About 1 'fe" long. #273-223 99S (3) High-Speed 12VDC Motor. Up to 15,200 RPM, no load. About 2" long. #273-255 2.99 (4) "Ding-Dong" Chime. This IC and mini-speaker combo is ideal for a customer-entry alert or doorbell. Pro- duces 80 dB sound pressure at 12VDC. Operates from 6 to 18VDC. #273-071 8.99 (5) Surface-Mount Resistors. 200- piece assortment of 15 popular values. Rated '/s watt, 5%. #271-313 Set 4.99 (6) Metal Project Cabinet. An attrac- tive, easy -to- drill housing at a low price. 3 x 5V-4 x 5 7 /b" #270-253 . 6.79 (7) Power Supply Project Case. Vented 2Vz x 4=/ B x 3'/a" molded case. #270-287 3.99 (8) to 15 DC Voltmeter. Quality jew- eled movement. #270-1754 7.95 (9) Box/Board Combo. Molded en- closure plus predrilled 2x 3Va" board, labels and more. #270-291 4.99 (10) Eight-Position Audio Phono Jack Board. #274-370 .... 1.69 (11) 1:1 Audio Transformer. Z: 600- 900O. #273-1374 3.59 {12} Three-Pin XLR Mike Plug. Metal body #274-010 2.99 (13) Three-Pin XLR Inline Socket. #274-011 2-99 (14) Three-Pin XLR Panel Socket. #274-013 3.69 „ Radio /hack AMERICA'* A BUYER'S GUIDE TD: Digital Storage Oscilloscopes IF YOU'VE EVER USED A DIGITAL STORAGE OS- cllloscope (DSO), you know what an invaluable tool it can be. DSO's are designed specifically to receive, store, and process a variety of signals, including one-shot events, pre- trigger actions and various fast- or low-frequency signals that would normally escape detection by ordinary analog scopes. Unlike analog storage os- cilloscopes. DSO's can store transients as well as repetitive waveforms permanently in digital memory for later viewing or record keeping. DSO's are unsurpassed In their ability to rec- ord characteristic waveforms for individual anal- ysis or for comparison with other waveforms at a later time. Binary data captured in a DSO's mem- ory can be transmitted to a central computer, sent to an X-Y recorder for hard copies, or perma- nently stored on tape or disc. We will begin with some basics on how a DSO operates, then well discuss resolution, accuracy, bandwidth and risetime considerations as well as some specialized features which have made DSO's so popular. After laying out the ground- work on critical DSO characteristics, we'll give you a round up of some units ranging in price from about $1700 all the way up to $9900! Digital bandwidth One of the most important operating speci fications of a DSO is its maximum sampling rate. The sampling rate of a DSO is usually specified in megasam- ples per second (Ms/s). The quality of a displayed waveform depends on the number of dots, or samples, that are taken for each cycle. With a high number of samples for each cycle, the waveform will be displayed in great de- tail. When fewer samples are taken, important details may be lost. Digital bandwidth can best be illus- trated with a simple example. If a rela- tively low input signal of 500 kHz is displayed on a DSO t that can sample at a rate of 50 Ms/s, the number of* samples that are taken during one cycle can be found by dividing the signal frequency into the scope's sampling rate. Therefore, the number of samples equals Our in-depth approach to understanding digital storage oscilloscopes will shed new light on these sophisticated test instruments. STAN PRENTISS 50Ms/S-500kHz = 100. One cycle of the displayed 500- kHz signal is made up of 100 dots. That sampling rate may be fine for lower frequencies, but if you have a much higher frequen- cy of 10 MHz, the sampling rate reduces to only 5 dots per cycle, which will not give a clear picture of the actual waveform. When a signal is sampled less often than it should be, a phe- nomenon known as aliasing oc- curs. An under-sampled signal, and the resulting aliased signal is shown in Fig. 1-a and -b, re- spectively To avoid aliasing error, more samples per second must be taken. According to the Nyquist crite- rion, to completely reconstruct a waveform, sampling must occur at a frequency greater than twice the rate of the highest frequency for ordinary information, and often greater than 10 times for rise and fall time measurements. The requirement for a high sam- pling rate means that the analog- to-digital converter (ADC) must have a fast conversion rate. That usually requires an expensive flash converter, or a less expen- sive analog storage device, both of which we will discuss further. A commonly used "figure of merit" is the useful storage band- width (USB). The USB describes the maximum signal frequency a DSO can store, and is dependent on the sampling rate and the type of display used. The USB can be calculated as the (maximum sampling rate)/25, and is the up- per-frequency limit that the DSO can adequately reproduce. That frequency limit, however, can be extended by using different inter- SAMPLE ' POINTS O y ID 6 D < DC FIG. 1— AN ALIASED SIGNAL; an input signal with a low sampling frequency (a), and the resulting aliased signal (b). FIG. 2— INTERPOLATION METHODS; a dot display (a) has no interpolation, a lin- ear interpolator connects the dots with vectors (h), and sine interpolation (c). polation methods. Interpolation is essentially the DSO's ability to "connect-the-dots," smoothing the image into a fairly continu- ous waveshape. A dot display (Fig. 2-a) is useful as long as you have enough dots to reconstruct the waveform. Generally, about 25 points per cy- cle must be sampled for an ade- quate display. Therefore, for a full-scale sinusoidal display, the USB is equal to maximum sampling rate (Ms/s)/25. Linear interpolation (Fig. 2-b), or vector display uses a vector generator to draw lines between the data points on the screen. When that type of interpolation is used to display a sine wave, only 10 lines per cycle are needed to reconstruct the waveform. The USB for a linear interpolator is therefore (Ms/s)/10. Sine interpolation (Fig. 2-c) can even further extend the USB by introducing a sinusoidal func- tion between the dots. Only 2.5 points per cycle are needed to dis- play a signal. The USB of a sine interpolator is (Ms/s)/2.5. Not all measurements involve sine waves. When dealing with pulse waves, it is the rise time that determines the scopes abil- ity to display such waveforms, as we'll now see. Rise time One of the most important pa- rameters involved in reproducing pulse waveforms is the rise time (T r ). In analog oscilloscopes, the rise time can be calculated simply by the equation T r (ns) = 0.35/bandwidth (MHz), A 100-MHz scope, for instance, would have a rise time of 0,35/100 X10 6 = 3.5x10" 9 =3.5 ns. With digital scopes, however, minimum instrument T r varies between 0.8 to 1.6 of the sample intervals. If you measure between 10% and 90% of the pulse ampli- tude, the maximum possible rise time is T, = 0.8x2(sampte interval) T r = 1.6/( sampling rate). Because the most limiting measurement errors occur when a 1.6 sample interval is used, the useful rise time (UT r ) can be de- ined as UT r = 1.6/( sampling rate)or UT r = (minimum sample interval) x 1,6. So in a worst case situation where digitizing rates were 100 Ms/s, the minimum sample inter- val would become 0.01 jxs and TrDso^oix 1-6= 16 ns. r*8H SAMPLE INTERVAL SAMPLES K-1.6-H SAMPLE INTERVALS • • • • b SAMPLES FIG. 3— RISE TIME IS AN IMPORTANT pa- rameter in recording pulses. Errors in rise time made by a DSO depend on sample placement. The displayed signal can vary from 0,6 (a) to 1,6 (b) sample intervals. 32 HITACHI PRESENTS EIGHT MODELS of DSO's with attractive specifications, some even have four inputs. That calculation is based on pulses, not on dots, which are said to have further error condi- tions, and sine waves may appear faster than the actual input sig- nals due to induced preshoots and overshoots resulting from a small number of input samples. In Fig. 3-a, the step is exactly between two sample intervals, with a rise time of the resulting display of 0.8 x (sample interval). While viewing the same signal in Fig. 3-b, a sample acquisition is taken in the middle of the step. This is the worst case where the rise time shown in the display is equal to 1.6 x (sample interval). The real-time resolution be- tween samples can also be calcu- lated easily by dividing the sampling rate by 10 and then tak- ing the reciprocal of that value. Res; = 100(Ms/s)/tO=lOMHz 1/10 MHz = 100 ns As a practical example, a 100- Ms/s scope would sample every 10 nanoseconds [Vioqfx 10 6 ). Faster sampling would require a higher input-amplifier frequency re- sponse. A 500-Ms/s instrument would need a rise time of 1. 17 ns since it samples every 2 ns. Be aware of such parameters at all times when undertaking rise time and glitch measurements since bandwidth limitations cause both amplitude and sam- ple timing errors. Unlike an ana- log scope, you cannot use the useful rise time to work back and calculate the rise time of the orig- inal pulse, UT r is a measure of the upper limits of performance of a DSO. Now that we've covered some critical aspects of DSO bandwith and rise time, let's look a little deeper into the process of wave- form digitization. Digitizing basics The primary difference be- tween DSO's and analog storage scopes is their method of storing waveforms. DSO's digitize wave- form data, which is then stored in digital memory, while analog storage scopes store waveforms in the CRT by either bistable or mesh storage techniques. There are three stages involved in digitizing; sampling, quantiz- is usually specified in megasam- ples per second (Ms/s), or points per second, as we mentioned ear- lier. This digitizing normally oc- curs in the more modesdy priced DSO's with an 8-blt (2 s ) convert- er producing 256 voltage levels. The digitized samples are then stored in memory, and converted back to analog form using a dig- ital-to-analog converter (DAC). A block diagram of a DSO is shown in Fig. 4. Sampling DSO's use two types of sam- pling techniques — real time {or one-shot) and equivalent time sampling. Random events, or one-shots, are every-day phe- KIKUSUI MODEL 5040 is a 400-MHz, 25- Ms/s dual-channel scope with 1K per channel of memory storage. ing, storage, and readout. Sam- pling obtains a value of an input signal at specific points in time. Quantizing uses analog-to-dig- ital conversion to transform the sampled values into binary num- bers for storage. The digitizing rate is determined by the time base, which is a very precise dig- ital clock. The time base provides discrete points in time to refer- ence the quantized values of the input signal. The digitizing rate HEWLETT PACKARD'S SPECIAL— a dual channel, large screen digital (only) 5451 A scope that digitizes 2 channels at 1 gigasample per second (Gs/s) with 8-bit vertical resolution. ADDRESS BUS t VERT/H0RIZ REAL-TIME/ MEMORY CHANNEL SWITCHES VERTICAL DEFLECTION AMPLIFIER HORIZONTAL D/A CONVERTER CRT HORIZONTAL DEFLECTION AMPLIFIER VERT/HORIZ REAL-TIMlV MEMORY CHANNEL SWITCHES! REAL-TIME RAMP SIGNAL O < m S □o ■■■■■. FIG. 4 — BLOCK DIAGRAM OF A DSO. The input signal is digitized by an A'D converter and 3 stored in memory in digital form. To view the waveform on the CRT the data from memory 5 is reconstructed in analog form using a D/A converter. 2 33 CO o o LU ONE cycle imjuiriAnnnnnnnnni, t 1st CYCLE 2nd CYCLE 3rd CYCLE nth CYCLE J u n_ _n_ n_ -Mr t -* t -» t j J n V. n IrH PASS n nth n » t 1st CYCLE 2nd CYCLE 3rd CYCLE nth n n n n r n n n n _n n n n n □ □ a»t FIG. 5— SAMPLING TECHNIQUES of a DSO In real time(a) and equivalent times ( b-d): sequential sampling (6) samples one point ot the waveform or every cycle, random sampling (c) takes signals in a random sequence. Pre- and post-trigger- ing capabilities are retained with random sampling. Multiple point random sam- pling (d) takes several points of a wave- form in one cycle, thereby reducing acquisition considerably. nomena occurring naturally un- der almost every conceivable circumstance. Repetitive or re- V i SAMPLING k k k k k k,' PULSE V i • RECONSTRUCTED * -_^. 1 WAVEFORM FIG. 6— A RECONSTRUCTED WAVEFORM is shown from an input signal that has been sequentially sampled. cttrrent events are usually man- made and may be sampled at some part of the information dur- ing each cycle. Therefore, sample rates for a one-shot event must be comparatively faster than those for repeated waveforms in se- quence. Consequently, any DSO capable of repetitive sampling can accumulate and digitize con- siderably more high speed intel- ligence than one designed solely for one-shots, also called real time. In real-time sampling, all sam- ples for a signal are taken during a single pass. When a transient event occurs, such as a mechan- ical failure/shock, power-supply surge, or a biophysical response, it is usually short-lived and may not be repeated. A transient event must be captured while oc- curring, and sampled sequen- tially, from start to finish in one single sweep by real-time sam- pling. Figure 5-a shows how real- time sampling is used to recon- struct a sloping rectangular wave in a single cycle. Equivalent-time sampling con- structs a picture of a waveform by capturing a small bit of informa- tion from each signal repetition. That type of sampling is useful only for capturing repetitive sig- nals. There are two types of equivalent-time sampling; se- quential and random sampling. Figure 5-b shows how sequential sampling takes one point of the waveform for every cycle. That process is repeated sequentially until the digital memory is filled. A reconstructed waveform using sequential sampling is shown in Fig. 6. In addition to real time and re- petitive events for DSO display, there is random sampling of in- formation (Fig. 5-c) related di- rectly to the scope's trigger point which also permits pre- and post- triggering waveform evaluations, which sequential sampling can- not do. Multiple-point random sampling (Fig. 5-d) prodLices one coordinated output from a number of inputs. Some ana- lyzers also have several storage banks where one display can be compared with another, es- pecially triggering actions and preceding or following bytes of se- rial or related information. Real-time sampling of a DSO requires as many as 10 samples per period to accurately recon- struct a single-shot waveform. Repetitive sequential signal ac- quisition, however, is not deter- mined by digital bandwidth restrictions, but by the os- cilloscope's vertical (analog) am- O THE NEW TEKTRONIX 2221 A 100-Ms/s analog and digital storage q scope offers advanced digital processing capabilities in an eco- c nomical 100 MHz bandwidth DSO. TEKTRONIX' ANALOG 2252 4-channel scope with a 12-bit A/D converter, an Epson FX-series printer, and an IBM remote PC all combined to form a complete recording package. 34 HEWLETT PACKARD'S MODELS 54600 and 54601 combine the convenience and display responsiveness of analog instruments with the measurement power of digital architecture. Both models feature 100-MHz repetitive bandwidth, 2-MHz single-shot band- width, 20 Ms/s, and a pushbutton hardcopy output. PANASONIC'S VP-5710A is a menu-driven, 4-channel DSO with a large 64K memory. A unique display position lets you view a large part of the signal on the top of the screen, with a small portion of the waveform below it. plifiers since there is no mutual time relation between the dig- itizers internal clock and incom- ing signal, even though such sampling occurs at fixed inter- vals. Often, the clock rate is con- siderably lower than that of the sampled signal. That means that a 100-MHz analog/digital os- ANALOG VOLTAGE 4 3.5 3 2.5 2 1.5 1 0.5 1 r/ Q i. f t FIG. 7— QUANTIZING BY A/D converters transforms analog voltages Into digital binary bits at selected levels. cilloscope can reasonably display 100 MHz analog and repetitive signals, and only 10 MHz real- time information. That's a sig- nificant statistic in evaluating DSO's, although that 10:1 ratio can increase to 6: 1 and even 2.5:1 in some of the higher bandwidth instruments with generous in- terpolation, as we have already discussed. Quantizing Quantizing develops as the next step, and is simply defined as a staircase of discrete levels identifying logic bit assignments of analog values to the variously sampled points. As shown in Fig, 7, when the analog voltage in- creases, decision levels are reached causing the ADC to change states adding additional "l's" and "0's" to the binary out- put. As always, there's a small measure of uncertainty in any BINARY OUTPUT FIG. 8 — A FLASH CONVERTER is used to quickly convert analog signals to digital output. Resistors, comparators, and their quantizing decoder are shown. digital electronic processing, and that quantity is usually ex- pressed as ± the least significant bit (LSB). Here, however, quan- tizing uncertainty registers as noise and the fewer AD bits the more noise. Larger AD s have pro- portionally less noise, as you might expect. A/D converters There are various methods of digitizing different voltage levels of a waveform. Four types we will discuss are; successive approx- imation, flash conversion, charge coupled devices (CCD's), and scan converters. Successive approximation compares an input voltage with respect to the output of a digital- to-analog converter (DAC). It se- lects a position for the most sig- nificant bit (MSB) in discrete but fixed-time conversion steps. Therefore, there's a tradeoff in- volving both resolution and con- verter speed, which means long conversion times for maximum resolution conversion. A more commonly used meth- od is that of flash conversion (Fig. 8) involving a number of re- sistive dividers, an equal number of comparators, and a decoder which produces binary outputs. Flash conversion is used in a number of applications, includ- ing video codecs, where signals are applied to one input of the comparators and a reference or bias voltage across equal-value resistors to the other comparator input. With input voltages ex- ceeding the reference, all com- § m n m 30 ^x to to 35 PANASONIC MODEL VP-5741A has the same features as the 5720A except it has an analog bandwidth of 100 MHz with a sampling rate of 100 Ms/s and a 10K x 3 memory storage. PANASONIC MODEL VP-5720A is a 2-channel, 50-MHz repetitive bandwidth DSO featuring a 15-MHz single-shot bandwidth and a 40 Ms/s sampling rate. It has a 8K x 3 memory storage and an expandable memory option. g z 8 UJ o < DC parators deliver a high output, and zero inputs result in a low. In between, combinations of vari- ous voltage levels proceed Into the encoder and result in a reg- ular binary bit-stream driven by a rapid-system clock. Flash converters have a fast conversion rate, but they can be expensive and their resolution decreases as the sampling rate is increased. You may want to con- sider a CCD which accepts in- puts at over 100 Ms/s. A CCD is CRT SECTION COW R0LS THE BRIGHTNESS. FOCUS. AND ALIGNMENT OF THE CRT TRUCE. ALSO, CONTROLS THE UR1GHTNES5 OF THE GRATICULE LIGHTS PROVIDES A BEAM FINDfR FUNCTION 10 AID IN LOCATING DISPLAYS DEFLECTED OFF SCREEN. not an actual ADC, but an analog sampler which accesses rapidly and, by bucket-brigade action, converts the samples to a consid- erably lower rate at some discrete level. Its "bucket" cells are charged accordingly and repre- sent an equivalent number of data points during a single in- coming cycle, reserving several cells for CCD control. The advantages of CCD's are their 100-Ms/s operation and lower cost over flash converters. STORE SECTION CONTROLS MENU DISPLAYS, CURSORS ANO METHODS OF SAVING AND DISPLAYING THE STORED WAVEFORMS l&RtrOniX 2232 M.J MH* DIGITAL STORAGE OSCILLOSCOPE T Also, the resolution does not de- crease as the sampling rate is changed. One disadvantage of CCD's is that the scope cannot accept data during the digitizing period. Scan conversions are also pos- sible with double-ended cathode ray tubes that store intelligence on one side of the CRT target, reading it off with a separate beam on the target's back side. They're very fast but expensive, and no new information may be TRIGGER SECTION TRIGGER CONTROLS ALLOW YOU TO SELECt JUST THE RIGHT TIME OR EVENT TO TRIGGER THE SCOPE. IT TELLS THE SCOPE WHEN TO BEGIN DISPLAYING DATA. OR IN THE STORE MODE, TO ACQUIRE AND DISPLAY DATA. STO R EflOH-STORE CONTROLS WHETHER THE SCOPE FUNCTIONS IN THE ANALOG MODE OR IN THE DIGITAL STORAGE MODE, i f \ m ,; ^ ■ h ■■ \ T I t • • • ■ ' ■ '■ -^ — I I I' I I I I I I ! I I I I -»'« -^" '. '■ 4 . 1 i»" [ &AV1 Htn: t * ^J jL Ml fiTGUi la.in^-'i.ii WUwfiitT VERTICAL HORIZONTAL B TRIGGER \ ^&T .•"-POSITION ».'l SWP SIC ,-„ POSITION lCVlk2 t(TUP a«i urt*.n Rji ri.ui lunp *r0Ui»Hia*8.1 Ext Acq Knob s'dfu Clock Modes Funt FIG. 11— INITIAL SELECTABLE SETUP for incoming waveforms in one of the storage modes. am-B.iaav TRifii~e.ii3 aT-a.efw.s AVERAGE B.1.9 FIG. 12— CRITICAL MEASUREMENTS are both easy and accurate with a good DSO, Here you're looking at a simulated one- shot with a very fast rise time. 6U1-0.098U TRIG 1~8. fit U &T-1.715.S SAVE A S3 A A A x \ 1 \ \ i \ i \ B.2V fiUERAGE 0.S.* FIG. 13— AT 4K STORAGE, interpolation, or lack thereof, is plainly evident as the relatively flat times of these rounded pulses indicate. Then, ifyour A/D offers 8-bit con- version, that would amount to 2 s discrete levels, or a total binary number of 256. Therefore, your DSO's vertical resolution would become 400 x 103/256 = 1.5625 mV. Similarly, a 4-bit A/D instru- ment would only exhibit 25 mV resolution ( A Ae). So the combina- tion of analog-to-digital con- version bits and vertical scale settings do, indeed, determine a DSO's ability to separate the vari- ous details of waveforms. That differs from accuracy, which is an accepted standard value that the scope may or may not fully re- produce. Measurements, how- ever, can't be more accurate than the DSO's resolution, and that's why such resolution becomes ex- tremely important. Horizontal resolution is a mea- sure of the number of time incre- ments that are stored in digital memory. If the signal is stored in 1024 data words, then the hori- zontal resolution is W024 or 0.098%. According to Tektronix, analog cathode ray tube resolution is de- rived from the CRT face area and the size and shape of its electron writing beam. The vertical and horizontal CRT amplifiers gener- ally become further limiting fac- tors in the analog domain. But in a digital scope, vertical resolu- tion amounts to A/D resolution, but its accuracy, like analog scopes, depends on input and output amplifiers and is no more than 2-4% vertically and 1-3% horizontally. However, with im- ages "frozen" on the CRT's face and the use of accurate markers called "cursors," many of the foregoing errors can be largely overcome, especially the horizon- tal ones. A DSO uses a crystal oscillator clock instead of a linear sweep to generate its time base. The dig- ital clock is so precise that ac- curacy of 0.01% is possible with great stability. Consequently, while vertical accuracy is largely limited by analog readout, hori- zontal accuracy becomes that of the clock, memory length, and/or o cursor resolution and preci- m sion — a vast difference over ordi- §j nary analog which is usually no ^ better than 2% and subject to in- - evitable drift with aging. Another <£ 37 g RADIO-ELECTRONICS TABLE 1— DIGITAL STORAGE 0SCILLOSC0 \ Standard Analog Maximum Y-channel On-Screen Vertical Acquisition Memory Time Base Recorder Manufacturer Model No. Bandwidth Sample Rate Inputs Cursors Readouts Resolution Modes*' Storage (seconds/cfiv.) Outputs" Price B&K Precision 2522 20 MHz 10Ms/s 2 No none 8 bits "3 2K/ch 0.2s-0.5us Pen lift outputs $995 Philips/Fluke 95 Handheld 50 MHz 25 Ms/s 2 Yes Yes 8 bits *7 Store/re call 8 waveforms 60s-10ns $1,295 97' 6 Handheld 50 MHz 25Ms/s 2 Yes Yes 8 bits H Store/recall 8 waveforms, 1 setups 60s-10ns Remote control RS-232C interface $1,595 PM3320A 200 MHz 250 Ms/S 2 2 X-Y Yes 10 bits "8 4 memories of 4Kx1 0-bit words 5s-5ns RS-232 or IEEE 488 interface $7,750 PM3323 300 MHz 500 Ms/s 2 2 X-Y Yes 10 bits •8 4 memories of 4Kx1 0-bit words 5s-5ns RS-232 or IEEE 488 interface $8,500 PM3335 60 MHz 20 Ms/s 2 Yes Yes 8 bits auto, single multisingle 16K 50s-1 Ops RS-232 or IEEE 488 interface $2,395 PM3350A 60 MHz 100 Ms/s 2 with auto set 2 X-Y Yes 8 bits *3 plus auto zoom 16K (8 traces) 0.5s-O.5us X-Y rec. and matrix printer option 40/50 $3,590 PM3355 60 MHz 250 Ms/s 2 with auto set 2 X-Y Yes 8 bits *3 plus auto zoom 16K (8 traces) 0.5s-O.5us X-Y rec. and matrix printer option 40/50 $4,490 PM3365A 100 MHz 100 Ms/s 2 with auto set 2 X-Y Yes 8 bits *3 16K (8 traces) 0:5s-G.5us Pen lift outputs $4,990 PM3375 100 MHz 250 Ms/s 2 with auto set 2 X-Y Yes 8 bits *3 16K (8 traces) 0;5s-0.2ns Pen lift outputs $5,390 Gould 1604 20 MHz 20 Ms/s 4 2 Yes 8 bits *3 10K 200s-50us X-Y 56,595 plus auto zoom 1624 20 MHz 20 Ms/S 4 {with pairs) 2 Yes 8 bits *3 plus auto zoom 10K 200s-5ps X-Y $8,195 ■ Ha meg HM40S 40 MHz 40 Ms/s 2 X-Y Yes 8 bits *3 2K 1s-50ns Plotter $2,398 HM205-3 20 MHz 20 Ms/s 2 - No No 8 bits *3 2K 1s-20Gns Plotter $1,076 Hewlett 54501 A N/A 10 Ms/s 4 2 Yes 8 bits *3 501 points 5s-2ns Plotter $3,990 Packard programmable 54502A N/A 400 Ms/s (repetitive) 2 2 Yes 8 bits *3 programmable 501 points and2K extendable 5s-1 is Plotter $7,450 54600A 100 MHz 20 Ms/s 2 2 Yes 8 bits *3 4K 5s-2ns Plotter and printer option $2,395 54601A 100MHz 20 Ms/s 4 2 Yes 8 bits *3 4K 5s-2ns Plotter and printer option $2,895 Hitachi VC6023 20 MHz 20 Ms/s 2 2 Yes Shits 'A 2K 50s-0.2us Plotter $1,995 VC6024 50 MHz 20 Ms/s 2 2 Yes 8 bits ■4 2K 50s-0.2ps Plotter $2,295 VC6025 50 MHz 20 Ms/s 2 2 Yes 8 bits *4 2K 50s-50ns Plotter $2,595 VC6045 100 MHz 40 Ms/s 2 2 Yes 8 bits "4 4K 50s-50ns Plotter $3,395 VC6145 100 MHz 100 Ms/s 4 2 Yes 3 bits *4 2K 50s-50ns Plotter $5,295 Kenwood CS8010 20 MHz lOMs/s 2 2 Yes 3 hits *5 2K 1s-0.5us Plotter $1,495 Kikusu DS5020A 20 MHz 1 Ms/s 2 No No 8 bits *5 1K/ch 1s-0.2us X-Y recorder $1 ,495 DS5040 40 MHz 25MS/S 2 No No 8 bits "5 1K/ch 1s-0.2us X-Y recorder $1 ,995 COM7101A 100 MHz 50 Ms/s 4 Yes plus DVM, Counter Yes 3 bits *5 1K/ch 0.05s-10ns X-Y recorder £5,895 COM72Q1A 200 MHz 50 Ms/s 4 Yes plus DVM, Counter Yes 8 bits *5 1K/ch 0.05s-10ns X-Y recorder $6,895 Leader 300 handheld 31000 N/A 100 MHz 30 Ms/s 40 Ms/s 2 2 No 2 Yes Yes 7 bits 8 bits *5 *5 1.8K words/ 2K words/oh 200s-0.1ns 50s-50ns Plotter Plotter SI ,995 $3,695 LeCroy 9410 150 MHz 100 Ms/s 2 2 Yes 4096 points *5 10K/ch 10 d s-2ns X-Y and dot matrix $6,900 Ntcolet NIC310 N/A 1 Ms/s 2 2 Yes 12 bits with zoom *5 Floppy disk 88 4K/disk 200s-1us X-Y or strip chart S4,995 Panasonic Factory Automation Co. VP-571GA VP-5720A 100 MHz 50 MHz 20 Ms/s 40 Ms/s 4 2 GND-V, zyJAV, t1/At Yes Yes Yes 8 bits 8 bits Roll, rep. 8-MHz Single shot Programmable 6Kx1 or user adjustable memory 8Kx3 0.5s-20ns 50s-5ns GP-IB plotter interface GP-IB plotter interface, X-Y $3,995 $5,900 VP-5741A 100 MHz 100 Ms/s 2 Yes Yes 8 bits Programmable 10Kx3 50s-5ns GP-IB plotter interface, X-Y $8,900 VP-5750A 100 MHz 200 Ms/s 2 Yes Yes 8 bits Roll, rep. Programmable 80K non volatile memory 50s-5ns GP-IB plotter interface, X-Y $9,900 Tektronix 222 PS 10 MHz 10 Ms/s 2 No Yes 8 bits Roll, scan 512 points 20s-0.05us RS-232 interface $3,295 TDS520 500 MHz 500 Ms/s 2 Yes Yes 8 bits Ret., roll, detect 50K points/ch. 1 0s-500ps GP-IB 488.2 $9,490 2201 20 MHz 10 Ms/s 2 No No 8 bits 25 levels/div. Roll/scan 2K 50s-100ns Epson (optional) $1,695 2211 50 MHz 20 Ms/s 2 2 Time and volts 8 bits 25leve!s/div. Roll/scan 4K 50s-50ns Epson (standard) $2,795 2221 A 100 MHz 100 Ms/s 2 2 Yes 8 bits "5 and X-Y plot 1K/4K 0.5s-5ns X-Y or dot matrix $3,995 2232 100 MHz 100 Ms/s 2 2 Yes 8 bits *5 and X-Y plot 4K extended to25K 0.5s-5ns X-Y or dot matrix $4,995 Notes *1. Standard acquisition modes become special acquisition modes in some cases. Contact the manufacturer for detailed information on variations of acquisition modes. *2. Recorder outputs are normally either X-Y or dot-matrix plotters, but they can be strip charts and floppy disks as well. The individual specification sheets will list the many available options. *3. Roll, refresh, single shot. *4. Roll, average, smoothing, one shot, *5. Roll, pen, one shot. *6. Special features of Fluke's handheld model 97 include sine wave or square wave signal generator, component tester output for voltage or current ramp and various multimeter modes. *7. Min., max., average record, variable persistence, *8. Auto, auto zoom, single, multisingle, roll, triggered roll, averaging, enveloping, save/stop on diff. I.66L UaaiMBAON 03 O z o DC o LU _l 111 6 Q < DC FLUKE'S HANDHELD SCOPEMETER models 95 and 97 feature 50-MHz dual channel, 25 Ms/s sampling rate with auto- set. A combination DSO and DMM, these Instruments are ideal for rugged fietd use. Model 97 also has a sine wave or square wave signal generator output with op- tically isolated RS-232C remote control operation. strong argument for maximum DSO horizontal accuracy is re- peatability of measurements, and reduction of human errors by the use of cursors. The front panel Now that you have a general idea of what DSO's are designed to do, let's quickly introduce you to the front panel of a Tektronix model 2232 100 MHz, 100 Ms/s digital/analog oscilloscope from graticule to the front panel, CRT and dot-matrix (they're less ex- pensive) printer readouts. Figure 9 shows the bezel and all front panel analog and digital controls. The callouts indicate 1 x and 10 x vertical amplifier settings from 2 mV to 50 V/div., sweep speeds from 50 ns/div. to 0.5 s/div, delayed sweep, TV field and line, variable holdoff, trigger- ing levels, and X-Y mode in the analog sections and setup, dis- play, plotter, signal acquisition, storage, cursors, plotter output, waveform select, memory ac- quisitions, and save references, plus setup menus in the digital portion. A side panel contains an auxiliary connector and IEEE 488 or RS-232 port. Applications The first example shown in Fig, 10 is an output of a less expensive function generator with slight calibration and waveform purity problems, both of which are often found in inexpensive digital cir- cuits. The bottom waveform is "supposedly" a reasonably linear sawtooth, while the top wave- form is semi-staircase. The dis- play has a time base of 2 p-s/div. , is sampled at IK, its AC voltage develops to 0.9 V since the ver- tical amplifier is set at 0.5 V/div. , the trigger level for amplifier Yl reads out at 0.76 V, and the time between X origin and X A time T equals 12.2 \ls. With absolutely no trace movement the mode is "save," and the SREF 1 A is in- cluded since it was previously stored. The line under "A" means the cursors are now positioned as shown on the acquired signal. The SAVE REF 1 remains until another waveform writes over this one and takes its place in memory. Except for the stored SREF 1 A, that same signal could have been shown similarly by an ordinary analog scope but probably with- out as much stability and proba- bly without the on-screen read- outs. The only fundamental parameter not immediately read out in modestly priced DSO's is the voltage difference between pulse peaks, and that is simply the inverse of time which is easily calculated, but not as accurate as 3-place electronic computation. Incoming information Now that programmable and primary hardware have been combined, let's begin to move on to some more intricate uses. With the help of a Tektronix/Polaroid C5-C oscilloscope camera, a menu for the Acquisition mode is adjusted so the 2232 will respond DSO SOURCES B&K Precision Kikusui Int. Corp. 6470 W. Cortland St. 19601 Mariner Ave. Chicago, IL 60635 Torrance, CA 90503 (312) 889-1448 (213) 371-4662 CIRCLE 351 ON FREE INFORMATION CARD (800) 545-8784 CIRCLE 358 ON FREE INFORMATION CARD John Fluke Manufacturing Co. Krenz Electronic, Inc. Box 9090, MS 250E 1020 Calle Cordillera Everett, WA 98206 Suite 107 (206) 356-5500 San Clemente, CA 92672 CIRCLE 352 ON FREE INFORMATION CARD (714) 361-2433 CIRCLE 359 ON FREE INFORMATION CARD Gould Inc. Recording Systems Div. 3631 Perkins Ave. Leader Instruments Cleveland, OH 44114 380 Oser Ave. (216) 361-3315 Hauppauge, NY 11788 CIRCLE 353 ON FREE INFORMATION CARD (516) 231-6900 CIRCLE 360 ON FREE INFORMATION CARD Hameg Inc. LeCroy Corp. 88-90 Harbor Rd. 700 Chestnut Ridge Rd. Port Washington, NY 11050 Chestnut Ridge, NY 10977 (516) 883-3837 (914) 425-2000 CIRCLE 354 ON FREE INFORMATION CARD CIRCLE 361 ON FREE INFORMATION CARD Hewlett-Packard Co. Nicolet Instrument Corp. 19310 Pruneridge Ave. Test Instrument Division Cupertino, CA 95014 PO Box 4451 (800) 752-0900 Madison, Wt 53711 CIRCLE 355 ON FREE INFORMATION CARD (608) 273-5008 CIRCLE 362 ON FREE INFORMATION CARD Hitachi Dens hi America Ltd., Panasonic Factory Automation Co. Test & Measurement Div. Electronic Measurement Systems 150 Crossways Park Dr. 9401 West Grand Ave. Woodbury, NY 11797 Franklin Park, IL 60131 (516) 921-7200 (708) 452-2501 CIRCLE 356 ON FREE INFORMATION CARD CIRCLE 363 ON FREE INFORMATION CARD Tektronix Inc. Kenwood USA Corp. Test and Measurement Group 2201 E. Dominguez St. PO Box 1520 Long Beach, CA 90810 Pittsfteld, MA 01202 (213) 639-4200 (800) 426-2200 CIRCLE 357 ON FREE INFORMATION CARD CIRCLE 364 ON FREE INFORMATION CARD 40 to these or other selected settings in preparation for either conve- nient or specific measurements (Fig. 11). Our attention will be di- rected to the various setup pos- sibilities that are available on the setup menu. A rectangle denotes each selected position. In Fig. 1 1 , the Sample mode is selected which produces 100 samples for each graticule divi- sion; the greater than 0.1 s/div. selects either Roll or Scan storage for settings above this figure. Roll mode is somewhat like an elec- tronic chart recorder, permitting slow signals to move across the CRT's face continuously from right to left; and the Trigger, indi- cated at 128/1K storage by the "T" symbol towards the upper left can be adjusted and positioned incrementally between 4 and 1020 on the IK record, or from 16 to 4080 on the 4K record. In the Acquisition mode's sis- ter display menu, A Time and A Frequency may also be selected as well as Peak Detect, waveform smoothing, and a Vectors mode, filling spaces between adjacent data points, producing a smooth, connected image. In Auto, Vec- tors operate at all times except from 0.5 to 0.05 p,s (Repetitive Store). Examples Now that parameters are estab- lished according to the acquisi- tion setup in Fig. 11, it's easy to look at such critical values as voltage measurements, trigger levels, and rise times shown in Fig. 12. At 0.1 jis/div. and 0.2 V/ div. , the A voltage readout is 0,428 V, the trigger position is at 0.11 V, and the time between 10% and 90% markers measures 0.064 \ls which automatically be- comes the rise time. When you turn the scope and signal information off for several hours, the same stored display reappears when power is applied. You haven't missed anything, and all the parameters remain. A Polaroid photo of the display rec- ords the image for posterity. If you want to translate those mi- croseconds into nanoseconds, just move the decimal three places to the right and the rise time becomes 64 x 10~ 9 . It's just that simple. The waveforms of Fig. 13 are shown at a 4K sample rate which LEADER'S MODEL 300 features 30 Ms/s digital storage with a DMM, printout, and logic analyzer combination. builds up the display over a con- siderable period. The interpola- tion isn't quite extensive enough to form a continuous pattern among the rise and fall portions. That occurs when sweep speeds exceed 1 |xs/div. The bar graph above the "rectangled" cursor signals a switch to a 4K-record length, although only IK of infor- mation is displayed at a time. The T for trigger point remains, but only at the 0.64 V level, and the time between cursors amounts to 1.715 u,s. The amplitude (A VI) difference between the two cur- sors is only 0.008 V, which is fair- ly close to being even. The 'Average" notation on the dis- play's bottom means random sig- nal noise is reduced by multiple signal inputs over a number of records. Where you looking for a glitch among those voltages, you would select the peak or AC-peak detect mode, making the 2232 sample at its maximum digitizing rate as you search for a 10 ns or greater waveform abnormality. Note how nicely those displays photograph with a C5-C camera. Digital featues are gradually making their way into analog scopes (see our Analog Os- cilloscope article in this issue). Tektronix' 2252 is a multi-ap- plication analog scope with 4- trace readout and an ADC. The 2252 is strictly analog from input to virtual output, but one large 12-bit A/D converter for hard copy reproduction bars the way. Tek's 2252 is a 4-channel, 100- MHz answer to those who want to see glitches, spurs, preshoots, overshoots, and all associated in- terruptions greater than 10 ns. It can be used with an Epson FX series dot-matrix printer, and doesn't require one-shot record- ed storage. Plotter printouts of this unique one-of-a-kind instru- ment can show transients, pre- shoots, overshoots, and random glitches. Evaluations Most DSO's we'll mention fall within a 20-200 MHz group and are dual analog/digital units very popular now in the marketplace. Table 1 shows a rundown of many popular scopes now available, with some important specifica- tions. Although several manufac- turers, such as Hewlett Packard and Nicolet, do not produce com- bination units, they occupy strong positions in the industry and are included as well, plus two special digitizers, one of which doubles as a spectrum analyzer and the other a 4-channel analog scope with an A/D digital printer readout. • Hitachi— A real surprise with eight models already available and more on the way. Prices are attractive, superb, inclusive specifications, and interesting bandwidths. Models VC-6075, VC-5175, VC-6275 are not listed, but are still available. • Leader-Two new announce- ments: a 30 Ms/s AC/DC -operated DSO that also features an 8-bit logic analyzer, a data logger for DMM functions, and an auto- ranging digital multimeter, all in one 2.6 pounds instrument (Model 300); and a Mod. 3100 conventional analog/DSO having 100 MHz analog and 40 Ms/s with averaging "settable" from 2 to 256 bits, plus voltage, time, phase, and dB difference ratios. • Hewlett Packard-Doesn't com- bine analog and DSO's, but pro- duces DSO's only. Four of their less expensive DSO's are listed with their dual time base dis- plays, custom integrated cir- cuits, 8-bit A/D converters {ex- cept the 54502 which has a 6-bit converter), and modular probes. The company's newest is the HP 54510A at $10,950, having a sample rate of 1 Gs/s, repetitive bandwidth of 250 MHz and 8-bit vertical resolution — all portable. • Tektronix-Not to be outdone by HR Tektronix has introduced three all-digital scopes, one with a 10-MHz sampling rate and a de- flection factor of 50 mV to 500 V/ div. called the 222PS Power Scout. The 222PS is intended for rugged field work such as indus- o < m m x 41 Tek Direct has a wide range of scopes, starting at less than $1000. Plus afford- able probes, TV/Video gear, meters, and much more. So ring us up and order your free catalog. We're just waiting for you to connect. 1-800-426-2200. 8AM-5PM. All time zones. Ttektronix COMMfTTEO TO EXCELLENCE Copyright © 1991, Tektronix, [nc. All rights reserved. 49A-187SS6. CIRCLE 92 ON FREE INFORMATION CARD trial power systems, marine re- pair, and plant maintenance. Tektronix models TDS 520 and TDS 540 have two and four chan- nels, respectively, and feature surface-mount components so that amplifier and trigger-logic circuits can be mounted on a sin- gle PC board. In both models, digitizers oper- ate continuously at full speed and peak-detect glitches as small as 4 ns, regardless of the time -base setting. The single-channel sam- pling rate for models TDS 520 and 540 is 500 Ms/s and 1 Gs/s, respectively. Record storage lengths are 5 OK points per chan- nel, augmented by zoom pre- views and signal expansions plus 90 on-screen icons, or images, for user aids — the beginning of a brand new TDS series by Tek. Relatively low cost for 100 MHz, 100 Ms/s, plotter and printer out- puts, extensive training, simple controls, ample memory, good application notes, solid perfor- mance and long life. • Nicolet-The NIC-310 is a new model with simplified controls, vertical and horizontal trace ex- pansion to 60 x , automatic sig- nal acquisition, massive storage and built-on disk drive controls, also portable. • LeCroy— Another fine manufac- turer of high quality instruments whose Mod. 9410, large-screen scope, optional 512K credit card memory, vertical sensitivities as low as 100 LtV/div. , pen or digital plotter outputs, offers displays in color, and a 1,000-point fast Fourier transform (FFT) to be completed in less than a second (another option) to operate as a spectrum analyzer! • Kenwood and B & K Preci- sion — Manufacturers of similar, low frequency, inexpensive scopes with virtually identical specifications. • Philips— Supplies several lower- cost analog and DSO combina- tions with interesting features, 100 and 250 Ms/s, 16K memo- ries, and attractive pricing, to- gether with excellent application notes — well worth investing in. • Hameg— Also offers a pair of low-cost 20 and 40 MHz/Ms/s scopes (models HM205-3 and HM408) with 2K memories. X-Y cursors, and 8 bits of vertical res- olution. • Kikusui-Their COM 7101A and 720 LA have four inputs and 200 MHz analog response and 50 Ms/s for digital storage. They in- clude a DVM and a frequency counter. • Krenz— Model 3350 is a 2- channel, 50-MHz, 100-Ms/s DSO with 8-bit resolution and a 4K memory. Krenz also offers a PSO 5570 MS-DOS compatible main frame with 8 channels, 20 MHz sample rate, up to 12-bit resolu- tion, a 50-megabyte hard drive and a 1.44-megabyte floppy drive. Analog input modules with various preamp, A/D converter, and memory specifications are used with the main frame. Other base units offered are the PSO 7010 and PSO 7040 featuring 8 and 16 channels, respectively, with a 14" color video display for high-resolution color graphics. • Panasonic— Starting at $3995 and ending at $9900, Panasonic currently produces four DSO's with reasonably large memories; three of the four have two chan- nels- with 7-inch CRT's. Model VP-5710A has a sampling rate of 20 Ms/s with 4 channels, model VP-5720 is a 2-channel, 40 Ms/s DSO with arithmetic and wave- form functions, 100 Ms/s model VP-5741A has time shift and a calculator, and 200 Ms/s model VP-5750Ahas an 80K-word, non- volatile memory in addition to autoranging, programmable, and interpolation functions. All have effective nonstorage band- widths of DC to 100 MHz, except model VP-5720A which has a bandwidth of 50 MHz. What you see in the scopes we've discussed is both low cost and limited effectiveness, and higher cost with broadly in- clusive instruments which have many common and a number of diverse features. New models are appearing rapidly and designs al- most improving daily. Some time bases even stretch to 50 and 200 seconds on the low end, highly suitable for measuring power ap- plications, slow mechanical movements, ballistics, electrical phenomena, injection molding, drive controls, and so on. We advise you to take your own sweet time in DSO selection, study all specifications, check short term and long term require- ments, consider the source, re- view training and applications, then worry about the price. R-E 42 ANALOG SCOPES JEFF O'NEAL* ■■BBS IB rr $ .. .they' re far from dead! IF YOU'VE BEEN LEANING TOWARD buying a digitizing oscilloscope, you might want to take another look at analog scopes before spending your hard-earned money. It's true that digital scopes offer many features — measurement cursors, automatic setup, pro- grammability, and all those built- in microprocessor smarts. You can even transfer waveforms from a digital scope to a PC and do whatever you want with them — analyze them, store them on a disk, or output them to a printer. However, modern analog scopes offer many impressive fea- tures as well. Many newer analog designs use built-in micro- processors for automatic setup, measurement cursors, and pro- grammability. In fact, some ana- log scopes can even be hooked •Jeff O'Neal is a Producl Marketing Engineer for Tektronix, Inc. directly to a printer for waveform hardcopies. Waveform printouts, as well as many other features, are no longer the exclusive do- main of digitizing scopes. In short, today's analog os- cilloscopes are much smarter than yesterday's. They offer many of the same features as digital scopes and even surpass them in a variety of basic measurement capabilities. The real distinctions, however, are in how each type of scope ac- quires and displays waveforms for measurement. This has al- ways been the fundamental issue in scope choice and continues to be so. It's an issue of understand- ing your waveform observation and measurement needs, then understanding how each type of scope addresses those needs. Keep in mind, though, that each oscilloscope technology of- fers its own unique advantages. That's why many oscilloscope manufacturers offer both digital and analog scopes. Some scopes may even combine both tech- nologies to take full advantage of the unique strengths of each. Real-time vs. storage Figure 1 illustrates a basic dis- tinction between analog and dig- ital scope waveform acquisition. Both waveform photos show the same jittered signal. The dif- ference is that one waveform is displayed in real time on an ana- log scope (1-a), while the other is a digitally stored waveform dis- played in vector form on a digitiz- ing oscilloscope ( 1-b). Notice that the analog scope clearly shows the jitter in its en- tirety. That includes not only the extremes of the jitter excursions, but the time distribution of the jitter as well. The distribution is seen in the intensity variation of the multiple traces in the jitter region. The brighter areas are 43 FIG. 1— REAL-TIME DISPLAY OF PULSE JITTEFl on an analog scope showsfar more detail (a) than on a digital scope display (£>). to o z o cr G LU _l LU Q Q < where the jittered edge spends most of its time; the dimmer areas are where it spends less time. In comparison, the digital scope shows far less definition of the jittered edge (1-b). That's be- cause the digital display is a sin- gle trace reconstructed from digitized waveform samples stored in memory. The digital scope's representation of the waveform is restricted to a single- amplitude value for each point in time. An analog scope display, be- cause it's made up of multiple real-time traces, can show multi- ple amplitudes at any point in time. That's extremely important for observing and analyzing com- plex, real-time signal activity such as jitter, various TV wave- forms, and modulation, as shown in Fig. 2. Modulated color levels are clearly visible in the in- tensity variations of an analog scope display (2-a). while a digital scope display conveys little infor- mation (2-5). The differences between real- time analog and digital scope dis- plays become clearer when com- paring the two acquisition pro- cesses. The basic architecture of each type of scope is shown in Fig. 3, and the acquisition con- cepts are shown in Fig. 4. The capture process Notice in Fig. 3 that the overall architecture of both types of scopes is the same in many re- spects. Both scopes must have a high-quality analog front-end with adequate bandwidth and fidelity for the signals being cap- tured. Both must have triggering circuits for triggered capture and display of waveforms. Both must have horizontal and vertical drive circuits in order to trace a sig- nal's waveshape across the CRT display (except for raster-based displays, which work differently). And both can have built-in mi- croprocessors for digital automa- tion of instrument setups and other control functions. The main difference is in the input signal path from the ver- tical amplifier to the display. An analog scope has an analog path that passes the signal to the dis- play in real time. In more ad- vanced scopes, this analog path may also include integration of various measurement functions, such as voltmeters and counter/ timers. In the case of the Tektronix 2252 oscilloscope, the analog signal is also sampled by an A/D converter to provide out- put to a printer for hardcopies of repetitive waveforms. But the main signal path is pure analog. Digitizing scopes, on the other hand, sample and digitize the analog signal as soon after the vertical amplifier as possible. There are numerous schemes for doing this, but the general goal is to sample, digitize, and store points as fast as possible for the price range of the particular dig- itizing scope. Figure 4 illustrates the general capture processes involved for both types of scopes. In both types, the capture process occurs over a time period referred to as a 44 capture window. In the case of an analog scope (4-a) the window is determined by the scope's sweep speed setting. A l-(xs/division set- ting, for example, provides a 10-u.s window on a scope with 10 horizontal display divisions. The portion of the waveform captured is determined by the capture-window length and the trigger-system setting. In the analog scope case of Fig. 4-a, trig- gering is set for the beginning of the positive slope on the wave- form being measured. When a positive waveform slope is encountered, the analog scope's sweep circuit is triggered. The waveform is traced on the display. Then at the end of the sweep, the CRT beam is blanked and retraced, and the scope's trigger circuit is rearmed for the next sweep. The blank-retrace-rearm se- quence, sometimes referred to as rearm dead time, is normally quite short in analog scopes. Thus, an analog scope can trig- ger through a quick sequence of capture windows. That allows the scope's CRT beam to repeat- edly trace the shape of a re- petitive waveform, keeping the screen phosphor highly excited for a bright trace. Or, as is the case with the analog capture pro- cess in Fig. 4-a, it shows the mul- tiple traces of pulse-width jitter. Digitizing oscilloscopes use the same capture window con- cept. Strictly speaking, however, a digital scope's capture window corresponds to the waveform memory's length (record length). Digital scopes with record lengths of 512 or 1024 waveform points typically display the entire waveform record over the full horizontal display width. Those with longer records (2048 or more points} usually display only a portion of the record and allow you to scroll the display through the record. The time it takes for a digital scope to capture a waveform into memory depends upon the scope's record length and sam- pling rate. For example, with a 512-point record and a 10-u.s cap- ture window, the scope must sample, digitize, and store a waveform point every 19.53125 nanoseconds (10 u.s/512). In other words, the scope's "real- time" sampling rate must be at FIG. 2— THE FIVE MODULATED COLOR LEVELS OF A VIDEO SIGNAL are clearly visible in the intensity variations of an analog scope display (a), while a dots-only digital scope display conveys little information about the signal's actual complexity. A digital scope's vector display would connect the dots for a clearer outline of the waveform, but still wouldn't provide the intensity variations that distinctly show the modulated color levels. least 51.2 megasamples/second (MS/s) to capture all 512 samples in one 10-u.s capture window. There's a wide selection of real- time sample rates available in to- day's digital scope market. But faster real-time sample rates mean more expensive technology and higher price tags. For the sake of economics, most digital scopes use equiv- alent-time sampling on their faster sweep settings (1 u.s/divi- sion and faster). That allows re- petitive waveforms to be cap- tured at apparently high sample rates by building up a complete sample set over multiple capture in S a m 3D — t <-D 45 windows. This is illustrated in Fig. 4-0 for comparison to the analog scope's real-time display method. Notice in Fig. 4-0 that only a few samples have been taken in two separate capture windows. On fast time-base settings, the scope's sampling rate may allow only a few samples per capture window. Thus, it may take nu- merous windows to build a full complement of 512 samples to fill the waveform record. Also, notice that a triggered capture window doesn't occur at every potentially valid trigger point. In other words, some of the pulse repetitions in Fig. 4-b are skipped. That's because of the digital scope's longer rearm dead time. Recall in the analog scope that there was a short rearm dead time where the scope's trace was blanked and retraced, then the trigger system rearmed. Digital scopes must complete some dig- ital processing on the input waveform before rearming. The length of their rearm dead time will therefore depend on the amount and speed of that digital processing. The point is, a repetitive wave- form displayed in equivalent- time on a digital scope is really a sampled composite of numerous capture windows. Additionally, the digital display traces a single set of points versus the multiple real-time traces of an analog dis- play scope. The repetitive pulses have vari- ations in the pulse width. As a result, the trailing edge samples in 4-b are actually a composite of numerous, time-shifted edges. When the samples are connected by straight lines (display vectors) for a vector display, the jittered edge looks like a burst of noise rather than the traditional ana- log scope display of jitter in real time. If a repetitive waveform is truly periodic (such as a sine wave), the analog and digital scope dis- plays usually are quite similar. The exception is when numerous waveform cycles occur over the capture window. That results in fewer samples per waveform cycle on a digital scope, and the dis- play may contain visual aliasing (see Fig. 5). Analog scopes don't sample, so they don't have this problem. \) INSTRUMENT CONTROL BUS SETUP MEMORY BUILT-IN MICROPROCESSOR CONTROL FIG. 3— OVERALL ANALOG AND DIGITAL SCOPE ARCHITECTURES are quite similar today. The major difference is that analog scopes have an analog signal path to the display and digital scopes have a digital storage path. ANALOG SCOPE DIGITAL SCOPE (EQUIVALENT-TIME SAMPLING) REARM DEAD TIME ■ ^A -1st TRIGGER \ SAMPLE SET 1 • • • r~^K. DIGrTAL SCOPE DISPLAY (TWO EQUIVALENT-TIME SAMPLE SETS SHOWN.) FIG. 4— METHODS OF WAVEFORM CAPTURE remain essentially the same in analog scopes (a), while digital scopes may use a variety of sampling schemes to emulate real- time analog signal displays (6). 46 DOTOISPUY 3 CYCLES VECTOR DISPLW A . ■ • A ■ ■ ■ ■ M- ■ • ft ■ ■ B ■ ■ ■ ■ ■ ■ • * • . ■ ■ * m » ■ ■ m m V V ■ ■ 9 CYCLES ■ B ■ • * • t 7 I 42 CYCLES *■■•.■■■■ FIQ. 5 — VISUAL ALIASING occurs when the display of a sampled waveform suggests the presence of different or additional waveforms. Dots-only displays are the most suscepti- ble to visual aliasing and can suggest that the waveform contains a low-frequency sine wave when it actually doesn't. Rubber screwdrivers The differences in capture methods can affect how easy a scope is to setup and use as well. Recall that an analog scope re- arms quickly and traces each capture window's waveform in real-time. The display updates in real-time from trigger to trigger. So, if you use an analog scope to observe a waveform and "use a screwdriver" to adjust the wave- form's amplitude, you see the change immediately on screen. With a digital scope, the equiv- alent-time display must build up over several windows, causing a slower update rate. As a result, when you make a "screwdriver adjustment, " you may not see an instantaneous change in the waveform. The delay between ad- justment and observed results is like using "a screwdriver with a rubber shaft. " Because of the "rubber screw- driver effect," and for other rea- sons (especially scope setup ease), some digital scopes offer a real-time analog mode along with the digital storage mode. You can switch between a traditional ana- log scope display or a digital stor- age display as needed. More- expensive digital scopes with high bandwidths and fast update rates provide what is essentially a real-time display like an analog scope. Now, think about what was said about sampling and digitiz- ing waveforms. Sampling means that you get discrete points equally spaced in time on the waveform and nothing in be- tween. If there are 5 12 points in the record, the time resolution of the captured waveform is one part in 512. These samples are also digitized, usually to one part in 256 resolution (8-bit digitiz- ing). The net result is that, on a digital scope, unaveraged wave- form displays have an inherent tendency to look noisy. So, when you see a noisy wave- form on a digital scope, you have to keep in mind that some of the noise is due to sampling and dig- itizing resolution (quantizing noise), and some of it is actual noise on the waveform. With an analog scope, when you see noise on the waveform, you know that all of the noise (at least up to the scope's bandwidth) is actually part of the waveform. Cursor differences Measurement cursors are lines or dots that can be positioned on a scope's display to measure time and voltage differences. There are basically two cursor types: screen-based and waveform- based. Screen-based cursors are the easiest to implement and can ap- pear on either analog or digital scopes. They can be positioned anywhere on the screen. Their readouts are simply the screen- relative amplitude and time loca- tions of the cursors. If the cur- sors are placed on the waveform trace, the readouts also represent time and amplitude locations on the waveform display. But, if the display changes, you have to place the cursors back on the waveform in order to reestablish a measurement. A smarter approach is to some- how tie the cursors to the wave- form. The cursors are then referred to as being waveform - based. In digital scopes, waveform- based cursors are tied to the waveform's stored samples. This is where digital resolution limits can become quite apparent. As you position the cursors, they may appear to jump from point to point on the waveform. This will be most noticeable on pulse edges or other fast transitions where there are fewer samples. In fact, the sample resolution may be so poor that you won't be able to pick off reasonable 10% and 90% levels on the waveform for o rise-time measurements. m To deal with that, many digital § scopes, especially those with dot- 3 connected vector displays, use g interpolation for cursor place- 2 47 60 g z O P o LLI ment. This allows you to place cursors between samples on the display for interpolated readout values. An even smarter approach to the resolution problem is to tie the cursors to the waveform trace by direct measurement of input- signal amplitude. An example of this is the SmartCursors appear- ing on some Tektronix analog scopes. The SmartCursor system uses a built-in, microprocessor-con- trolled cursor/voltmeter system. The cursor readouts not only re- flect measurements of the actual signal, but the cursors are smart enough to follow signal changes. That allows you to tune circuits for precise signal amplitudes simply by making circuit adjust- ments until the scope's cursor readout reaches the desired val- ue. It's just like using a voltmeter, except that the analog scope's cursors show you exactly where on the waveform the measure- ment is being made. In fact, the SmartCursors include automatic placement on the waveform by simply pressing buttons for peak, peak-to-peak, and other commonly needed waveform measurements. Integrated measurements Cursors are just the beginning of the measurement capabilities that can be integrated into an analog oscilloscope. Along with automatic placement, cursor measurements can also be gated on and off over selected portions of the waveform. That allows various waveform features or ab- errations to be included in or ex- cluded from the measurements as desired. Another analog scope innova- tion involves integration of preci- sion counter/timer measure- ments. Figure 6 illustrates the use of this function in a gated measurement. In Fig. 6, the counter/timer is measuring the width of a narrow spike that's barely visible in the waveform photo. {The spike would appear clearer if you were looking at the actual CRT dis- play.) The timer measurement area has been restricted to the spike (gated) by placing the in- tensified zone of the trace on the spike. The intensified zone shows you FIG. 6 — THE ANALOG PRECISION of a gated width counter measurement allows a narrow spike (276 ns) to be measured with nanosecond resolution, even at a 1 ms/division sweep speed. A digital scope would need a 10-megapoint record length for the same resolution on the same display. exactly what the counter/timer is measuring. A stand-alone coun- ter/timer, by contrast, doesn't provide you with that kind of positive visual indication of ex- actly what is being counted or timed. Another plus is that an inte- grated counter/timer function can provide higher measurement precision than a digital scope. In the case of the scope display shown in Fig. 6, the 200-MHz counter/timer has a crystal-con- trolled accuracy of 10 ppm (0.001%). That allows nanose- cond timer measurements on even the slowest scope sweep speeds. Timing measurements with a digital scope's cursors, by contrast, are constrained to the sample interval resolution. ProgrammabUity The types of integrated analog scope measurement features dis- cussed here would be next to im- possible to implement in a purely analog environment. Controlling and coordinating the data con- cerning the various scope and measurement functions can be done far more efficiently with a built-in microprocessor and dig- ital methods. Digital control does not mean, however, that the waveform must be digitized in order to be dis- played. The real-time benefits of the analog signal path and dis- play can be maintained while the remainder of the scope is de- signed to take advantage of dig- ital control. That is apparent in Fig. 3, where the digital control buses extend to all of the major scope functions except the ana- log signal path itself. All of the programmability fea- tures that are normally found in a digital scope — automatic setup, storing and recalling front-panel settings, programmed control from a bus-connected computer, and being able to output a wave- form to a printer — can also be found in an analog scope. So, un- less you absolutely need the ca- pability of digital waveform storage, an analog scope could very well be your best choice. The best way to decide, however, is to get a demonstration of both types of scopes on the particular types of waveforms that you deal with regularly. Then you can make an informed decision on the best scope for your needs. If you still aren't sure whether or not a digital scope is worth the expense, consider what you might do with the money you save if you buy an analog scope. Perhaps there's some other test equipment that your workbench is sorely lacking. R-E 48 BUILD THIS DQPPLER ULTRASOUND THE AVERAGE HUMAN HEART CAR- ries out its pumping action over 100,000 times every day. Gener- ating its own electric signals to actuate the heart muscles, the heart contracts and relaxes dur- ing each beat. We will show you how you can convert the hearts' motion into audio sounds using ultrasound electronics with our Doppler ultrasonic stethoscope. For less than $150 you can build this educational instrument which will help you learn more about human physiology. In 1957, an article in The Jour- nal of the Acoustical Society of America described how cardiac functions could be inspected by the use of Doppler ultrasound using a frequency of about 2 MHz. The Doppler effect is the change in frequency of sound, light, or radio waves that occurs when a transmitter and receiver are in motion relative to each other. When a transducer sends an ultrasonic beam into the body, a portion of the energy is reflected back by internal body structures. If the structure moves, the fre- JOE JAFFE quency of the reflected beam is changed in proportion to the ve- locity of the movement. Almost thirty years ago this technology was developed into a valuable and completely harmless tool for non-invasive examination of movements in- side the body by the medical pro- fession. Experiments have shown that beaming very low-en- ergy high-frequency sound into the body is not harmful. The technique is used all over the WARNING!! The information contained in this article is being provided solely to readers for educational purposes. Nothing contained herein suggests that the monitoring system described herein can be or should be used by the as- sembler or anyone else in place of or as an adjunct to professional medicai treat- ment or advice. Neither the publisher nor the author make any representations as for the completeness or the accuracy of the information contained herein and dis- claim any liability for damages or injuries, whether cau sed by or a risi n g f rom the I ack of completeness, inaccuracies of the in- formation, misinterpretations of the direc- tions, misapplication of the information or otherwise. world to listen to the heart beat of unborn babies in a mother's womb. Now you can listen to the characteristic Doppler sounds from your own heart which can be heard with an easily built Dop- pler ultrasonic stethoscope. It is important to note that this in- strument is for experimentation and entertainment. Piezoelectric background Transducers are devices which change one form of energy into another form. Some transducers are reversible, meaning they can change energy forms in either di- rection. Piezoelectric trans- ducers are reversible. They can change electric energy into me- chanical energy and mechanical energy back into electric energy. The quartz -crystal oscillator is a familiar piezoelectric transducer, which is used as a highly stable and accurate frequency source. Early phonograph pickups used piezoelectric Rochelle-salt crystals. Both quartz crystals and Rochelle-salt crystals are naturally occurring materials. z § m CD m 3 10 49 + 9V ii f a c — 2J|- TP1 TP2 4^ W^ » " R2 33K ;k C2 ^ 001 3"I0K 3-1 ?k C1 C6 ^ 33mF 33hF R3 100O R5 27k: R4 33K R8 4.7K 100O3- XTAL1 FIG. 1— THE TRANSMITTER CIRCUIT. Q1 is an RF oscillator whose 2.25-MHz frequency is determined by C4 and T1. A secondary tap on T2 provides a tow-impedance output to drive XTAL1 in the transducer. When either of those materials are excited by an applied voltage, they change in dimension or ex- ert pressure if they are con- strained from movement. When pressure is applied to these mate- rials, they generate voltage. One of the first applications of piezoelectricity was developed by Professor M.P. Langevin during World War I when he was com- missioned by the French to find a way to locate enemy submarines. He solved the problem by develop- ing an underwater piezoelectric microphone. About 50 years ago the first synthetic piezoelectric materials were developed. Today, commonly used synthetic piezoelectric ma- terials include barium titanate, lithium sulfate, lead niobate, and lead zirconate-titanate. Even quartz crystals can now be man- made. The stethoscope The basic component of the stethoscope is the transducer, which contains two lead zirco- nate-titanate piezoelectric crys- tals. One of the crystals is energized by the output of a 2.25- MHz oscillator/amplifier so that it expands and contracts at that frequency, setting up pressure or sound waves that are transmit- ted into the body. When that wave, which is very directional, passes from one medium to an- other in the body, a portion is re- flected back to the second crystal, which generates a voltage. If the reflecting surface is stationary. the voltage generated by the re- ceiving crystal has the same fre- quency as the transmitted wave. If the reflecting surface is moving away from the transducer, the re- flected frequency is lower than the transmitted wave. Similarly, if the reflecting surface is moving toward the transducer, the re- flected frequency is higher. By mixing a portion of the transmit- ted frequency with the received frequency, the received frequency is modulated in both frequency and amplitude. Using an ampli- tude-modulated (AM) detector, we can obtain an audio signal whose frequency is proportional to the velocity of the moving structure within the body. Circuit operation The transmitter circuit is shown in Fig. 1 . An RF-oscillator built around Ql operates at about 2.25 MHz. Positive feedback is provided from a secondary tap in Tl to the emitter of Ql. The fre- quency is determined by C3 and the inductive tuning of Tl . The oscillators' output is coupled through C5 to Q2, an inductively- tuned RF amplifier. A secondary tap on T2 provides a low-imped- ance output to drive the trans- mitter crystal XTAL1 in the transducer. The ultrasonic power generated is less than 15 milli- watts per square centimeter of transducer surface. The receiver and audio circuits are shown in Fig. 2. The receiver uses two identical stages of in- ductively-tuned RF amplifica- tion. The voltage generated in the y z o Be h- o LU _l LU 6 o < a: ~L™^_^ll_ ,x VJW2H3904 R10- 1CKV C9 _L R11 lOOii FIG. 2— THE RECEIVER AND AUDIO-AMPLIFIER. The receiver uses two identical ampli- fier stages, with a total gain of 1000. IC1 is a low-power amp which can drive up to two headsets. Bass boost is provided by R17-C18 as many sounds generated by the Doppler effect are in the low audio range, so reducing the gain at higher frequencies improves the signal-to-noise ratio. 50 receiving crystal XTAL2 is cou- pled to Q3 through C8, and the output of Q3 is coupled to Q4 through Cll. The combined RF gain for the two stages is about 2000. The modulated Doppler signal is detected by Dl to pro- duce audio frequencies in the 50-2000 Hz range. A low-power audio amplifier, IC1, can drive one or two head- sets. It has a gain of 100, which is set by C17— R16 with some base boost determined by C18— R17, as many of the sounds generated by the Doppler effect are in the low audio range. The volume may be adjusted by potentiometer R25 at the input of IC1. The output of the amplifier goes to Jl where the headset is plugged into. If two people wish to listen at the same time, a Y-jack can be used. For classroom demonstrations, an external amplifier with speakers can be plugged in. The transducer The construction of the trans- ducer is shown in Fig. 3. The two crystals of lead zircon ate- titan ate (Vernitron or Channel Industries PZT5A) are '/a- x '/i-inch rec- tangles approximately '/b-inch thick. Silver electrodes are depos- ited on each crystal surface, and a small silver trace is carried around from one side to the other side so electrical connections to both electrodes can be made on the same side of the crystal. Fine wire, number 36 AWG or smaller, is soldered to each of the elec- trodes using a silver-bearing sol- der to avoid lifting the silver electrode from the ceramic crys- tal surface. Those wires are con- nected to the terminals of XTAL1 and XTAL2 on the circuit board. Use a minimum of solder to avoid changing the resonance charac- teristics of the crystal. When dealing with ultrasound, the quantity of characteristic acoustic impedance is used in solving various problems dealing with waveform generation, prop- agation, and detection. Charac- teristic acoustic impedance w is defined as w=pc where p is the density of the me- dium in kg/m 3 and c is the sound velocity in m/s. The charac- teristic acoustic impedance is, therefore, expressed as FINE WIRES TO BOTTOM ELECTRODE TRACES FIG. 3— TRANSDUCER CONSTRUCTION. Silver-bearing solder is used to avoid lining the silver electrode from the ceramic crystal surface. Energy conversion is most efficient when crystals are "air-backed" resulting in energy being radiated from the front of the crystal. kg/m 3 x m/s = kg/m 2 s. To obtain maximum energy conversion efficiency, the crystals should be acoustically matched with the plastic panel. When two mediums are closely matched, most of the energy will be trans- mitted through the materials. When an ultrasonic beam meets an interface of dissimilar materi- als, more of the energy is reflected where there is a large difference in the acoustic impedance be- tween the two materials. The acoustic impedance of the crystals is about 30 million and that of the body is 1.5 million, with air being less than 50, all in units of kg/m^s. Because the den- sity of air is so much lower than that of the crystal, and the ve- locity of sound in air is much slower than in the crystal, almost all the energy is reflected at that interface when the back-side of the crystals are in contact with air. That difference in impedance results in most of the energy being radiated from the front of the crystal, and improved sen- sitivity of the receiving crystal. Just as you want most of the energy to be reflected at the rear of the crystal, it is desirable that most of the energy be transmit- ted at the front surface of the crystal and into the body. Be- cause the crystals are too fragile to be placed in direct contact with the body, they are cemented with epoxy to a sheet of plastic about '/ie-inch thick, which should have an acoustic imped- ance between that of the crystal and the body. This results in FIG. 4— THE AUTHORS' PROTOTYPE. Note that LED1 and S1 are mounted on the foil side of the PC board. The transducer is mounted on the end plate of the enclosure with its leads close to their solder pads. CRYSTAL SOURCES The Piezoelectric crystals (PZT5A) mentioned in this article can be purchased from the follow- ing sources: Channel Industries 839 Ward Dr. Santa Barbara, CA 93111 (805) 967-0171 Vernitron Piezoelectric Div. 232 Forbes Rd. Bedford, OH 44146-5478 (216) 232-8600 jjj m a m x 51 TP1Q I J ; TP1 O Q TP£ z O IT 5 < R3 \ £\ * 11 x X R13 r^i®/™ ;25 --C10- C26 — -R20. R21- FIG. 5 — PARTS PLACEMENT. Mount and solder all components as shown here. more energy being transmitted into the body instead of being re- flected at the skin surface. When gluing the crystals to the plastic, be sure to exclude any air from the interface and use a minimum amount of glue. Sheet acrylic or fiberglass such as that used for PC boards, or a rigid vinyl sheet all have suitable acoustic imped- ances and provide the required protection for the crystals. When more sensitivity is re- quired, a dab of ultrasound gel is placed on the transducer face to improve the impedance match and exclude any air that may be trapped between the transducer face and the skin. Water or miner- al oil will also work. Construction The authors' completed pro- totype is shown in Fig. 4. All the components, except the trans- ducer, are mounted on a single- sided PC board as shown in the parts placement diagram in Fig. 5. An etched, drilled, and plated through PC board is available from the source mentioned in the parts list, or you can make your own board using the pattern pro- vided. Note that LED1 and SI are mounted on the foil side of the PC board. The volume control is mounted on the component side with the shaft going through the hoard. Use two 3 /i-inch long re- sistor cutoffs and solder them to TP1 and TP2. After soldering the components on the PC board, the transducer is connected. The transducer is mounted on the end plate of the enclosure with its leads close to their solder pads. Insert the end plate and transducer into the slot on the top half of the enclosure and sol- der the transducer leads to their appropriate terminals. Now in- stall the 9-volt battery. The stethoscope is now ready for tun- ing after you plug in the head- phone. Connect a frequency counter from the emitter of Ql to ground. Then connect a DMM, set on the 10-mA range, between TP1 and TP2 and turn the instrument on. Your current meter should read less than 10 mA. Tune Tl to 2.3 MHz, then alternately tune T2 and Tl to reduce the current to a minimum. If you don't have a fre- quency counter, tune Tl for a minimum current between TP1 and TP2 and then alternately tune Tl and T2 for a lower mini- mum current. As the final cur- rent will be between 1 and 2 mA, use a lower 5- or 2-mA range when possible. After you have correctly tuned Tl and T2, turn off the instru- ment, remove the DMM and sol- der the leads of TP1 and TP2 together. Connect the DMM be- tween the cathode of Dl and ground, using the 5- or 10-volt PARTS LIST All resistors are "• s-watt 5%. R1, R10, R13, R17, R23— 10,000 ohms R2. R4— 33,000 ohms R3, R6, R11, R14, R20, R21— 100 ohms R5, R22— 27,000 ohms R7— 2200 ohms R8, R15, R24 — 4700 ohms R9, R1 2— 68,000 ohms R16— 270 ohms R18— 10 ohms R19— 27 ohms R25 — 5000 ohms, volume potentiometer Capacitors C1, C6, C16, C21, C24-C26— 33 jiF, 10 volts, electrolytic C2— 0.001 jjiR ceramic C3, C5, C8, C11, C14— 0.01 jjlF, Mylar C4, C7, C10, C13— 10 pF, ceramic, NPO C9, C12, C15, C1 9—0.047 jjlF, Mylar C1 7— 0.033 u.F, Mylar C18— 10 |xF, 10 volts, electrolytic C20, C23— 220 jxF, 10 volts, electrolytic C22— 0.022 |xF, Mylar Semiconductors Q1-Q4— 2N3904 NPN transistor D1—1N4148 diode LED1 — red light emitting diode IC1— LM386N low-power amplifier Other components T1-T4— MOS-E911 transformer (Sumida) XTAL1 , XTAL2— Vz x V* x 0. 035-inch PZT5A (Vernitron or Channel Industries) S1— SPST slide switch Miscellaneous: 9-volt alkaline bat- tery, PC board, miniature stereo jack, 16-ohm stereo headphone, and silver bearing solder. Note: The following items are available from Products & Pro- cesses, 9450 Mira Mesa Blvd., Suite #B-321, San Diego, CA 92126(619)566-0711: • A fully assembled and tested instrument with cassette — $189.50. • A complete kit of all parts (without battery) including an assembled transducer, PC board, headphone, assembly manual, case, and cassette with typical sounds — $135. • An etched, drilled, and plated through PC board— $8.50. • A pair of piezoelectric crys- tals— $39.50. • Four MOS-E911 transformers (T1-T4)~$12. California residents add 8 1 /<% sales tax. Add $5.00 shipping and handling. 52 Eli UStMiD Supplement to Radio Electronics, November 1991. Eutranics This Is An Advertisement WHO IS EASYTECH ?? EasyTech was established in response to the growing need tor a company dedicated to serving the Electronic Enthusiast/User. This means you, the Electronic Hobbyist, Student, Teacher, Engineer, Service Technician, Amateur Radio Operator and Small OEM. We have put together a broad range of products at prices that are competitive or lower than other companies in our field, while offering unsurpassed quality and service. Our group of employees has been in the electronics mail order industry for a total of 54 years. We are committed to creating an organization that caters to your needs. Our staff will ensure that you receive the best service available in this industry today, including 100% stock on hand at all times. If our supplier lets us down, we will ship the delayed item to you freight prepaid. You will see our two page advertisement inside this insert, showing a small portion of the products our company stocks. Over the months we will bring to your attention as many of our products as possible, while still maintaining as much information on each item as space allows. Please feel free to call or write at any time to request your free copy of our 1991 catalog. Subscribers to "Radio Electronics" will be receiving a free catalog in the mail during the month of July. Please call if you have not received your copy by August 1 st. Overnight orders will ship the same day at no extra cost to you. Unlike many of our competitors, we do not require a financial incentive to make this commitment. We wish to make this additional guarantee to you: All orders received prior to 3:00 pm (PST), will ship the same day. Should circumstances prevent us from fulfilling this commitment, your order will be upgraded to the next fastest delivery service at our expense. We are serious in our goals and commitments as we wish to serve you for many years to come. Gary Kennedy, President EasyTech, Inc. 2917 Bayview Drive Fremont, CA 94538 Order Direct: 1-800-582-4044 Fax Direct: 1-800-582-1255 m 33 54A CIRCLE 252 ON FREE INFORMATION CARD You Can Increase Your Knowledge and Income by becoming an EKI Certified Electronics Technician— whether you are starting or experienced. It you are looking to: D Obtain certification as an electronics technician □ Enhance your current knowledge D Change your career or advancement □ Have more hands-on training in conjunction with your current study [ Features: Excellent home- study program Immediate results A great value - NO CONTRACT to sign « Study at a pace thats right for you • 2-week trial/evaluation is available to qualified applicants FULL COLOR CATALOG CALL TODAY: 1-800-453-1708 16631 NOYES AVE IRVINE CA V27U ADVERTISERS INDEX RS # Page RS # 268 Accord Elect. Systems 54AT — 290 Ace 54AL.AM 274 21 1 Advanced Computer , . ..54N,0 — 213 Alfa Electronics 54AC — 249 All Electronics Corp. 54BB.BC 225 214 AUIroulcs 54BE 257 212 AUtek Computers 54AQ — 239 Alpha Ubs 54AX — 289 American Design 54Z.AA — — AndraTech 54BJ 226 273 Augat 54CA — 269 K.E. Ayers Associates S4BJ 258 261 Battery Store SOB 292 — Battery Tech 54T 227 — Beach Radio 50BL 259 288 B,G, Mkro 54L — 243 Boss Distributors 54Y 267 242 B & S Saks 54C — — BVC 54AT 228 216 Cable Plus 54BA 229 — Chenesko Products, Inc 54BN 236 217 Circuit Specialists 54AY 280 — CKy WideEnt., Inc 54AT 231 251 Command Productions 54X 232 218 Computer Business Mart 54AB — 219 Consumertronics 54AZ 270 271 Contact East 54AR.AS 279 250 Cool Amp 54BX — 220 Crestwood Products Inc. 54AJ — 248 db Computer Products 540 285 222 D & C Electronics 54M 260 286 Daetron 54BL — 221 Dalbanl 54AK 276 244 Danbar Sales 54BQ — 283 Darilyn 54CJ 233 252,253 Easy Tech 54A.V.W 234 223 Electrified Discounter 54AD.AE — 254 Electronic Goldmine 54BR — 247 Electronic Kits Int'l 54B — 284 Electronic Rainbow, Inc 54H 241 277 Electronic Surplus 54BV 235 — fair Radio 54BH 281 240 Gateway Electronics, Inc 54BP 266 — GAV 54AN 272 245 Halted , 54BS 236 224 Haltek 54CHX1 237 291 Hi-Tech Products 54BN 238 282 Hosfeit Electronics 54P 261-262 — Information Unlimited 54BW 263 — lnnotek. Inc. . . 54BZ 278 — INT'L Mlcropower Inc 54BR 265 246 Interactive Image Tech 54D.E 264 275 Jan Crystals 54AH 255,256 JDR 54J.K Page Joseph's 54BY Kelvin Electronics 54AO Lake Sylvan Sales, Inc 54BT L-Com, Tich 54BH Lesko , s 54B1 Less Buster's Electronics 54X Lindsay 54BL LJM.Inc 54AN Matrix North (U.S.A.) 54BH Mcndelson Electron ks. Inc. 54R.S, Mental Automation, Inc. . 54AJ Meredith Instruments 54 AB Midwest Laser 54A2 Ming Engineering Prod. Inc 54F Mondo-tronics, Inc 54BT Motron Electronics Co 54CB Mouser 54BD Movie View 54A1 MKW Industries 54BK Needham's Electronics . , . . , 54T New Sensor Corp, , . . . , 541 Optoelectronics 54AU Ocean State Electronics 54BO Pak Rat Electronic Parte MAN Paladin Electronics 54BT Parte Express 54AV.AW P.C. Boards 54BL PMC Electronics 54BD Premium Parts 54AJ Print Products Int'l 54BD Prizm Resources, Inc 54BU Rockford 54CB Rogers Specialists 54CG S & M Electronics 54AX Scscom, Inc 54AP Skyvision, Inc. . . . 54BM Smith Design 54BZ Somerset Electronics, Inc. 54BT Siartek. 54CC Surplus Traders 54CD TechServ Corp. 54AX TEC1 54BR Test Probes 54CE TSW Electronics 54BF.BG Tucker 54Q Ucando Videos 54BP United Electronics Supply 54U Viejo 54AF Viejo 54BJ VRS Electronics 54AH WPT 54AG Xandi .... MAP CIRCLE 247 ON FREE INFORMATION CARD 54B D OIL 1 lALc'l NO MICHIGAN CALLS ACCEPTED JERROLD 400 DRX-3-105 20 lot $38 \vV 10 lot $45 5 lot $49 DRX-3-DIC With Remote *£) MLD1200 2or3 25 lot 10 lot 5 lot $25 $29 $45 2 ^5 0RZ-3-DIC With Remote 20 lot 10 lot 5 lot $75 $85 $95 $69 kA^ $89 S.A. 8536 With Remote 20 lot $168 10 lot $182 5 lot $199 >/Vj_ INTERFERENCE FILTERS $8 *jV CRX6600 3-M With Remote 50 lot $&, 25 io. $9y$8^ $10 > v ■ « 15 lot Mj REMOTE CONTROLS FOR MOST CONVERTERS 20 lot $10 \J\^* 10 lot $12 x^gV $16 "l^JJT ¥\ f DUAL CABLE SYSTEMS^ JERROLD 450 DRZ-3WITHA&B 20 lot $58 10 lot 5 lot SA-3 $45 20 LOT TBA $45 20 LOT SA 8500-311 RAW, AS IS $45 In quantity NEW OAK X $35 20 LOT 90 DAY GUARANTEE — In order for the 90-day guarantee to be in effect, this form must be signed and returned. FOR VCR, SECOND, THIRD, ETC. HOOK UPS □ YES, I agree — all units are to be used with full service only. Signature Date HOURS: MONDAY THROUGH FRIDAY IO A.M. TO 5 P.M. Name. Address City. State Zip Phone No. ) IT IS NOT THE INTENT OF B & S SALES TO DEFRAUD ANY PAY TELEVISION OPERATOR AND WE WILL NOT ASSIST ANY COMPANY OR INDIVIDUAL IN DOING THE SAME. 771 E. 8 MILE, SUITE lOH, DETROIT, Ml 4B2EO 313-790-7896 m m 33 i CIRCLE 242 ON FREE INFORMATION CARD 54C The Electronics Lab in a Computer! OSCILLOSCOPE GROUND <£? TIME BASE TRLGSEA edge nm LEY EL K> .ODI |-3 .Z Or: i DI':| x pos lo .66 1 CHANNEL A |.: , l : . . d i v | CHANNEL B '.:. . £ , . D I V | Y POS 1" .DO 1 MLeiLIi]® V J»OS ffl .60 1 01 g z o - « ^ar t> I r_ L ■ ? ■ J :'■ KS OOOOOOOO oooooooo ■ ■VI Build and simulate both Analog and Digital circuits. Complete with simulated instruments. The Electronics Lab in a Computer! Feature Summary digital and analog modules in- cluded dual-trace oscilloscope function generator multimeter spectrum analyzer (Bode plotter) word generator logic analyzer logic conversion — truth I able to Boolean formula to logic gates complete control over com- ponent values Ebcrs-Moll bij unction transistor modelling — all parameters under user control Quinc-McCluskey logic simplification print circuit schematic, pans list, instrument readings, macros grid snap optional grid display optional display of component labels and values • user-defined models for all com- ponents • global component models refer- enced by name . block commands — move, copy, cut « supports over 150 printers — » user can define new printers . pan the workspace • rotate or minor parts • rubberbanding orthogonal autorouting wires • direct manipulation of com- ponents and instruments (click and drag) . zoom instruments for adjust- ment and reading ■ user defined [C macros for parts bin • customizable parts bins • customizable hypertext help system srtr^. Three Versions ■ Professional Version: uses color coding for circuit tracing with an unlimited* number of components; EGA/VGA support. • Personal Plus Version: builds circuits containing an unlimited* number of components. ■ Personal Version: builds circuits contiaining 20 components or less, ♦limited only by the amount of memory available Requirements • Professional: IBM AT or PS/2 or true compatible with 640 kB RAM; Microsoft-compatible mouse; EGA/VGA graphics: hard disk; MS-DOS 3,0 or later, • Personal/Personal Plus: IBM PC/XT/AT or PS/2 or true compatible with 512 kB RAM; Microsoft-compatible mouse; graphics display: two floppy drives or hard disk; MS-DOS 2.1 or later. Yes, I want Electronics Workbench® in my computer! Return to: Check the version you want: Name: D MS-DOS 5.25" □ MS-DOS 3.5* Professional $299.00 Personal Plus : $199.00 Personal i $ 99.00 Address:_ Cily: Tel: ( )_ _ State: Fax:( ). Zip: MC/VISA/AMEX# _ Si g nature : ORDER INFORMATION: Cwaddn roibMlB plu$'n.G$T).AJI»ife dfsoiav • A,|fimatrp«waf snm offtocon wve battery We • I to to W hours n' TpBrHlmn on a smqie av alkaline battery • 9V AC adapter Inckided • Lightweight at ant* 9 oz • Dimensions 3V«7*»J" Strip guessing with your ICs the NT ?t Handy Teste' is a complete stand alnne system whir h is portable powerful and a very affordable device tot IC testing and identifing either in- house or in the field r DIGITAL VOICE MODULE #DVM-58C$89 95 • Pacnrd and playback up to ? minutes of your message on optional 4Mb o» DP AM (3?K bps) 1 Meg DRAM included. • Up to i<5 variable- length messages -each w'dit art trigger • Very low standby currant only e mA w'4 Mega DRAM. • "FN0< F" X fPV DIGITAL VOICE PROGRAMMING TOOL #DVMP $495.00 This programming tool is designed to be used with your existing FPROM programmer for the pur pose nf program mi ng voice data onto FPROM iC's for digital voice modules such as the #0VM- ?804 T— — — *Vt MAIL QRDFR5 977 S. Meridian Ave. Alhambra, C A 91803 FAXORDFBS (818)576-8748 TFCHMICAL SUPPORT (818)281-4065 ALL PRICFS SUBJECT TO CHANGE WITHOUT NOTICE VISA *** 4 OtSC-VFD pflg Orr r tarts JVCF PTFO *«EnV T ouapoes *no JPS Smind S STf Second day fttliml Ulf NnHOtvfmtil S"irio C O p ADO S * no r. *j if RFSIPSfi s Ann s ww sjmw *1X CANADIAN OROERS AH orden "hh' to* PREPAID ijy .-hurl «r cadn cam (VISA. MC) Add * Hat rat* at ust is no (« lhipp»ng «nd handling by U S POST OFFICE (sir) WF CIRCIE 2?7 ON FREF information r app Computers, Components, Tools And Supplies 3931 Edwards Road express order line - 1 (800) 423-4499 - orders only please Cincinnati, OH 45209 technical support / information - (513) 531-4499 32 32 32 si 34 40 40 % 32 34 H 61 54 .54 54 54 .54 54 .54 54 M .59 32 42 56 $4 54 as u t-24 I 24 I'S 1.24 154 32 s 31 32 l IS 134 t 34 54 56 .54 l M 2.29 2. as 8s 64 I .87 .73 93 m 1.43 .54 60 .60 2.09 1.29 54 60 65 00 .60 ■a .67 1.55 3 59 in 1.09 2.59 1 29 139 64 .64 1 59 69 .a? --33 209 .59 79 59 109 4 00 1.59 5.95 3 49 2.30 3.49 349 1.10 144 1 44 99 99 1.24 124 99 1.00 2,60 ISO 74221 74246 74247 74248 74249 742$1 m 74273 74276 74278 74279 74263 74254 74265 74290 74293 r. ;:-.■.'! 74351 74365 m 74366 74376 74390 m 74426 74448 74490 1 80 4 95 38 495 1.00 !£ 2 95 2.09 4.00 4 00 109 1 59 LIS 250 .57 .57 67 .57 2.70 230 1.50 495 74LSxx MLSOO 74LS01 18 74L502 vt 74LS03 74LS04 .30 TO m $1 74L509 -VI flffil 74LS12 .30 .34 34 74LS13 as 74LS1* V 74LS15 35 74LS19 47 30 34 34 * .40 30 30 :ffi .40 34 45 ifl 2.95 30 .34 34 89 .40 34 I .59 .65 II .52 C.5 55 ,,, £-.-. 65 45 ■ia ■if; 45 45 50 5-1 5 J s: s! .50 .52 .52 69 159 69 52 52 1 69 59 65 47 35 38 52 65 S .87 .79 .52 .3 495 •4LS293 74LS366 74L5367 741 S368 74LS373 --M5J--1 74LS375 74LS377 74LS37S 74LS379 7JLS3VM 74LS393 741.35^ 74LS540 74L5641 74LSS43 74LS545 25LS33 25LS2518 74S240 74S2.1I 74C192 74C193 1.18 1.19 1.19 300 59 79 79 3 59 59 59 99 .99 109 99 59 59 59 109 1.39 1,19 1 19 139 1,59 T,5 39 39 45 69 39 45 59 209 129 1.69 600 550 159 125 1.69 1.69 ,59 2 59 160 1.69 2 80 2 19 1.09 1.09 4 50 14 00 1995 74HC2S3 74HC244 yam 74MC3F4 74HC390 J4HCSM 74HC573 I 74HCSSS 74HC401 7 1 74HC4020 1 74HC4024 1 74HC4W0 74HC4049 74HC4050 74HC4060 74HC 74HC463E 2 II DO 74HC22I06 10.00 74HCTXX 74HCT00 HCT86 .HOT 123 7.;Hr.7CS 74RCT10 74HCT1 1 74HC714 r 4H6TJ0 74HCT27 74HC730 74H5T32 74HCT73 '4HCT74 74HCT75 74HCT95 7 *l 741 74HCT125 74HCT136 74HCT139 741tCT]51 .39 74HCT154 2,60 74KCTI.57 ■ 59 74HCT156 69 74HCT181 99 74HCT164 59 74HCT165 1.29 74HCT165 1.09 74KCT173 74HCT17J 74HCT1J5 74HC1193 74HCT194 55 74HCT237 59 7JHCT23S .79 74HC1239 69 74HCT240 99 74MKT241 69 a 99 74HCT243 99 74HCT244 99 74KCT245 99 74HET251 51 --. 74HCT259 79 74HC1273 99 74KCT299 1 29 74HC7367 69 74HC1373 59 74HCT374 99 74HCT377 99 74HCT393 99 74HCT670 1 09 74HCT4017 1 29 74HC 74020 1 29 74HC14540 l.M 74HCT4060 129 74HCT4538 129 4000 4000 4001 ixs 4007 4009 4009 4010 4011 4012 4013 4014 4015 4015 4017 4018 4019 4O20 4021 4022 4023 4024 4025 4026 4027 4028 4029 4O30 4031 4032 4034 4035 4940 4041 4042 4043 4044 4045 34 £ 55 59 ,79 79 .49 139 1 39 1 39 1.09 4045 4047 4046 4049 4050 4051 38 -555 4060 4063 4065 4069 4070 4071 4072 4073 4075 4078 4081 4082 4093 4094 40106 40107 4501 4502 4503 4507 4509 4510 4511 4512 4514 4515 4516 4516 4519 4520 4521 01,1335 UK LH337T LM33BV. LM339 LF347 4527 4525 4529 4531 4532 4534 4535 4539 4541 4543 4552 4553 4555 4556 4555 4560 4691 4596 4569 4572 & 4594 4585 4702 4724 14174 14175 14409 14410 14411 14412 14419 14433 14451 14490 14497 LINEAR TL.061 TL062 TL064 m TL072 TUJ74 noei TL082 TL083 715084 LM153K LM207 UMSM LM301 LM307 LM309H luxbk LM310 LM311 mt LM317K LM317T LM31S I M319 LM322 LM323K LM324 LM325 LM329 LU331 45 34 34 79 79 49 1 39 i 39 .70 70 65 .99 59 1 19 1.19 .79 79 79 1 19 1 69 79 79 79 79 1 19 -99 89 99 89 '3S 1.19 5.00 .99 1 19 1 19 1 19 1.35 *% .79 1 69 3.50 2.00 200 299 90 1.69 1.69 69 .79 10 99 1 19 .60 50 13 99 7-59 10 99 7.59 550 750 1% 795 mi LM2900 LM29Q1 LM2907 ; a»i ' GA901I asm i UC4044 HEGULATOH njug 79MG LM3I7T LM317K LM323K LW33A LM337T il.r.-> LMsjSdK LM350T LM723 MC1723CL 7805 7SL05 75M05 78H05 7805KC 7506 i DO 1 03 ,79 i "'J ■! Li3 -J5 i 19 -, si ■1 '.'■: 1 05 55 1 M 50 59 -'> m 5S 78L62 78U05 Si 7B08KC 7810 7812 78L12 76M12 78H12 781 2XC 7515 78L15 7915XC 7518 7818KC 7524 7S24K0 79M05 7905KC ™ 7906KC ■_:.;- 7S08KC 7912 79L12 79-2KC 7916 791.1 5 7924 7924KC 6000 SERIES 6502 425 55C02 6 25 4.25 5 25 4.25 525 2 19 269 4.25 4 50 3.25 59 49 59 '.* 59 .59 49 60Q 1.50 59 .59 'a 1.50 J9 1,50 .69 .79 ,59 6S409 8521 85A21 6840 85440 65A45 8850 6575 66S2 3000 SERIES 9031 6035 S03B sax £J^5j ::'552.-.h 6060 8080A 9095 9065A-2 8096 Bpee BOBBA ■ota ■ 80882 ;^ 8155 6155-2 8156 US 8203 9203-3 8211 8212 9214 8216 9224 82244 8226 8228 8237 gi, S 8242 8243 8250 8251 A 62C51A 8253 425 2.19 2 19 2.19 2.29 35.00 525 5.50 4.25 525 6.25 10.00 525 6.50 10.00 800 14.00 40,00 4J5 5 25 5 25 tO^OO 18.00 t6.50 300 3 25 4.25 1 69 3-25 3 50 sis 4.25 4 25 5-25 3 00 325 7.25 m 425 219 Heathkit Closeout Deals... Genuine Hetthfcil Kits tyaofl n**. . Tlvs is ■ rare on* bma opportunely lor Iheie p^oducli only... Dan Una Proleclor Kit SK202 Skill Lovel 1 ■ Eisv btgvinn Idl to hal^ prated yajf RS232 C lines irom voflaoe ipfcei and alabc charoa builOups B/oHM>uf price! ..„ _ 3 forSW.OO Baud Rale Analyzer KH SK205 - SMI Laval l ■ I .raja* batwean 300 and 36-4K - Diaplan baud ... Of 3 con.'flurfl!lon eo% em pm 2 $19.99 Hot New Motherboards... 2se 20. o wait - Amu bios (QK) si 19.99 MSSA5-20 - ACER AMI BIOS <0K).- $259.99 186 33. wait • VLSI .'AMI (OK) $469.99 82532 62535 82CS3 82C55 8255A-5 8256 8257 ,5 8257 5 3.75 8259 2.19 425 395 425 ^ 525 2.79 350 350 326 14.00 3.25 8259-2 3rta 5 8271 S272A 274 8275 8278 S2?9 5 8282 8293 8284 8289 £.-.■ 8292 8741 8741 A 8742 8745 m 6755A 350 325 49.95 5.25 10.00 20.00 4.00 m 4.25 5.25 279 4 25 525 10.00 10.00 20 00 10.00 1200 20.00 9,95 11.00 24 95 26.95 ZILOG ZB0BCPU 3 25 Z80A CTC 2 19 2TCA 5!0 5 25 28007 10.00 ZS036 8.00 28681 5 00 5 55 4.95 4 25 425 ' 395 4.50 425 4.75 425 395 4 25 4 25 450 EPROM 1702 2516 2706 2716 2732 2732A .-:::a 200 2764 2784-300 2764A 2784A-250 2764A-200 27C64 27C64-200 S70B4 ■'<: 27128 27128A 27128A-200 5 25 27126A-150 550 2?C126 5,25 27C128 150 6 25 27256 5 25 2725&200 5.25 27256-150 6,50 6.25 27512 5 25 27C512 7.25 27C512150 8.25 27C101-2OO1S.95 CLOCK CHIPS MK50250 300 MK50395 3.00 MM5311 5.00 MM5312 5 00 MM5368AA 200 MW5359 279 UM5375AA 435 MU5375AB 4,05 V.'iiB'iOU 5:5 UM5S167A 12 00 UM73I7 5.00 MSUS532 350 SRAM 2101 5101 2102 2111 2114 fMS4044 UK4118 5 4016 6116 61161.P.2 6264LP 15 6264LP-12 2064100 ijg 3 93 •a 2 43 3?T ?55 4 :■■. 4 25 5 25 6 25 A TO Q AOCOSOO 20.00 AOC08O4 325 AOC0B09 4.25 SSSSf S:So ADC0831 5.25 DTOA nAcow OAC08D3 D4C1021 04C1022 2.19 2 13 ,m B.0C 5CO COMM. CHIPS 2661-2 2861-3 INS8250 H Si 6450 US 16550 AY-5-1013 -"11 10.00 i -5 5 5' 11.00 18.95 4 25 425 1000 7.00 10.00 .79 79 1.00 1.00 1.09 111 225 2^0 225 79 1J0 : 03 109 1 50 3 25 .75 4.00 TRANSISTOR PR!4f_ -RiO'ire O7201C 6402 CQU8118 WD1943M OPTO 4N25 4N2S 4N27 4N26 4N32 JN33 4N35 4N37 4N45 6N136 ON! 37 HP3700 MCT-2 MCT-S TIL 1 1 1 1IL113 IL-1 ILQ-74 H13A1 H21A3 WPSU02 VN10 O40N5 041 K2 D42C6 SpB7 3N200 3310 WJE340 ms 2N404 2W697 MM) UfSsnt WJ1DO0 2N1678 NE02136 2142215 2N22I9 F*I2222 2N2222 ! 13 1 IS 1.00 50 500 75 100 8 25 300 50 .70 '3 150 50 1.00 MPS23S9 2N2905 2W907 ECI1S55 30551 2H30S5 2N3393 I4PKS401 2N3417 9B439 2r73557 2NT — lap wswi?" '■:. B43 !.'('S.3 70.> 2N3703 2N3704 2N3706 ?M3?J5 2N3772 2N3S-:e 2H3903 210904 2M3O05 IP 2N4123 ^:ji;20 JN4:-;c 2N4240 2N4365 2H4401 2M4402 SffiS 2N485f 71 1 15 1 3 2N4W2 ;:i-5s- 2N510S ;-N'--:.5 m .-M5S15 2 N 564 3 :!i:575 JNI03- 7:11514^ 2MH 16 2NSI07 2N6124 2N6251 2N6292 F3FJ55-3 2N6719 MJ1 1032 WJ 14000 40348 M^ os MPSA06 MPSA 13 MPSA 20 MPSA 42 MPSA 43 vit', 58 MPSA 56 MPSAS5 MPSA- 70 MPSA 92 MPSA 93 TIP29 TIP30 TIP31 TIP32 TIP48 TIP105 TIP1I0 TIP112 TIP122 TIP125 TIP127 TIP141 TIP146 TIP2955 29 50 25 20 1 50 59 85 35 25 40 150 55 7-5 25 25 7.5 50 IB .30 70 20 20 I 50 30 1 00 50 30 30 2 1 10 30 .25 30 150 35 50 SlITso I 53 503 2 00 2.4" 1 55 1 95 1 10 1.00 400 1 10 .20 1.95 2 25 .50 3 .30 1.1. ! 53 1 99 PUii. Thouwnds Of OKM rj MM resJslor*. cn/iti IS Super Mouse Blowout... 2 Button Logitech Serial Mouse „ $15.99 Power Supply Bargins... Brand new ft#«i-y dufy tineats from Power One and Universal... »CC LV12-5VO6AI12-15V«>2.5ADC0u»1outB 12A EC HD48. JOA 49V 9 3.0A 0C your Choice... „ $19.99 Software Deals... Compress your LOTUS lite* to a manageable soe SQZ from Symantec $9.99 Note: All prices and aval [ability are subject to change without notice CIRCLE 248 ON FREE INFORMATION CARD 54G RAINBOW KITS I LASER KITS RADAR SIGNAL DETECTOR It you think that a sen- sitive radar detector is a complicated piece of equipment, lake a look at this new kit. This simple, yet effective, detector circuit can be built »n lea* than an hour and can be tuned to respond to signals between 50MHz to SOOGHj. It's a fun kit to build and play with. A cigarette lighter plug is included. Size ^"xy^" operates on 9 to I5v DC KITRSD-1 $12.95 STROBE LIGHT If you need an alteniion getter, or warning light, you need the strobe light kit. Uae it for emergency light tor autos, for model planes or radio lowers. Even use it on your bicy- cle, Operates on 6 or 12v DC and has a variable strobe rate KITST-1 $8.95 DIGITAL THERMOMFTEfi Have you ever wanted to tell temperature changes fast & accurately? The DT-1 kit will turn your digital volt meter into an accurate digital thermo- meter with .1 degree res- olution, it gives you a 250 degree window with a range frorn -40F to 300F degrees. It has a remote sensor ,25" aq. mat can be mounted many feet from the meter If need be. KIT DT-1 $8.95 BUNKEY LIGHTS Wan I to attract atten- tion? These hits are perfect tor decorating name tags, lighting up your hat, or flashing lights for your model trains. Some people use tfiem to simulate a burg- lar alarm for auto a Put It in a box,, set it on your dash and It looks tike the real thing. Each Kit con- tat na two LED? that alter- nates fleshing. Operates on a 9v battery. Size •5*'K.5" K1TRB-2 $3.45 CAPACITANCE METER This easy to build kit will turn your digital volt meter into a CAPACITOR METER. Turn that junk box of unmarked capaci- tors Into a fortune. Meas- ures capacitors from PpF to 2-2uF. Operates on ■ * battery. Size 1.75 "x2" K1TCA-2 $12.95 WIRELESS EM MIKE Small but mighty .B"xV PCB, will really stomp out a signal well over 400 yds. This is a buffered wireless mike that oper- ates on SO to 120 MHz fm Comes complete with a microphone, and 9V battery connector. Operates on 6 to I2v DC. KtTWM-1 $12.95 SI PER SNOOPKR-BHJ EAR Use this BIG EAR ampli- fier to listen through walls, hear conversa- tions across the room. Beef up the sensitivity with a parabolic reflector and hear blocks away. Due to the size, the 8IG EAR can be hidden about anywhere. Use the ear- phones from a pocket transistor radio to listen. Makes an ultra-sensitive Intercom. Can also be used as a general pur- pose t,5W amp. We sup- ply a mlm-mlcrophone in the kit. You can also use any & to 45 ohm speaker. Operates on 6 to 12v DC. Size r¥l.75" K1TAA-1 $10.95 AC UNE MONITOR This Is something every computer user, photog- rapher, or anyone that must maintain a safe usable AC line voltage should have handy. Mon- itor the voltage ol your motor home's 110v AC generator inside ihe motor home. Every tech- nician's bench needs this item. The AC line monitor will indicate, with multi-color LEDs, what voltage is being distributed to your equipment at that par- ticular outlet, KITLM-110 $10.95 m&i UV BATTERY MONITOR Have you ever been In your car, boat, or camper — you try to start your motor but the battery is dead? The BATTERY MONITOR kit uses ihe cigarette lighter plug outlet to monitor the true battery voltage. Multi- color LEDs indicate the voltage in 1v steps from llv to t5v, green means great, yellow is good, and red — call the tow truck or gel out the oara. Size 1.2"x1.75" KITLM-12 $5,95 PHONE BUG Small but mighty, so small it fits anywhere. Telephone Nne powered, never needs batteries. Transmits both sides of a phone conversation loud and clear, wireless, to any FM radio at great distances away. Variable tunes 70MHz to 130MH2. It can asao be used to make any phone a speak er phone. Size .55"x1" KITTEL-B1 $10.95 PHONE RECORDING SWITCH This telephone line powered switch is small enough to install any- where only 9"x.6'\ Every time someone picks up the phone the tape recorder will record both sides of the conversa- tion automatically. Use it In your office to record all phone conversations so you don't lose that Im- portant address you wrote on the back of an envelope. KIT TEL-SW1 $10.96 BUSY PHONE LIGHT Add this little kit to any or all of your phones. When any extensions are in use the LED will light. Uses a 9v battery, P,C. Board 1"x\*". Complete with etched L drilled PCB, all parts and sche- matics, KIT TEL-LIT-1 $9.95 VOICE ACTIVATED SWITCH This vox can be used to operate a tape recorder, ham radio, CB radio. Use it to turn on an alarm. The output can operate a load up to 100ma. It will operate a relay, lights, motor, or LEDs. What could you do with a sound activiated switch? Sue 1.5"xl.2S" KITVOX-1 $6.95 UE DETECTOR This xit can be great tun at parties. Lie and an audible tone will change, the more you lie the more the tone changes. When you lie your palms & forehead sweat. This kit allows you to meas- ure these changes. Only a very slight amount of change will cause the tone to increase in fre- quency. Operates on 6 to 12v DC. Size KIT LD-1 $9.95 Laser Switching Power Supply Kit, input I2V DC .75-1.25A. Output 2 to 3 KV at 3-4.S MA, trigger voltage of appro*. 8-10 KV. Complete with 6. 25" X 2.25" printed circuit board, schematic and all the (Tarts. LPS- 1 $59.95 IMW Laser Tube, NEW Mini He-Ne 1.125" dia. x 5.75" long, perfect for experimenter* and laser projects. Works great with above power supply LPS- 1 . UMW-1 .539.95 Mirror and Motor Kit— This unique kit allows you to project Lissajous patterns on walls and ceiling. Change the pattern by changing the speed of the motors. Comes complete with 2 motors, front surface mirrors, motor brackets, rheostat control to control HI motor, and high power resistors lo use on #2 motor. MM-2 S19.95 * •K + * * * * * * * * * * * * + * * * * * * * • SPECIAL • Laser Power Supply Kit LSP-1 IMW Laser Tube L1MW-1 Mirror and Motor Kit MM-2 ALL 3 FOR $99.95 9V 100MA rechargeable Niead batteries. This 9V Ni-cad is truly a 9V not the standard 7.2V you're accus- tomed to. Use over and over, NEW $4.00 ea. 10/S29.95 9V battery charger kit. This kit is a must when you buy °V Ni-cads, charges 2 batteries at once. Use on 1 10V AC or with a 12V DC cigarette lighter plug which is included. Comes complete with parts, P.C. board, housing and schematic. CH-9V $19.95 THIS MANUAL CONTAINS ALL SCHEMATICS, PARTS & P.C. BOARD LAYOUTS FOR ALL OF THE RAINBOW KITS. USE YOUR OWN PARTS TO CONSTRUCT ANY OF OUR KITS, KIT BOOK $14-. 95 $5.00 OFF IF YOU BUY ANY KIT. A******************************** TV NOTCH FILTERS OUR TV FILTERS ELIMINATE UNWANTED TV CHANNELS OR ANY INTERFERENCE THAT ALTERS BOTH THE SOUND AND VIDEO. Channels available 2 thru 6 & 14 thru 22 Specify a specific channel when ordering M HO NOTE: >!' rv fmtt W1»#r#iekj loraducilwuj pu*pa*«4only fov fnuil o&uin jH-mit- from yov local c*Wi wnpMj* btltf* ui.ng iht » IHian on >iuf c»blf tr*!«m CHOICE 14 95 EACH * 1r*^*ir****lrk*irk*ir1rk*1rk+ir*1r**ir1r*ir* J PIbssa «dd suli.cienl postage "¥■ W« wlM iccept telephone order} for Vila & MtiUrci"! * To Order Call 317-291-7262 * [ELECTROniC RflfflBOlU 6254 LaPas Trail • Indianapolis, IN 46268 54H CIRCLE 284 ON FREE INFORMATION CARD VACUUM TUBE DEALER PRICE LIST (MAY 1991) SOVTEK, USSR $2.60 each 12 at $2.25 each 25 at $1 .75 each 3,90 3.35 2.95 4.50 3.95 3.65 50 CALL FOR SPOT QUOTE 6.75 6.20 5.75 100 CALL FOR SPOT QUOTE EL84/6BQ5 6V6GT 6L6GC 5881 /6L6WGC The 5881 is Russias selected military 6L6WGC and regarded as the very best 6L6 type in the world. Eric Clapton recently replaced the Philips/ Sytvania 6L6 STRls in his custom Soldano amp which he uses live, with SOVTEK 5881 s because of their milky smooth sound. Discriminating musicians thruout the world are retubing with the SOVTEK 5881/6L6WGC. 5U4G EL34 6L6GC 12AX7a 12AT7 6146B 6550 KT88 EL34/6CA7 SDJ8 12AU7/ECC82 12AX7/ECC83 EL34 5U4GB 3CA7 3L6GC 3LF6 12BH7 12AT7 12AX7a SINO, CHINA $4.60 each 10 at $4.15 each 25 at $3.75 each 5.70 4.80 4.25 4.70 4.20 3.95 3.85 3.35 3.15 3.90 3.40 3,30 12.50 11.50 10.50 9.40 8.95 8.50 13.50 12.25 El, YUGOSLAVIA 10.95 $5.10 each 10 at $4.65 each 25 at $4.10 each 3.25 2.95 2.65 3.15 2.80 2.35 3.15 2.75 2.35 SIEMENS, GERMANY $7.25 each 10 at $6.75 each 25 at $6.20 each GE $11.85 each 10 at $11.25 each 6550a 14.95 13.50 7025 14.95 13.50 7027a 19.50 17.95 7591a 9.95 9.50 7868 6.85 6.40 8417 4.95 4.40 100 CALL FOR SPOT QUOTE n It 1 00 CALL FOR SPOT QUOTE 1 00 CALL FOR SPOT QUOTE $17.95 each 14.75 16.95 14.75 16.95 15.75 10 at $16.50 each 13.25 16.25 13.50 16.25 14.25 SOLID STATE RECTIFIER Built into tube socket. Direct plug-in replacement for all 5Y3, 5U4 and 5AR4 types. $6.25 each 10 at $5.90 5AR4 $7,95 each 6BA6 $2.25 5BC3/9 1.95 6BK11 7.90 5V4GT 5.50 6C4 2.50 5Y3GT 4.95 6C56T 2.75 5AL5 2.75 6C10 4.50 5AN8 4.95 6CA4 3.50 5AQ5a 4.25 6CG7 6.90 5AT6 3.25 6EU7 11.80 5AU6 2.50 6FH8 10.90 5AV6 2.50 6GT5 14.75 5AX5 4.90 6GW8 6.90 ODD BALL TUBES 1 6J5 6J7 6K11 6SC7 6SG7 6SJ7 6SK7 6SL7 6SN7 6U10 6X4 (MOSTLY USA STOCK) $4.50 each 5.50 6.90 6.90 3.50 4.45 3.15 4.35 5.45 4.90 3.75 6X5 6X8 12AY7 12AZ7 12DT8 12DW7 12FQ8 57 5749 $3.90 each 2.25 5.95 3.90 4.95 12.95 4.75 1.50 4.75 6189W 3.80 each (12AU7W industrial) (6BA6W industrial) 5879 $6.50 6973 7189 7199 7247 QA2 OA3 OB2 OC3 4CX350A GIVE US A CALL ON ANY TOUGH-TO-GET TUBE. WE'LL FIND IT FOR YOU! ALL TUBES GUARANTEED! QUANTITY DISCOUNTS AVAILABLE! 11.90 7.90 17.80 11.95 2.75 1.95 1.50 4.75 139.00 CONTACT: MIKE MATTHEWS MINIMUM ORDER $50.00 ADD $5.00 SHIPPING ($10.00 OUTSIDE UNITED STATES) SEND CHECK OR MONEY ORDER TO: NEW SENSOR CORPORATION 245 EAST 63RD STREET, SUITE 526, NEW YORK, NY 10021 TELEPHONE: (21 2) 980-6748 TOLL FREE : 1 -800-633-5477 CIRCLE 230 ON FREE INFORMATION CARD FAX: (212) 753-7340 541 16MHz MINI 386SX $ 349? 5 • NORTON SI XM.3 • LANDMARK AT SPEED 20,8 • EXPANDABLE TO 8MB ONBOARD ■ AMI BIOS • CHOOSE OF 1 WAIT STATE FOB USE WITH SLOWER RAM • FWE 16-BIT AND THREE 8-HrT BLOTS ■ CHIPS 1 TECHNOLOGY "NEAT" CHIPSET ■ SOCKET FOP B03S7 CO- PROCESSOR ■ 9 5" X 13" SIZE FITS HIM: 286 S FULL SIZE CASES MCT-386.SX 16 MHZ386SX $349.95 MCT-3S6SX-20 20 MHZ VERSION $399.95 MCT-M386-2525MHZM1NI386 $699.00 MCT-3S6MBC-33 FULL SIZE 33MHZ CACHE 386... $949.00 MCT-3B6MBC-25 25 MHZ CACHE 386 $899,00 MCT-486MB33 33 MHZ (LANDMARK - ■151.0) $1,895.00 MCT-486MB25 2S MHZ VERSION $1,495.00 - NORTON SI 14,0 • LANDMARK AT SPEED 1S.9 • 6V12MK2 KEYBOARD SELECTABLE SPEEDS -EXPANDABLE TO 4MB ONBOARD USING SONS 256K OR 1MB 5IMMSK3K INSTALLED) ■ FIVE 16- BIT AND THREE S-BIT SLOTS • AMI BhOS ■ SOCKETED FOR 80287 CO PROCESSOR - 8.5" X 8 75" SIZE FITS M 11*286 AND FULL SIZE 296 CASES MCT-M286-1 2 $1 79.95 MCT-M286-16 16MHZ VERSION „ $199.95 MCT-TURBO-10 10 MHZ BOBS $99.95 UPRIGHT CASE $249" ■ FOR STANDARD. FULL SIZE AND MINI- MOTHERBOARDS ■ 250 WATT POWER SUPPLY (11 *a0V) I ■ MOUNTS FOR 3 FLOPPY AND 4 HARD \ DRIVES • TURBO AND RESET SWITCHES - SPEED DISPtAY. POWER, DISK LEDS • INCL. MOUNTING HARDWARE. FACEPLATES AND SPEAKER CASE-100 $24B.95_ MORE CASES... CASE-200 UPRIGHT HOLDS 11 DRIVES $499.95 C ASE-1 20 MIN I ■ UPRIGHT W/200 WATT PS . . $1 99.95 CASE-70 FULL-SIZE 286-STYLE CASE ..$99,95 CASE-50 MINI-SIZE 286-STYLE CASE $39.95 CASE-FLIP FLIP .TOP BOBS-STYLE CASE $39.95 CASE-JR MINI-SIZE CASE WITH 200W PS ...-..$149.95 f SYSTEM DIAGNOSTICS CARD $4095 WORKS WHEN SOFTWARE pANNOT 286/386/485 COMPATIBLE PLUG INTO SLOT. READ LED DISPLAY AND CHECK YOUR BIOS MANUAL FOR ERROR CODE VIEW LEDS ON-BOARDOR ON BACK-PANEL I PCOOE — $49.95 PCODE* INCLUDES QA. VERSIONS 12 $69.95 I GATEKEEPER 8 B'T PASSWORD SECURITY CARD $49.95 MEMORY CARDS [MCT-EEMS UBITEEMSCARO $149.95 MCT-AEMS IE BIT EMSCARD(USES 1MB DRAMS) $129.95 MCT-EMS 8 BIT EMS CARD 2MB CAPACrTY $129.95 (MOT-RAM 8-SrT576K RAM CARD $49.95 DISPLAY CARDS i MCT-VQA e.'16-BIT 640X480 VGA CARD $149.95 MCT-VGA-1 024 1024X768 VGA CARD $159.95 MCT-VGA-1024+ 1024X768 IN 256 COLORS $199,95 [MOT-MOP MONOGHAPHICSPRINTERCARD $49.95 &> Seagate «"-■»« 42MB $219 FO*M MOOfl SI7I KMHWI AVC. SJTU huce 3-1 tV ST-1I5A zmmb 5-1/4" SI-MS 21.1MB 3-1/J- SI-nsA 311MB 3-I/r ST-1JBN 312MB j-l/r ST- 138* 32.7MB IDE MFM IDE SCSI RU. ,■■-•/> 28MS 2«MS 06MS I1W tiw "30- $259 $24* 5-1/4* ST-1M 3X7MB 5-1/4" 5T-I5M 415MB M/r ST-IS7A 44.7MB 5T-157N 4iUiMB 5-1/4" ST-277-1 45.5MB RI.L MFM IDE scsi P.LL 6JMS 2SMS UM£ J3I9 S349 sm $1B9 5-1/4" ST-40-* 802MB 5-1/4" ST-396N S4 SMI 3-1/2" ST-1I03A K9IMB SI-M44A I3IMB 3-l/r ST-I201A 177MB MFM SCSI IDE IDE IDE ZSMS 19MS 19MS 15MS $3*9 S)91 $491 $74* 8-1/4" ST-MH FLOi FDD-1. FDD-1. FDD-31 MOVNTtm KIT FOR 3-1/2' DRIVES W _ ......... - ..$9.95 V) o z s PPY DRIVES 44X 1 44 MB HD BLACK FACEPLATE 44A 1 44MB HD BEIGE FACEPLATE $79.95 $79.95 $69.95 FDD-1 .2 5-1 Hf DOUBL E SIDED H FD-55GFV TEAC 5-1/4- DOUBLE- $89.95 -> 91 SIDED HD 2M $99.95 ED 6 - HP IDE FLOPPY/HARD CONTROLLER *29 9S • SUPPORTS 2 IDE HARD a 2 FLOPPY (360K. 750K, 1 2MB 6 1.44MB) DRIVES - HARD DISK ACTIVITY LED SUPPORTED MCT-IDEFH $29.95 1.44MB FLOPPY CONTROLLER *49 9S ■ SUPPORTS 2 FLOPPY (360K. 720K. 1 2MB 41.44MB) DRIVES • SELECTABLE AS PRIMARY OR SECONDARY DRIVE CONTROLLER MCT-FDC-HD $4955 MCT-FDC-HD4 J floppy version $59.95 MCT-HDC HARD DRIVE CONTROLLER $79,95 MCT-RLL RLL HARD DRIVE CONTROLLER $89.95 MCT-FAFH IB-BIT 1:1 FVH CONTROLLER $149.95 MCT-AFH-RLL 16-BIT F/H RLL CONTROLLER . . .$199.95 MULTI I/O CARDS MCT-VGAEIO MONO MULTI I/O, IDE F/H CARD .5299.95 MCT-1DEIO 1 6 BIT IDE MULTI I/O CARD $69.95 MCT-AIO 1-BIT 286/366 MULTI HO CARD $59.95 HCT-IO 8 BITB088 MULTI I/O CARD $59.95 1024 x 768 VGA PACKAGE - 8088 " 2fll.-386-'4B6 COMPATIBLE CARD 4 1024 X 768 INTERLACED MONLTOR • 1:1 ASPECT HATIO • 0.21 DOT PITCH ■ 256 COLORS FROM 262,000 ■ S/18-BrrCARDHAS512KVIOEO HAM EXPANDABLE TO 1MB VGA-PKG-1024+ $499.95 VGA-PKG 840X480 VGA PACKAGE MORE MONITORS... NEC-MULTI-3D 14" MULTISYNCH MONITOR . $649.00 VGA-MONITOR VGA MONITOR $379.95 MONO-VGA PAPERWHITE VGA MONITOR $1 39.95 J D R- AMBER 1 ? MONO AMBER SC RE EN $89.95 ■KEY WITH 12 FUNCTION KEYS ■ 29S/3BS/4S6 COMPATIBLE STC-5339 „ „ $69.95 FC-3001 101-KEY.12 F-K6YS i CALCULATOR $74.95 BTC-5060 84 KEY WITH 10 FUNCTION KEYS ™ — $59.95 DYNAMIC RAM THS4464-12 41256-100 41S5S--4) 4i«att-ioo 555SS.4 2S2I44I1 26214411 J12U4r4 262144K4 104857011 I0W7O1 104B576JI MEMORY MODULES PAUTi 4125GA9B-BD 4210MA8B-10 421-O0ASB-10 421000A-B80 4210WASB-60 -JgKXBSIP^O 1HBXSS1R-10 IUBK-StP-80 SEE SPEED FOR PRICE 2»Xi3 ICBs SIMM.PC 21 M 1MB 1 6 100m 5IWUMAC 64.95 1MB 1 9 lOOnt SIMM/PC S4.W 1UB19 80ns SIMMPC 68.95 1MH.9 eons S1MM.-PC MM 25£X>a SCrx SJP.PC 21.95 lMSr9 toonj SlP-fC MJ« 1MB ■ 9 BOni SIP PC 69-95 MATH CO-PROCESSORS MANUAL, SOFTWARE QVIOE * MANUFA CtVtittS & YEAH WARRANTY $7995 ¥ 2400 BAUD MODEM I ■ 2400/1 200/300 BPS INTERNAL DATA MODEM -FULL HAYES ■ AT COMPATIBILITY • INCLUDES PROCOMM SOFTWARE I MCT-241 $79.95 1 MCT-FAXM AS ABOVE W/4800BPS FAX SEND $89.95 I PCEM7296 INTTiL 9600 BPS EXTERNAL $549.00 I PCCB6201 INTEL SATiSFAXT ION FAXMODEM $449.95 M. VIVA-Z4MNP 2400 BPS EXT MODEM W.'MNP $149.95 PARTI -JEEOPWCE PARTH SPEED PRICE ana? 6 um » m -03-7-20 20 mhi 200.-5 60*7-2 8 MH; 139.95 KUJT.IS ;5MH;21-J5 9087-1 IBUHl 168,95 80387.33 33 MHl 229.-5 60217- XL 13 MHz 9445 KBIT-SX !6MK;1»»i -0387-16 16MHJ 199.95 80387-SX20 20MHI 149.95 X 83D87-16 16 MHz 299.99 CI S3D87-25 25 MHj 419.95 fj 83D«7«133MHi 94940 ■3097-40 40 MHI 649.00 84387-1 6(SX) ISMHI 2S9.94 83537- K(5X) 20 MHl 329.95 «3S«7-25|SX) 25 MHl 399.95 2C974 8 MHl 79.95 2C97-I2 12 MHl 99.99 2CS7-10 10 MHl 69.95 2C17--0 20MHi13Ml MAXIMIZE CO-PROCESSOR SPEED OUR "2ND STAGE" ALLOWS 20MH2 CO-PROCESSORS TO RUN AT FULL SPEED IN THE SLOWEST 2B6 SYSTEMS 2ND-STAGE FOR 10(20 MHZ 80287S $49.95 2N D-ST AG E-8 FOR 8'1 6 MHZ 802-7-5 $49.95 L 2ND-STAGE-12 FOR 12 MHZ80287S $49.95 HO @Ba»* 54J CIRCLE 255 ON FREE INFORMATION CARD SvtVtef <££a 1*334.6 3278819 szreea 13t072«8 nor* 250m lion- 250ns Worn BOn s»™ Han r-.'O: 25V 21V 1 25V I2SV 12.5V IJSV 12.5V 12 5V !25V IS 5V STATIC PW3CM0S UP HM6116-3 HIHtiaiJM HUt11«LP-3 HU6t16LP-2 HU£2M!.F.1S HMS204LP-12 iJMLP-10 HU412S6LP-15 HU4J256LP-12 O2S&LP-10 2D4M 2CMSi« 2048i* 204a»S •J I 9'.-r?. 61D2JS 51fl2j* 3276518 3276SiS 327««S Efipni BOOra 1 50m 120ns ISOra I20n» lOOin 150nt 120m 100m 24 Y N 24 Y Y 24 Y Y 24 Y Y 29 Y Y 28 Y Y 28 Y V 29 Y Y 29 Y Y 29 Y Y mmfr* SPEED PINS IN OUT LOS FUNCTIONS 2 $ ANO-OfllNV 4 a 2 4 a PRICE 2 55 14* 295 2.95 Ml tM US AND-OB XOR INV 2.M PART* SPEED PINS REPLACES tN OUT PRICE B 35ni 1SV8-15 15mi 20VB 35m 2BV9-I5 15nt ZZV1S 35n» 22V10-IS 15r* 20 I0LS TO I6RP8 a 249 211 lOLBTOieRPS 8 a 2.95 24 14LS TO 16RP8 20 9 3.49 2i I4L0TO16RPI 20 a 4.95 24 POM OUTPUTS 22 10 6.95 24 POM OUTPUTS 22 10 19.98 IDC CONNECTORS AND CABLE ORDER BY CONTACTS 20 26 34 40 50 SOLDER HEADER JDHxiS 1.29 1 .88 2.20 258 3. 2 J HA READER IDHllSR 1.35 1.76 231 2,72 3.39 WW HEADER IDHllW 2.9fl 394 .;.;,:■ 5.29 6.63 RAW W HEADER IDHaxWR 3.23 4.22 ^ n J 60 :• :sc HEADER SOCKET iDriA* .65 .75 .75 1.19 1.19 RIBBON HEADED IDMrn S.50 6-25 7.00 7.50 8.50 IDC EDGE CARD IDExi .55 .75 .89 1.29 1.E9 RIBBON CABLE RCm .30 .39 .51 .00 ,75 ORDERING INSTRUCTIONS. INSERT THE NUMBER OF CONTACTS IN THE POSITION MARKED Sx m OF THE "ORDER BV PART NUMBER LISTED. EXAMPLE. A IS-PIN RIGHT ANGIE MALE PC SOI DER PART NllMRFR WOUL QBEDB I5PR 30-DAY MONEY BACK GUARANTEE 1 YEAR WARRANTY TOLL-FREE TECH SUPPORT MMC SJJSJDR INSTRUMENTS' TEST EQUIPMENT AU JOB mtmUMCHTI CJUmr A 1 Y£AK WAJUtANTY 3BMHZ OSCILLOSCOPE • EXCEPTONALLY BRIGHT CRT • TV SYNC FILTER ■ DELAYED* SINGLE SWEEP MODES - FAST IONS RISE TIME MODEL-3500 $499.95 MODEL-2000 20M HZ VERSION $399.95 10QMHZ MULTIFUNCTION COUNTER ■ RANGE: 1QHZ TO 10MHZ DIRECT. 10MH7 TO 100MHZ J ■ ■' - " - -." , PRESCALEDBY10 «■■■■■ ■ PERIOD MEASUREMENTS. 10HZ TO 2.5MHZ±1 COUNT f~¥* ■• ACCURACY - TIME BASE 10MHZ MBMBbSHBiT) • 8 DIGIT LED DISPLAY W/DECIMAL POINT DFC-1IM $1 79 AS DFC-1000 i GHZ VERSION $199.95 DFG-600 SYHEEP FUNCTION GENERATOR. . $189.95 DOS>£M> AUDIO OSCILLATOR-COUNTER $1 89.95 3.5 DIGIT DMM $ 29 95 ■ BASIC DC ACCURACY i0.5% ^jA_W ''"""•' • DC VOLTAGE 2V-1000V: AC i VOLTAGE: 2O0V-7S0V; DC V CURRENT: 2MA-2A ■ RESISTANCE. 2KO ■ 2MO 3l^F - 14 RANGES DMM-150 „. $29.95 OMM-200 3.5 DIGIT DMM 22 RANGES . $49.95 OMM-300 3 S DIGIT 19 RANGES WlCAP S TEMP $79.95 DPM-1500PROSEDMM AUTORANGING $49.95 LOGIC PROBE LP-100 $17.95 LP-2MPULSEHPROBE $19.95 PROTOTYPE CARDS 8-BIT SOLDERLESS BOSS 4 _ ^^r BREADBOARD WITH DECODE *7W° ■ ADDRESS DECODING LOGIC, DATA BUFFERING, 2 LSI CIR- CUITS FOR PROGRAMMABLE OCrTAL L'0 6 COUNTER-TIMER FUNCTIONS ■ LOGICALLY GROUPED- ACCESSES ALL HO SIGNAL CONNECTIONS ■ CLEARLY LABELLED BUSLINES ■ ACCEPTS UP TO 24 FOURTEEN- PIN ICS ■ ACCEPTS 9, 15. 25 OR 37-PIN D-SUB CONNECTORS PDS-601 „. , „ $79.95 PDS-600 ABOVE CARD WITHOUT DECODE $49.95 PDS-611 16-BIT BUS BREADBOARD WITH DECODE $89.95 PDS-61 ABOVE CARD WITHOUT DECODE $59.95 PC PROTOTYPING CARDS • 9-BIT CARD- GOLD-PLATED EDGE- CARD FINGERS • BUFFERING 1 DECODE LAYOLIT ■ FR-4 EPOXY LAMINATE [ JDR-PR2 „„.„. „..., JDR-PR1 AS ABOVE. W>0 110 DECODING LAYOUT | JDR-PR10 16-BIT WTTH HO DECODING LAYOUT . EXT-B0286 286-COMPATIBLE EXTENDER CARD I EXT-808S S088-COMPATIBLE EXTENDER CARD SOLDERLESS BREADBOARDS PDS-100 3.9" X 8? POS-SOO 5.1" X US' PDS-300 8.9'X91- POS-4O0 . B.2" X 9.5' TIE ■ BNOG PTS POSTS PRICE I CUSTOMER SERVICE 800S3S-50Q1 LOCAL/INTERNATIONAL 40SSS9-1200 TECHNICAL SVPP0RT 800*38*002 LOCAL/INTLFAX 408-559-0250 TOLL-FREE FAX ORDERS 800*59*003 BBS 19600/2400/1200) 408*55-0253 ORDER TOLL-FREE (l 800-538-5000 lafe»» ■FRI. 7 A.M. TO S P.M., SAT. 9 A.M. TO 3 P.M. ^^k* a CIRCLE 2543 ON FREE INFORMATION CARD s m m 21 i 54K 6. 6. MICRO P. 0. Box 280298 Dallas, Texas 75228 (2t4) 271-5546 I LU Z o a O o -J 5 UJ Uj E DC O U. O Uj CO C/3 o z o cr F o O Q < Brand New from McLean Eng A Division of Zero Corp Square 4-11/16" by 1 5 Thick 10' Wire Leads 120V - SOhi - .12 amp» - 110CFM Metal Housing - 5 Plastic Blades UL and CSA Approved $5.95 ea BATTERY Brand Mew - '91 Date Code Rechargeable Sealed Battery 6 Volts @ 4 Amp/h Measures: 4 " fall - 2-3 '4 Wide DISPLAY DEVICES 4MT0T By Futaha Vacuum Fluoresced ClocK And Timer • 4 Digit Display Easy to Read - Easy lo Use .3" Character Height With Data 79C LTP 1157AE 1,2" 5x7 Matrix Displays 5x7 Array with x y select. This Red Orange Matrix Can Be Stacked Horizontally. Choice of Two Matrix Orientation- Cathode Column, Anode Row. Great For "Moving Message" Signs. $1.19 Ea., 8/56.95. 100/S75.00 LSOO .14 LS114 .25 LS241 .60 LS01 .14 LS122 .35 LS242 .65 LS02 LS03 .14 .14 LS123 45 LS124 1.35 LS243 50 LS244 55 L504 .14 LS125 .30 LS245 .55 LS05 \a LS126 35 LS2S1 45 LS08 .14 LS132 35 LS253 40 LSD 9 14 LS133 25 LS257 15 LS10 .14 LS136 28 LS258 45 LS11 .14 LS138 35 LS259100 LS12 .20 LS139 35 L5260 40 LS13 .25 LS145 75 LS266 30 LSI* .30 LS148 35 LS273 75 LS15 .20 LS151 .35 LS279 ,30 LS20 14 LS153 35 LS28Q 80 LS21 .16 LS154 .85 LS283 35 LS22 16 LS155 .50 LS290 70 LS26 14 LS156 .42 LS293 ,50 LS27 20 LS1S7 30 LS298 65 LS2S .15 LS158 25 LS2991.00 LS3D .14 LS160 .25 LS322130 LS32 16 LS161 .35 LS323 2 25 LS33 .25 LS162 .45 LS34B 75 LS37 24 LS163 .36 LS353 1 00 LS38 24 LS1S4 45 LS357 80 LS42 .35 LS165 60 LS363 75 LS51 .15 LS166 75 LS364 '5 LS54 20 LS169 .90 LS365 ,30 LS55 ?n LS170 .45 IS366 28 LS73 .33 LS173 80 LS367 .35 LS74 .22 LS174 35 LS368 .30 LS75 .25 LS175 35 LS3T3 50 IS83 .30 LS181 1 25 LS374 45 LS85 .45 LS191 45 IS375 .35 LS86 20 LS192 .65 LS377 75 LS90 .35 LS193 65 LS378 80 LSS2 30 LSI 94 40 LS390 80 LS83 .25 LS195 52 LS393 75 LS95 30 LS196 .55 LS399 1 00 LS96 33 LS197 75 LS541120 LS107 2B LS221 50 LS645 75 IS109 .20 LS240 50 LS64S 75 LS112 25 LS670 80 LS113 .25 25 LS 2569 1 50 THE $23 NETWORK Try The 1st Truly Low Cost LAN . Connect 2 or 3 PCs, XTs. ATs • Uses serial ports and 5 wire cable . Runs at 115 K baud • Runs in background, totally transparent ■ Share any device, any file, any time • Needs only 14K oi ram Skeptical We make believers! SUPER BUYS 2016 P-1 5 2K x 8 N-MOS Trimmed Leads, But will Fll in Sockets Super Buy 10/295 105/2200 2N4401 Super 2N3904 NPN Switching Transistor 40V-TO-92 - P.O. Leads 15/1.00 1000/20,00 80C32 C-MOS By Matra - 12HHZ 3.95 LM350T . 2.65 LM338K 4.95 1618-15 TI-B-PAL 1.25 SORB ? 3.25 8742 7.00 SOCKETS Low Prplile SOLDFR TAH 6 Pin 14 1 00 8 Pin 11 1 00 14 Pin 13 1 00 16 Pin 13100 18 Pin 1 t 1 00 20 Pin 13/1 00 27 Pin 13/1 00 24 Pm 8/1.00 28 Pin 7' 100 40 Pin 7 '1.00 68 Pin Pt.CC 79 84 Pin PLCC 89 BUV S10 GET S1 00 FRFE CHOICF 6500/6800 TEXT TO SPEECH BOARD PC/XT COMPATIBLE. MAKE YOUR COMPUTER TALK! WIRE WRAP Dual Wrap - 2 Level 14 Pin 10/2 50 100/20.00 16 Pin 10/2.50 100/20 00 20 Pin 10/3.50 100/30.00 6502 2 00 6821 1 00 6520 1 25 6845P 2.20 6522 2 70 6845S 2.20 6530 3 00 6850 1 75 6537 425 6852 3.50 6545 2 10 6860 395 6551 2 40 68681 3.00 8800 140 SBA09EP 1 29 6807 } 5,0 68A40 4 00 6803 3 00 S8A54 3 00 6B05 2.95 68B09 400 6B09FP 2 75 BBB10 2 00 6809P 2 SO 68645 4 95 6810 1 25 68B54 4 00 M $69 95 4SSFMBI.ED & TESTED A no *3 SO SHIPPING S HANDLING A VERY POWERFUL AND AMAZING SPEECH CARD USES THE GFNFRAL INSTRUMENTS SP0256-AL2 SPEECH CHIP AND THE CTS256A AL2 TEXT TO SPEECH CONVERTER THIS BOARD USES ONE SI OT ON THE MOTHFRBOARD AND REQUIPFS A COM SERIAL PORT BOARD MAY ALSO BE USED IN A STAND AL ONE ENVIRONMENT (EXTERNAL POWER SUPPLY) WITH ALMCST ANV COMPUTER THAI HAS A RS232 SERIAL PORT. TO USE THE BOARD IT IS ONLY NECFSSARY TO SEND ENGLISH TEXT TO THE RS232 INPUT ON THE BOARD THE BOARD INCLUDES A 1500 BYTE TEXT BUFFER AND HANDSHAKE LINF TO ALLOW YOU TO SFNP DATA TO THE BOAPO THE SAME AS YOU WOULD SEND DATA TO AN RS73? SERIAL PRINTER VOU CAN SET UP BATCH FllfS THAT WILL MAKE YOUR COMPUTFR GREET YOU WITH GOOD MORNING MASTFR. FTC FVFRY TIME YOU TURN IT ON. DEMONSTRATION SOFTWARF AND A LIBRARY BUILDING PRO- GRAM APF INCLUDED ON A 5 INCH PC XT DISKETTE FULL DOCUMENTATION AND SCHEMATICS ARE ALSO INCLUDED FOR INFORMATION ON A LOW COST §PEECH SYNTHESIZER SYSTEM FOR THE VISUALLY IMPAIRED. PLEASE SEND FOR FREE PACKET T.M1. STAND AIONE POWER SUPPLV FQH ABOVE ADD %2 5(1 SHIPPING I HANDLING *19 99 STATIC RAM 2016-2KX8 200 n.s. 1.00 2101-1 - 256X4 500 n.s. .75 21L02-1 350 n.s .65 2102AL-4 LP. 450 ns 49 2111 1 256X4 500 n s 1 00 2112A 2 2 50 2114L 3 1KX4 300 n.s. 45 2I25A-2 1KX1 70 ns 1 70 2147 4KX1 1.95 6116P 4 1 00 6117 1 20 6764 15 140 62256 37KX8 5 75 DYNAMIC RAM 2108-4 8KX1 1.50 2118 J 16KX1 5Voll 70 4027-4KX1 250 n s 80 4116-16KX1 750 n * 40 411S-16KX1 700 ns 75 4116 16KX1 150 n s 90 4164 150 n.s. 49 or 9/3.50 4164 120 ns 1 10 4164-100 n.s. 140 TMS4416 16KX4- 150 n.s. 2 75 4464-150 ns 1 60 4464 120 ns 1 75 4464- 100 ns, 1.95 4464-80 n.s. 2 10 41256 150 ns 1 25 or 9/9.95 41256 120 n .«. 1 40 41256 100 n s 1 45 41256-80 ns 1 65 41256-60 n s 2 30 1 Meg 100 n b 4 90 1 Meg 80 ns 5 20 41475B nil n s 256 x 4 5 40 SIPPS » SIMMS AVAIl ABI E THREE CHIP SET 16450 1488. 1489 BG SPECIAL S6 95 EPR0M SPECIAL We bought a large guantlty of 2708s, 2716s, 2532s. 2732s. 2764s. 27128*. 27512* and 27256s from a computer manu- facturer who redesigned their hoards We removed them from sockets, erased and verified them, and now we offer the sav- ings to you. Complete satisfac- tion guaranteed. Your Choice 2708 1 20 10/8 no 2716 1 75 10/15 00 2532 2.00 10/17.50 2732 200 10/1750 2764 2 25 10/20.00 27128 3.20 10/27 50 27256 3.85 10/32.50 27512 5 10 10/45.00 ZEE EE 8031 2 95 8251 110 80C32<; 3 95 8253-5 1 75 8035 1 00 8254 1.80 8039 1.00 8255 1.50 8085 1,55 8255-5 1 75 8086 1 55 6257 1 50 8087 87 50 8259A 1 85 8087-1 167 50 8259C-5 2 10 8087 2 127.50 8275 10 95 8088 2 20 8279 2 75 8088-2 3 25 8284 149 8155 2,25 R?*fc 3 50 8156 2.25 «787 ,' 49 8202A 8.00 «788 1 5P 8212 1 25 8530 3 0Q 8214 2.00 8741 ' 0Q 82*6 1 75 B747 t nn 8224 1 25 «""*'*» ' nn B23B 1 75 8749 7 on 8737 5 2 80 BT" 7 no 8743 1 75 80286-8 PLCC « 5n S?5fi 2 95 80787 8 125 00 (16450) 6 5!'' fln?8' 10 135 nn (16550) 15 00 V 20-1 OMHZ 6 50 m Z D -n O 3) ~n 3) rn m 2 2 I* O o o < 3D -A © m m TERMS: (Unless specified elsewhere) Add $3.25 postage, we pay balance. Orders over $50.00 add 85C lor insurance. No COD Texas Res. aaM 6'/4%Tax. 90 Day Money Back Guarantee on all items. All items subject to prior sate. Prices subject to change without notice. Foreign order - US funds only. We cannot ship to Mexico or Puerto Rico. Countries other than Canada, add $9.00 shipping and handling. CIRCLE 288 ON FREE INFORMATION CAFtO 54L TOLL FREE ORDER HOT LINE 1-800-423-0070 wm&®$mm PC BOARD HACKERS CORNER WIRELESS FM STEREO BROADCASTER KIT CAT. NO. SFM-II $19.95 DC'S all new FM Stereo Transmitter Kit hi based upon the unique BA1404 Stereo Broadcaster Integrated Circuit that Includes all the complex circuitry to generate the stereo signal. The kit ncludes the new special IC, a 38 KHz crystal, circuit board, and all the small somponents . This facinating project will provide many hours 3f enjoyment as you re-broadcast your CD/VCR/Cassette or stereo broadcasts from your satellite system thru your high- quality FM home or auto stereo system. MAKE CIRCUIT BOARDS THE NEW, EASY WAY FUNCTION GENERATOR KIT ORDER FG2 KIT $19.95 lA great project to enhance your bench. This handy little furtc- Ition generator has a built-in buffer amplifier, a 3-decade range [selector switch that covers 1 5 hZ to 25 khZ, output level con- Itrol and function switch to select sine, square, or triangle. PC BOARD SUPPLIES Copper clad boards for use wtth TEC-200 22-250 3X6 $1.62 PI -36 3X6 2.03 22-260 4X6 2.27 22-261 6X6 2.88 22-263 6X9 4.08 POSITIVE PRESEN- SITIZED PC BOARDS 22-330 2X4 $3.83 22-332 3X4 4.40 22-334 4X6 5.78 22-336 6X6 7.60 22-338 6X9 9.63 OC^S PARTS WAREHOUSE UNIVERSAL DECODER (RE MAY 1 990) ICs CD22402E 7.95 CA3126E 1.95 NE564 2.29 LM733 .99 74CO0N .29 CD4053 .50 LM7805 .50 LM7812 .50 LM7905 .50 18 Uh CHOKE .39 3.58 MHz 1.00 ORDER ABOVE ITEMS DIRECT FROM THIS PAGE ICL7106EV KIT LCD DIGITAL PANEL METER NOW $24.95 The ICL7106 EV Kit is based upon a 3-1 /2 digit A/D converter that Includes all the circuitry to build a digital panel meter. Operates from a 9-v battery. Includes LCD, 71 06 IC, circuit board and small parts. Builder must add resistors to expand to multi-meter POWER SUPPLY KIT PS-1 $16.99 Output of this power supply is con- linionsly adjustable from 1.2 lo 25V OC . The LM317T voltage regulator provides excellent regulation and ripple rejection. Includes a I A transformer, PC board, LM317T, 2 binding posts, and all small parts. MORE KITS 3 DIGIT LED DVM ONLY 3" X 3" READS TO 1 00 V DC ORDER DVM3 $1 9.95 FM WIRELESS BROADCASTER FMI $ 9.95 8038 FUNCTION GEN. KIT FGI $9.50 SEQUENCER PROJECT SEQKIT $9.50 CHRISTMAS TREE PROJECT Build this unique seasonal project and have an unusual conversion piece. Powered by two D cells, 17 LEDs flash in a seemingly ran- dom fash on. Kit Includes everything except batteries. ORDER XMASKIT $16.95 70-WATT STEREO POWER AMP 35 WATTS PER CHANNEL Now you can boos ylour low power car stereo with the new PM-35 module kit. Each module can provide up to 35 watts per chan- nel whil operating from the vehicle's battery into a 4 ohm speaker system. New hi-tech power op-amps are used In a unique circuit to Increase voltage swings, thus more power.Additional modules can be used to In- crease power to 100 or 200 watts/channel. ORDER PM-35 KIT $19.95 DC ELECTRONICS TO ORDER FROM THIS PAGE CALL SEND MAIL ORDERS TO: PO BOX 3203 SCOTTSDALE, AZ 85271 UNIQUE ICs NE602 $2.00 UGN3013 .98 ULN2429 1.75 ZN414 2.00 XR2206CP 4.75 XR2212CP 4.75 MAX232 5.40 ULN3330 1.50 ICL8038 3.85 1CM7226BIPL 23.50 z 9 m £ .: 1 -800-423-0070 m 33 .8 CIRCLE 222 ON FREE INFORMATION CARD 54M NEW • USED • BUY • SELL SURPLUS • DEALS Components To Computers Ray-O-Vac. Replacement Battery for AT ACP fVN SU ACP Only *9.95 a LED's T-l 3/4 Infared LED QtylOOnly *1.49 T-l 3/4 Red LED QtylOOnly 79 1 T-l 3/4 Yellow LED QtylOOnly 99 c XELTEK E(E)PROM Programmers Single socket version .,.. s 129. 4 socket version *199. 8 socket version .*269. 16 socket s 479. UNIVERSAL Programs E(E)PROM, PROM, PAL, GAL, EPLD, FPLD, tests TTL, CMOS, RAM etc., UniPro s 549. SUPER UNIVERSAL Programs E(E)PROM, Hash EPROM, PROM, PAL, GAL, EPLD, FPLD (to 68 pins PLCC), tests TTL, CMOS, RAM etc. {to 40 pin), SuperPro *699. MICRO CONTROLLER PROGRAMMER E(E)PROM, Controllers s 359. PLD PROGRAMMER PAL, GAL, EPLD, FPLD*129. NEW! "4-in-l"Test Measurement System Frequency Counter(lOOMHz), function Generator {2 MHz), 3-1 /2 digit Multimeter and Power Supply all in chassis MFI-"4-in-l" Tester s 799. 3.5" and 5.25" Bulk Diskettes Sale Disks certified to ANSI stan- dards with ACP's 100% Money- Back Guarantee, sleeves and tabs included. Labels available... 5.25" Diskettes DS/DD (360K) Qtv- 1000 DS/DD 20«each Qty.500 DS/DD 23<£ each Qtv. 100 DS/DD 25ga from SO He to 600 kHi tnput Impectsncs 136. OOO, BOO Q and bridging ( 10K] ttntif tapped Output impedance 136. 000, and 000 canter tapped Maximum l.v*. la +22 dBm (10 V at 000 0) Attenuation of 1 10 dB In 1 dB itept FLUORESCENT MAGNIFIER LIGHT DAYTON 2V3538 $49.95 ■ 2 TO 1 MAGNIFICATION B OUTLET IN BASE ■ 22 WATT CIRCUUNE LAMP A must for working on those small items. While quantities heat. Used - GOOD condition. DON'T WAIT! CALL NOW FOR YOUR COPY OF THE TUCKER HOBBYIST CATALOG! €$ Tucker Electronics has a large inventory of New & "Pulls'* TUBES at attractive Prices, Please call for prices and availability. HP 267 3A INTELLIGENT GRAPHICS PRINTER HP PRICE 32?l£&flG: TUCKER PRICE $249.00 > ■ Eicfirectionol thermal printing at 120 characters per second, with ft X 16 dot-matrix character calls ■ Features fui 128 US ASCII character set, Roman ax- tension characters and Una drawing characters ■ Auto-cantering, windowing* and off* at* are included ■ Mergine. tabs, print mode, character sets, page format and data comrnunications selected via control panel Z 9 m CD m CIRCLE 236 ON FREE INFORMATION CARD 54Q o LLJ I LU o £ 1-800-422-3525 "THE NUMBER THAT SAVES YOU MONEY!' t Specials J FIELD SERVICE KIT The Legge Field Service Kit permits repair tecnlcians to perform f iekJ repair on a staticfree surface. Complete I with 2' x 2' work surface, wrist-band, 15' groundwith T 1 -meg ohm resistor and clip. Part No. 570-0001 Shipping & Handling $4.50 ea. $29. 95 ea. SWITCHING POWER SUPPLY Size: 5.25" x 11" 120vac Output:: +38v, +5v, -5v Advanced Power Ind. Part No. 500-0014 Shipping & Handling $5 ea. ELECTRONIC COUNT 5 Digit In pulse counter. 24VDC - 3 WATTS Size:1"x 1.56"x 2.125" Wire leads & mounting bracket.. 2 for # Part No. 390-0006 Shipping & Handling $3 per pair. ij>y. 95 ea. POWERHORN 5" speaker with 6' line cord and 1/8"mlnlplug. Part No. 180-0029 Shipping & Handling $4 ea. ea. PLASTIC PARTS BOX Great for under counter storage. 3 for Part No. 5BO-9998 (t i O 00 Shipping & Handling $9.50 $12/ ea. Call or write for a catalog. ^ Auto Accessories REGENCY TRAVEL SCANNER The INFORMANT, Great for Ihe travelers* programed with frequencies for each state. Includes DC power cord and AC adapter included. Part No. 660-0018 Shipping & Handling $4.50 ea. $79 95 ea. ESCORT RADAR DETECTOR The poplar Escort radar detector. XK Band. Signal strength meter. Highway/City switch and alert lamp. {Factory Demo's) ' Free ESCORT t-shlrt with purchase of radar detector. Part No. 660-0020 Shipping & Handling $4.50 ea. $79. 95 ea. I^HobbySpecials | 31/2" DISK DRIVE 360 K Disk Drive MFG. By:Milsumi Model No. M57BCL-1 Complete with mounting bracket and two S&K switches. Great tor hobbyist and computer buffs. 28 pin data connection and 4 pin power connection $12. 95 Part No. 220-3415 Shipping <£ Handling $5 ea. MAGNAVOX FM RADIO BOARD Add a speaker, add power, and its a radio. Part No. 650-0014 Shipping & Handling $5 ea. VOX BOARD WITH POWER ADAPTER First sound will produce 6VDC out, second sound will will give 0VDC out. 120VAC6VDC, 100mA Part No.650-0096 Shipping & Handling $4 ea ea. Robot Accessories | HERO 2000 ROBOT ARM KIT The arm Kit comes with detailed step-by- step assembly Instructions. The patented gropper is capable of lifting 1 lb. and of exerting specific amounts of force up to 3.75 lbs. The closed- loop DC servomotor design provides excellent overall accuracy and repeatability. Assembly required. Part No. 370-0003 S> 1 f 9 1 Shipping & Handling $8.50 ea. ROBOTIC EDUCATIONAL KIT A comprehensive introductory course on intelligent machines which encompasses robotics.A^computers and sensor systems. The course has five units of text, a sixth with ' experiments and, a / final exam kit. Also j Included are a wide ' range of objects needed to perform the experiments 95 ea. Part No. 370-0006 Shipping & Handling $6 ea. $9. 95 ea. CASES J YAMAHA CARRYING CASE Universal carrying case for long flat obejects like tennis rackets or musical instruments. Fits objects up to 3 57e'(H)x11"(W}x26"(L) In size. Part No. 650-9997 Shipping Si Handling $3 ea. $14. 95 ea. Mendelson Electronics Co., Inc. 340 E. First Street Dayton, Ohio 45402 800/422-3525 * FAX 513/461-3391 * 513/461-3525 NYLON CD CARRYING CASE Padded nylon CD carrying case, Includes hand and shoulder straps. Part No. 650-9996 Shipping & Handling $3 ea i iwtf exfe-nvfc q' is.u Com ■ • ■ - .. . 20% Restocking Fee on Non-Detective Returns 54R Mendelson Electronics Co.. Inc. 30 YEARS EXPERIENCE IN THE ELECTRONICS INDUSTRY! Since 1960 We have been buying SPECIAL PURCHASE PRODUCTS which results in LOWER PRICES for our customers. TECHNICAL SUPPORT ON ALL PRODUCTS WE SELL! ORDERS are shipped within 48 Hours or less, via UPS Ground. OVERNIGHT SERVICE is available via UPS NEXT DAY AIR. NO SERVICE CHARGE FOR VISA, MASTERCARD, OR DISCOVER! CO.D'.S WELCOME! 30 DAY MONEY BACK GUARANTEE! ' 'Less 20% Restocking Fee for Non-Defective Returns I COMPUTER PRODUCTS IBM PC/AT CASE ■Genuine !8M Case Full Size AT Case ■Accepts Mini or Full Size Motherboards ■Slide-off Top •8 Slot Frame ■Made in U.S.A. Part No. 220-2759 Shipping & Handling $13,50 ea EXTERNAL DUAL DRIVE CASE ■Designed for either Floppy or Hard Drives ■Includes PowerSupply & Line Cord ■Accepts 2-1/2 HT. ■or 1 -Full HT. Drive Part No. 220-2761 Shipping & Handling $6.50 ea 5 1/4" QUAD DENSITY FLOPPY DISK DRIVE -720KB Double Sided/Quad Density ■80 Track 96TPI ■AT&TKS-23114 ■Fujitsu M2552A ■Half Height ■Dark Brown Face Plate Part No. 220-3401 Shipping & Handling $5.50 ea. $39 ea. AT 200 WATT POWER SUPPLY Factory Reburbished Fits full size AT case only, 1 20/220 V Input. Part No. 500-0041 Shipping & Handling $6.50 ea 101 XT/AT ENHANCED KEYBOARD ■IBM Plug Compatible ■Auto Switching XT or AT WYSE Part No. 770090-01 -Num Lock, Caps Lock, Scroll Lock LEDS Part No. 220-3205 Shipping & Handling $6.50 ea. $45 ea. 9600 BAUD FAX CARD -*n EW . Microtek MFAX96P Auto dial & receive Background Operation I Multi- page/Destination Polling. Operates any Microtek 300 dpi , Scanner. Includes Fax Software. IBM PC.XT.AT Compatible Part 140. 220-3109 Shipping & Handling $5 ea. $159 ea. TEMPEST LETTER QUALITY PRINTER ■120/240VAC 49/63HZ ■RS232C/MIL-STD-188 ■Serial Interface ■Letter Quality Daisy Printwheel ■Mfg. for Inteq by Qume •FACTORY REFURBISHED -Model LQP-51 00B (AFP- 1 ■55 CPS Print Speed Wide Carriage Part No. 220-3702 Shipping & Handling $25 ea. $195 ea. 45MB SCSI HARD DRIVE RODIME RO3057S 3 1/2" DRIVE SCSI lnterface.28ms APPLE & IBM compatible Part No, 220-341 2 $175 ea. 85MB RO3085S 28ms Part No.220-3413 $239 ea. 10SMBRO3130T24ms Part No.220-3414 $299 ea. Shipping & Handling $5 .50 ea. SCSI FLOPPY/HARD CONTROLLER FUTURE DOMAIN TMC-871 8- Bit controller XT/AT/386/488 COMPATIBLE Controls up to 4 Floppy drives, and up to 7 SCSI devices) hard disk CD ROM, tape drives, etc.) Part no. 220-3108 Shipping & Handling $5 ea. $99 ea. SWITCHING POWER SUPPLY ■Size 8 1ffi"x5"x2" ■5V10A-12V4.1A -5V.3A-12V.5A Part No. 500-008 Shipping A Handling $4.50 aa " F $24 ea. 1-800-422-3525 fax 1-513-461-3391 "THE NUMBER THAT SAVES YOU MONEY!" CIRCLE 226 ON FREE INFORMATION CARD m CD m — L 54S Internal Programmer for PC New Intelligent Averaging Algorithm. Programs 64A in 10 sec, 256 in 1 min., 1 Meg (27010, 011) in 2 min. 45 sec, 2 Meg (27C2001) in 5 min. Internal card with externa! 40 pin ZIF. 2 ft. Cable 40 pin ZIF • Reads, Verifies, and programs 2716, 32,32A,64,64A,128, 128A256, 512,513,010,011,301,2702001, MCM 68764, 2532, 4 Megabits • Automatically sets programming voltage • Load and save buffer to disk • Binary, Intel Hex, and Motorola S formats ■ No personality modules required • 1 Year warranty • 10 days money back guarantee • Adapters available for 8748, 49, 51 , 751 , 52, 55, TMS 7742, 27210, 57C1024, and memory cards •Made in U.S.A. EMPDEMO.EXE available BBS (916) 972-8042 4539 Orange Grove Ave. Sacramento, CA 95841 (Monday-Friday, 8 am-5 pm PST) NEEDHAM'S ELECTRONICS COD. Call for more information (916)924-8037 FAX (916) 972-9960 CIRCLE 229 ON FREE INFORMATION CARD O z O c Ul — 1 LU o □ REPLACEMENT BATTERIES 5KKSB (ALL NEW - MADE IN USA) ICOM 7S 13.2v 1200 mah $50.00 8S9.6v1200 mah S59.00 BP7 13.2V 600 mah 159.09 BP8 8.4v 1000 mah (59.00 SA/SAT BP82.BPB3 BP83A 7.2v 750 mah BP84 7.2V1000 mah BP85A 9.6v 600 mah 8P85B12v600mah I e YAESU FNB-2 v 500 mah (ZI.D0 FNB-2V600 mah t23.H0 FNB-4A FNB-1G FNB-10S7.2v100Omah $43.00 FNB-12 FNB-12S12v600mah (45.00 KENWOOD 111 FBI 12V1000 mah KNB4 72v2200 mah PB6 7.2v 750 mah PB7 7.2v 1500 mah PBS 12v 750 mah 159.00 159.00 145.00 $55.00 $55.00 SPECIALS ICOM-SA/SAT IC0M-72A CHARGER WITH BP-84 (Equiv.)— 3" High 7.2V (8 1Q00 MAH $135.00 or BP-85B (Equiv.) 3" High 12v fa 600 MAH $164.00 MOTOROLA HT300 7.2v 1600 mah $45.00 HT90 12v 600 mah $34.00 HT44012v600mah $39.00 MT500 15v 500 mah $39.00 RADIUS RO 500 mah SABER 7.2v 1100 mah S28.00 S 5 9.00 INSERTS KENWOOD PB-21 (13.00, PB-25, 26- $20.00 ICOM BP-3 (17,00. BP-5$!ZJ0 BP-7, BP-8 CAMCORDER JVC PANASONIC PVBP80/88 12v2.3 amps RCA/ HITACHI FUll SIZE VHS-C SONY NP22 NP55/77 ALL BRANDS AVAILABLE CELLULAR MITSUBISHI NEC NOVATEL PANASONIC Bag Phone Kits MOTOROLA "FLIP" ieo.oo 'ALL BATTERY PACKS - GUARANTEED TO HAVE THE ADVERTISED CAPACITY SEND FOR FREE CATALOG DEALER INQUIRIES WELCOME BATTERY-TECH, INC. 28-25 215 PLACE, BAYSIDE, NY. 11360 • FAX 718-461-1978 800-442-4275- N.Y.S. 718-631-4275 MASTER CARD 54T SPECIALS LIMITED QUANTITIES CABLE CONVERTERS SIGMA SIGMA 550-86 CHANNEL $ 99.95 EACH TOP CHANNEL ROLLOVER, LAST CHANNEL MEMORY, PARENTAL LOCKOUT, FAVORITE CHANNEL, SURGE PROTECTION, 4 db AMP, DECODER COMPATIBLE, 1 YEAR WARRANTY. $7". "5 EACH SLOT $75. (M) EACH 10 LOT 3>07»5U EACH 20 LOT IpOD.UO EACH 50 LOT VIEWSTAR IS HERE MXC-2520-525 MHZ remote volume remote volume control •Audio/video Baseband $129.95 ea. Output, decoder loop $95.00 5 lot Parental Lockout $90.00 10 lot Favorite channel $80.00 ea. 20 lot Remote Fme tuning NEW "North Coast" 'Excel' 66 channel remote $109.95 ea. Fine tune remote, 60 min. Sleep timer Display dimmer. Favorite channel Parental Lockout, HRC/STD Remote $75.00 20 lot Selectable Twinline A/B Select Optional $85.00 5 lot $79.95 10 lot UNITED ELECTRONIC SUPPLY P.O. BOX 1206, ELGIN, IL 60121 (708) 697-0600 m 2 03 m 3> _L (D CD CIRCLE 23a ON FREE INFORMATION CARD 54U g 2 O e _! LLt o a < ORDER DIREH 1-800-582-4044 MATH COPROCESSORS FAX DIRECT 1-800-582-1255 DYNAMIC RAMS Super Savings Special!! Order # Price Descrip tion Pins 80C287A12 49.95 Intel 12Mhz For 80286 CPU Based Laptops 40 B0387-16 99.95 Intel 16Mhz For 80388 CPU Based Computers PGA68 83D87-33 199.95 Cyrix 33Mhz For 80386 CPU Based Computers PGA68 COMMODORE COMPUTER CHIPS Order^ 6502" 6510 6520A 6522 6526A 6532 6545-1 6551 A 6567 6581 8701 82S10OPLA Price Description __ Pins ~ 2.95 MPLfwith Internal Clock 40 13.95 CPU (906107-01) 40 3.75 Peripheral Interface Adapter 2Mhz 40 2.95 Versatile Interface Adapter 40 13.95 Complex Interface Adapter 2Mhz (906108-02) 40 3.95 128x8 RAM, I/O and Timer Array 40 3.75 CRT Controller .........40 3.75 Asynchronous Comm, Interface Adapter 2Mhz 28 22.95 Video Interface Chip (906109-01) VIC-II r&p24 41464-80 3,25 65.536x4 80ns 18 41464-12 2.75 65,536x4 120ns 18 41256-80 2.15 262,144x1 80ns 16 41256-10 1.95 262,144x1 100ns 16 41256-12 1,85 262,144x1 120ns 16 41256-15 1.75 262,144x1 150ns 16 51258-80 4,95 262,144x1 Static Column,... 80ns 16 514256-80 7.2S 262,144x4 80ns 20 514256-10 6.95 262,14^x4 100ns 20 514258-80 9.95 262,144x4 Sialic Column.,.. 80ns ,....20 511000-80 7.25 1,048,576x1 80ns 18 511000-10 6.95 1,048,576x1 100ns 18 511000-12 6.55 1,048,576x1 120ns 18 511001-80 8.25 1 ,048,576x1 Nibble 80ns 18 8253 1.95 8253-5 2.25. 8254 ....4.55! 8254-2 5.95 : 8255 A5 2.75 8256 10.75 8257 255 8259 1.95 8259-5 255 8271 42.95 8272 3.75 8274 6.55 8275 18.95 8279-5 3.45 8284A 2.25 8286 2.95 8288 3.75 A80286-1 0.1 9.95 N80286-12..21.95 N80L286-8..11.95 R80286-12..26.95 R80286-6 9.95 82C284-8 4.95 82C284-12..19.95 82288-8 4.95 82288-1 2....1 9.95 8741,... 9.95 8742 1455 8748H 8.95 8749 9.95 8751 24.95 8755 11.95 STATIC RAMS (cache memory) Ord er # Price Organization Speed Pins 2101 1.65 256x4 450ns 22 2111 1.75 256x4 450ns 18 2112 2.45 256x4 450ns 16 5101 3,95 256x4 CMOS 450ns 22 2114L20 1.49 1024x4 Low Power 200ns 18 2114-45 1.05 1024x4 450ns 18 2148-3 1.9S 1024x4 55ns 18 2149-35 3.75 1024x4 35ns 13 2147-3 3.75 4096x1 55ns 18 20C71-25 6.75 4096x4 CMOS 25ns swnny c* 24 6168-45 3.25 4096X4CMOS ,45ns 20 6116LP1 2.95 2048x8 CMOS Low Power , ,100ns 24 6116LP3 2.75 2048x8 CMOS Low Power ..150ns 24 6116-1 2.75 2048x8 CMOS 100ns 24 6116-3 2.25 2048x8 CMOS 150ns 24 6516-45 4.25 2048x8 CMOS 45ns skinny &p 24 7C1 28-55 3.95 2048x8 CMOS 55ns SHimyOio 24 8128-15 2.15 2048x8 150ns 24 6264LP10 4.95 819218 CMOS Low Power ..100ns 28 6264LP15 3.95 8193x8 CMOS Low Power ..1 50ns 28 6264-10 4.75 8192x8 CMOS 100ns 28 6264-15 3.75 8192x8 CMOS 150ns 28 8167-55 3.45 16,384x1 55ns 20 6288-25 9.95 16,384x4 CMOS 25ns skKiny Dtp 22 62256LP10 6.75 32,768x8 CMOS Low ft*™ ,.100ns ,.28 62256LP15 6.25 32,768x8 CMOS Low PoMr..1 50ns 28 I628128LP8 34.95 131,072x8 CMOS LimPonr.. ,80ns 28 I 6281 28LP1 32.95 1 31. 072*8 CMOS Lo»Pow 100ns 28 Z80A, Order # Z0803008PSD Z80A Z80A-CTC Z80A-DART Z80A-PIO ZBOA-StO/0 Z80A-SIO/2 Z80B Z34CO008 Z84C1008 Z84C2008 Z84C3008 Z84C4008 Z84C4103 Z84C4208 Z8530 Price 9,50 155 1.55 3.95 1.85 3.95 3.95 2.45 5.95 10.95 5.95 5.95 8.95 8.95 8.95 4.55 80-8MHZ, Z8000 Description Pins Serial Communications Controller 8Mhz 40 CPU (MK3880-4) (780C-1) 4Mhl. .40 Counter Timer Circuit (MK3882-4) 4Mhz 28 Dual Asynchronous Receiver/Transmitter 4Mhz 40 Parallel I/O Interface Controller (MK3881-4) 4Mhz .40 Serial I/O (TxCB & RxCB Bonded) (MK3884-4) 4Mhz .40 Serial I/O (Lacks SYNCB) (MK3887-4) 4Mhz .40 CPU (MK3880-6) 6Mhz 40 CPU 8Mhz (CMOS) ..,.40 DMA (Direct Memory Access) BMhz (CMOS) 40 PIO (Parallel I/O Interface Cont.) 8Mhz (CMOS) 40 CTC (Counter Timer Circuit) SMhz (CMOS) 28 S1O/0 8Mhz (CMOS) 40 SlO/1 SMhz (CMOS) 40 SIO/2 SMhz (CMOS) 40 Serial Communications Controller 40 54V FAX DIRECT 1-800-582-1255 ORDER DIRECT 1-800-582-4044 THE ELECTRONICS SOURCE VHF - UHF RF TRANSISTORS Order t MRF212 MRF221 MRF224 MRF237 MRF23S MRF239 HRF240 MRF240A MRF247 MRF2E0 MRF262 MRF264 MRF314A MRF31SA MRF316 MRF317 MRF321 MRF327 HRF340 MRF450A MRF454 MRF4SSA MRF458 MRF515 MRF555 MRF557 MRF559 MRF607 MRF627 MRF629 MRF630 MRF641 MRF644 MRF646 MRF648 MRF6S0 MRF652 MRF654 MRF660 2N3553 2N3866 2N4427 2N5641 2N5642 2 N 564 3 2NS944 2N5945 2N594B 2N6080 2K6081 2N6082 2N6083 2N6084 Price 19.95 16.35 17.75 3.69 15.95 16.95 17.49 17.49 24.75 11.95 12.95 13.95 35.95 32.49 63.95 64.9S 24.95 63.95 9.95 14.49 .15.49 12.69 19.95 2.95 3.49 5.49 2.25 2.49 9.95 4.49 3.95 20.49 23.95 25.95 30.95 29.95 11.49 19.95 13.9S 2.95 1.25 1.25 16.95 18.49 19.95 11.95 11.95 14.95 9.89 11.95 14.95 14.95 14.95 Output Pwr, (W) Input Frequency Gain Pwr.(W) R»nfle(Miz) db/Mhz 'Pnckege 10 1.25 136-174 9/175 145A-09 15 3.5 136-174....6.3175 211-07 40 -.1 4.3 ... 1 36-1 74. . ..4.5/1 75 21 1 -07 4 0.25 136-174 12/175....„ 79-05 30 .3.7 136-174 9/1 7S 145A-09 30 ,. 3__ 136-174 10/175 145A-09 40 5 136-174 .9/175 145A-09 40 5 136-1 74 9/1 75 211 -07 75 15 136-174 7/176 316-01 5 0.5 136-174 10/175 221A-04 15 3.5 1 36- 1 74 „ ..6.3/1 75 .. . „ .221 A-04 30 0.1 136-174 5.2/175 221 A-04 30 3 30-200 10/150 145A-09 45 5.7 30-200 9/150 145AM 80... 8 30-200 10/150 316-01 100 12.5 30-200 9/150 316-01 10 0.62 100-500 12/400 .244-04 80 .14.9 100-400.. ..7.3/400 316-01 S .....0.4 30-200 13/136 221 A-04 50 4 14-30 1 1/30 ......1 45A-09 80 5 14-30. 12/30 ...21 1-1 1 60 _....3 „14-30. ...... 13/30 145A-09 SO .5 14-30 12/30 21 1-1 1 0.75 0.12 400-512 8/470 ...79-04 1.5 .....0.15 .400-51 2.. ...10/470 317D-02 1 .5 0.23 ...„ 806-960 8/870 31 7D-02 0.5 0.08 806-960 B/870 317-01 1.75 0.12 136-174. .11.5/175.... 79-04 0.5 0.05 .400-512. 2 .0.32 400-512., 3 0.33 400-51 2. 1 5 .. ._ 2.5 400-512. 25 5.9 400-612. 40 13.3 400-512, 60 22 400-512. 50 1 1 .7 100-500, 5 0,5 400-512. 15 2.5 400-512. 7 2 400-512., ...10/470 .305A-01 8/470 78-05 .9.5/470 79-05 .7.8/470..: 316-01 .6.2/470. ._ 316-01 .4.8/470.. 316-01 .4.4/470 316-01 .6.3/470 316-01 ..10*512 244-04 7.6/470 244-04 .5.4/470 221A-04 2.5.. 1 ....— 136-1 74 1 0/1 75 79-04 .,0.1 100-400 10/400 79-04 ...10/175 79-04 ..8.4/175 144B-05 ...8.2/176 145A-09 ..7.6/176 1*5A-09 1 0.1 136-174 7 1 30-200 20 3 30-200 40 8,9 30-200 2 0.25 .400-512 .9/470 244-04 4 0.64 400-512 8/470 244-04 10 2.5 .400-512 67470 244-04 4.. 0.25 1 36-174 15 3,5 136-174 25 6 136-174 30 8,1 136-174 40 14,3 136-174 ...1 2/175 ......145A-09 ..6.3/175 145A-09 ..6.2/175 145A-09 ..5.7/175 145A-09 ., 4.5/175 145A-09 1.5-30MHZ RF TRANSISTORS Order* MRF401 MRF406 MRF421 MRF422 MRF426 MRF427 MRF428 MRF429 MRF433 MRF448 MRF464 MRF466 MRF475 MRF476 MRF477 MRF479 MRF485 Output Power Price Welts (PEP/CW) Input Power Watts Gslndb 8 SOMJa . 13.49 14.99 29.95 35.95 19.49 16.95 59.95 44.95 12.49 72.95 24.95 34.95 9,95 3.95 13.75 14.95 19.95 25. 20... 100. 150. 25... 25... 150. 150. 12.5 0,125 250 15.7 80..... 2.53 40 1.25 12 1.2 3.. 40 ..1.25 ..1.25 10 15 ..0.16 ....0.4 ....7.5 ....7.5 Package ....13 145A-09 ....12 211-07 ..,.10 211-1 ....10 211-1 ....22 211-07 ....18 211-1 ....13 211-1 ....13 211-1 ....20 211-07 ....12 211-1 ....15 211-1 ....15 211-07 10.......221A-04 ..0.1 15 221 A-04 1.25 15 221 A-04 15. is. ..0.95 12 221A-04 ....1.5 10 221A-04 DL110 14.95 Motorola RF Device Databoofc..,. Weight: 4.25 lbs. TRIPP LITE-PRECISION REGULATED DC POWER SUPPLIES Complete Line of DC Power Supplies to Convert 120 Vac to 13.6VOC ±0.5Vdc. Standard Features Include; ■Solid state integrated circuit provides excellent regulation •Output voltage maintained up to 95% of no load value •High Quality littering for low noise operation -Heavy duty power transformer for complete line Isolation •On/Off Indicator light and rugged on/oft switch on faceplate •3 conductor grounded cord on 10 Amp and larger models ■Current Jimiting electronic foldback for auto overcurrenl protection -2 Year Warranty Tripp Lite DC Power Supplies Am Designed For Reliability and Superior Performance. ICS* Continuous Ripple Order* Price (amps) Duty (amps) Fusing Voltage HxWxD (Inches) Weight PR4.5 32.95 46l ..3 Internal, 0,1 Volt Max. ...3.125 x 4.75 x 8,25.. .,5 lbs. PR7 PR10 PR1S 44.95 64.95 89.95 PR25 126.95 PR40 179.95 PR60 249.95 7 .....5 Chassis Mount....0.1 5 Voft Max 3.75 x 6.5 x 7.6 7 lbs, 1 ...7.5 Chassis Mount, ...0.1 5. Volt Max, .,4,5 x 6.625 x 7.625 ...1 lbs. 15 12 Chassis Mount....0.l5 Volt Max 4.75 x 7.5 x 8.25 13 lbs. 25 20 Chassis Mount,... 0.1 5 Volt Max. .5.125 x 12.5 x 10.5 ...20 lbs. 40 .32- Chassis Mount. ...0, 15 Volt Max 7-25 x 1 2,5 x 10 26 lbs. 60 .48 Chassis Mount... 0.1 5 Volt Max 8.5 i i2.5x 10 29 lbs. 'Intermittent Communications Duty (50% Duty Cycle) SOLDERLESS PROTOTYPING BOARDS SB830 Features •Color coordinates for easy recognition ■Insertion wire: 20-29 AWG (0.3 - 0.8 mm) ■Over 10,000 Insertion cycles SB'O&U SB2390 SB3220 Price Price Dimensions (In.) Dlst. Dlst. Terminal Terminal Binding Order t t-9 10+ LxWxH Strips Points Strips Points Posts SB200 2.99 2.49 8.5x0.37x0.4 2 100x2 SB400 4.89 4.39 3.3x2.2x0.4 2 100 1 300 SBB30 5.45 4.95 6.5x1.4x0.4 1 630 SB830 6.49 5.99 6.5x2.2x0.4 2 200 1 630 SB1360 12.49 11.99 8.5x3.9x1.2 1 100 2 1.260 2 SB1660 17.45 16.95 8.5x5.1x1.2 4 400 2 1.260 3 SB2390 22.49 21.49 9.1 x6.9x 1.2 5 500 3 1,890 4 SB3220 31.49 30.49 9.5x8.3x1.2 7 700 4 2.520 4 U!MH*UM3IMMMtt*U VISA 29 17 Bay view Drive Fremont, CA 94538 1-800-582-4044 1-800-582-1255 1-510-770-2345 -5pm(PST)/10om-Spm|EST) Order Direct: Fax Direct: Customer Service: Monday-Friday, 7am F71 C0D-No personal checks, US funds ($5.00 Sutcharge) U] USPS [T| UPS [J] Federal Express [7] Airborne Add 5% of total for shipping UPS Ground ($3.00 min.). Actual shipping charges based on weight. Cull or write today for your free copy of our 1991 catalog. California residents, add appropriate sales tax. 1 1 mofltn warranty on all EasyTedi prec*atts. I warranty on all 30 day money back guarantee. We reserve the right to substitute manufacturers. Prices sebjact to change without notka. CIRCLE 253 ON FREE INFORMATION CARD s m m i 54W Be an FCC LICENSED ELECTRONIC TECHNICIAN! Earn up to $30 an hour and more! Learn at home in spare time. No previous experience needed! w o z o tr 5 LU _l LU 6 I 54X No costly school. No commuting to class. The Original Home-Study course prepares you for the "FCC Commercial Radio- telephone License" This valuable license is your professional "ticket" to thousands of exciting jobs in Communications, Radio- TV, Microwave, Maritime Radar, Avionics and more. . .even start your own business! You don't need a college degree to qualify, but you do need an FCC License No Need to Quit Your Job or Go To School This proven course is easy, fast and low cost! GUARANTEED PASS— You get your FCC License or money refunded. Send for FREE facts now. MAIL COUPON TODAY! commariD productions FCC LICENSE TRAINING, Dept. 210 P.O. Box 2824, San Francisco, CA 94126 Please rush FREE details immediately! NAME . . ADDRESS CITY . STATE ZIP CIRCLE 251 ON FREE INFORMATION CARD LESS BUSTER'S MECWmtlCS W UNIQUE ELECTRONIC PRODUCTS REGULATED WOW REGULATED, POWER ADAPTER. Ideal for Digital & Analog Electronics. Regulated Mode. variable output volt- age from 1 .2 to 13V DC, SOOmA . , MAX. Ripple less than 5mv PP Reg- ulation. 1% or better. Voltage slide switch Is a heat dissipation reducer circuit In regulated mode. Unregulated Mode: Slide switch selects 1.5-3 4.5-6-7.5-9- 1 2 Volts DC, 1 000mA MAX Control: AC-On-OII & Variable regulated Voltage, Selector Switch- es: Polarity reversal. Regulated -Unregulated modes. Unregulated voltage a~lnput voltage 120/240 AC 5076 OhZ LED power Indicator. Complete with 5 foot output cord. with 6 different power plugs. AC Input fuse & output Electronically protected, MODEL LG ?H Assembled $29.95 COLOR TV-VCR ANTENNA COMPACT SIZE (75 Ohms) UHF-VHF-FM * QUALITY VCR RECORDINGS * HIGH DEFINITION VIEWING' Ideal antenna, for confined areas, such as attics, patios, lofts. (Meet your CCfkR requirements) etc! Range 80-110 miles. (Varies with In- stallation & height). Adjustable offset Boom axis compensator & high front to back ratio, reduces VHF-UHF ghosts. Lightweight & compact size. Boom length 14" & Rear element width 74". 16 element UHF corner reflector & 5 element VMF FM yagl. Antenna price, Includes 35' fabricated T5fl RG 59 coax cable. Dr. CHAN'S Model 2023A.t21.95 C OLOR WCB AHJ&m fPIB The Arlstrocrat LG-1 Indoor amplified antenna. Is oeslghned specifically for the apartment dweller who Is not all- owed to install a outdoor antenna(VIZ Landlord, CC&R'S or a limited budget, with no cable TV fees).Ampllfler,per- mlts antenna to be located (up to 30 ft., from TV-VCR), wherever the Incoming TV signals are the stron- gest. 14dB gain VHF-FM. UHF amplifiers, will operate 2 or 3 tvs- VCRS. Output Is' 75 ohm 15' coax line with male F connector. Acc- essories included. (depleted below). tea. #1 separator, #6 3X splitter, #9 Baiun,#7 cable extender & 15', extra coax cable. Antenna oper- ation 117VAC. for any VCR-TV-FM receivers. Model LG-1..i*4.95 #_L%^=^t * 2 mas * ■* * 3 \2£r|E9 #_5 #1_: S»p*f 1 tor : UHF-VHF t W S< SSOMHt.TSQFJ lo SX 300fi.LT St SOei. #2:0ulCk Twist EW1. F Ptufl to RG SSU tou.Stii! .30 JTSrPuth on F plug to F tcretf «i Jack. 5«i. S2.sc ACCESSORIES VCR-TV-MATV-ANTEHNAS * 6 * 7 E4 - Tt in*f etnmr : UHF- VHff FU 75QFJ to 30G£l..... 75c*a. J .5 : Split f#r f Ci/mb Iners , Hytj r I d fl*v*f Jibl* . Vldw UMF - VH f; FM 73GFJ X2 75QfJ-*1.50M- 75AFJ X3 75QFJ.*2.00**. #5 jtS.F abounding block. 7 3cm, #2 : Coupling FJ2X 2*4*1,00. £S:Sw^Cii AfB DC-30QMHZ, Highj isolation, fee approve. *9'Tr*unfaTm*jfUHF-VHF/FU 75QFJ (o JOOGT 7SC#1. rP iQXK iwst® coax cam assbhbus &g -TV— i=JV»— AUT— \rcFts— M-AT~V 3.75ft. S1.50ea. ~T£=I Re-usahle-Adlustable : to a shorter length, RG-58/U 7.50ft. IZ.OOea. 7 5 Q. double shielded, low loss, assembled coax cbM*. 15,0011. sa.OOea, with 2 each re-usable screw on.QulcX Twist, male 30. oof i, S4.ooea. F connectors . (as depicted. Ho crimping). 45.00H. S5.50ea. HOW TO KEEP YOOR VCft ALIVE I MOWS (THE NITTY CfilTTY Of VCR REPAIR ) Bible ol VCR Mechanical & Electro mechanical THEORY -REPAIRS DATA. 309 Pages, over 700 Illustrations VIZ: special Section Illustrates & describes over 60 mech- anisms of 4 5 Manufactures . Save on service manual costsl A must nitty gritty manual lor the DO IT YOUR SELFERS & PROFESSIONAL TECHNICIANS BOOK: 2nd Edition, 1390 Free s&n VIA UPS. Your cost.,SZ4 9S LESS BUSTER'S ELECTRONICS® ;039 CIVIC CENTER OHIVE STE «17E NORTH LAS VEGAS, NEVADA 89030 TEL: 1-702-842-0325 •Send Money order or check. 'Minimum order ft 0.0 a. Shipping & Handling' 13. SO. OPS. Continental 46 States. others extra. orders processed Immediately, Notification sent In case of unforeseable delay, LESS BUSTER'S ELECTRONICS© and QUICK TWIST© 1 S31 LEG CIRCLE 257 ON FREE INFORMATION CARD DISTRI BUTORS The Original Combo King! 608-364-1928 - FAX 608-364-1190 ■ BRAND NEW CABLE EQUIPMENT! ■ PROMPT DELIVERY ANYWHERE IN THE COUNTRY!* ■ HIGHEST QUALITY. ■ LOWEST PRICES. ■ ■ EXPERT ASSISTANCE & CUSTOMER SERVICE ■ ■ ORDERS BY: PHONE — MAIL — FAX ■ —SCIENTIFIC ATLANTA- EACH S OR MORE ■ *SA3Combo $135.00 $130.00 ■ NEW* Fast SA3 Combo $140.00 $135.00 ■ NEW Fast SA3 (Pan Only) $ 95.00 $ 90.00 ■ *SA3 (Pan Only) $ 90.00 $ 85.00 — OAK— ■ *N-12Combo ... ■ * N-12 (Pan Only) EACH 5 OR MORE $110.00 $105.00 $ 55.00 $ 50.00 -JERROLD- ■ *SB3Combo $115.00 ■ ' SB3 (Pan Only) $ 49.00 ■ ' Tri Bi Combo $135.00 ■ * Tri Bi (Pan Only) $ 90.00 -HAMLIN- ■ *MLD Combo $115.00 ■ ' MLD (Pan Only} $55.00 5 OR MORE $110.00 $ 45.00 $130.00 $ 90.00 5 OR MORE CALL CALL -PIONEER- ■ ' PIO Combo $155.00 ■ 'PIO (Pan Only) $100.00 ■ Converters $ 65.00 50RMORE 1 Channel 3 Filters $ 19.00 $150.00 1 10 db Amps $ 10.00 $ 95.00 IRemotes $ 24.00 ' Except Wisconsin QTY. ITEM NAME ADDRESS CITY/STAT E/ZIP PHONE PRICE EACH SUBTOTAL SHIPPING AND 1. rwisrpim.T COD 1 CREDIT CARDS TOTAL TOTAL □ CASHIERS CHECK □ MONEY ORDER □ COD □ VISA/MASTERCARD # Exp. Date / / It is not the Intent of Boss to defraud any television operator and we will not assist any company or individual in doing the same. FORM MUST BE SIGNED AND SENT BACK TO INSURE GUARANTEE. WAIVER n Yes, I am paying for full service, this unit is only to be used as an extra unit. 1, WARNING: The ownership of a cable decoder DOES NOT give the owners of the decoder the right to decode or view premium cable channels wilh out AUTHORIZATION from their Cable company, 2. AUTHORIZATION: In general terms, proof of payment lo a Cable company for viewing Iheir premier channels ia AUTHOR fZATION. I the undersigned, understand paragrpahs 1 and 2 above and agree that — AS A USER: I will not use any cable proud cts purchased from Boss by myself or my company, for the purpose of decoding or viewing unauthorized perm. urn cal be channels or avoiding rightful payment to any cable company AS A SELLE R: I w 1 1 1 not se 1 1 . trade, give or dispose of any goods I have pu re hased from Boss lo any thi r d pa rty or cu stomer to w horn I know, be I levB or suspect of using said goods for the purpose of decoding unauthorized premium cable channels or avoiding rightful payment to any cable company. AS AN ADVERTISER: i agree I will not advertise, tall or communicate to anyone In any manner, that products I have purchased from Boss can be. should be or are intended to be used tor the purpose of decoding unauthorized premium cable channels or avoiding rightful payment to any cable company. Signature; ORDERS RECEIVED BEFORE NOON, SHIPPEDSAME DAY ■ NO PERSONAL CHECKS ■ NO WISCONSIN SALES BOSS DISTRIBUTORS ■ P.O. BOXI282 ■ BELOIT, Wl 53511 z s m £ m x i CIRCLE 243 ON FREE INFORMATION CARD 54Y Discover the Treasures of ADC's Electronics and Computer Components. .. | Half -Height Hard Drives 14" EGA Monitor Enjoy high contrast, high quality, text & 16-color graphics on this 14" anti- glare screen. Monitor conies com- plete with a fully IBM- compatible EGA card. (Card also runs Hercules, CGA, Lantronics & MDA software) • Resolution: 640 X 350 ■ Adjustable brightness/contrast/horizontal controls • TTL display includes 9-pin cable • Autosynching for CGA & EGA ■ Power On/Off switch & power indicator light When monitor is shut off, screen is like a mirror, Magnavox Model 8CM873. Includes EG A c ard « /* w r* fl n Item #34959 279 Original IBM Color Cards... EGA/CGA/Mono/Composite XT/ AT compatible, full-card size. Includes diagnostics and documentation for XT and AT S'5fl9'! Item #36010 NEW— jy CGA Color/Composite Add color graphics to your IBM XT or compatible. Full card size, documentation included. S^AOS Item #36009 NEW— Z9 9" Composite Monitor 12VDC Amber Screen Zenith #D59CNF1 Item #28830 NEW f 29 !)5 12 MHz Turbo 8088 XT Computer • 20Mb Hard Drive • 14" CGA Color Monitor This IBM-compatible system has a 20Mb Hard Drive for extra storage & comes complete with a 14" CGA Color Monitor! • Motherboard: 12Mhz, Turbo 8088 * Memory: 640K RAM on board • Case: standard XT •Power Supply: 150 Watt ■ Floppy Drive: 5-1/4" 360K drive & controller card * Keyboard: 101-Key, enhanced layout Also includes CGA Color Card, Hard Drive Controller, one Serial Port (socketed for 2nd), one Parallel Port, and Real-Time Clock/Calendar. $C70.(K> Item #36222 Special Savings! NEW— 57" 300W Line Stabilizer/Conditioner Protect your PCs and other expensive electronic equipment! Lightweight & portable, this unit is perfect for everyday home/office use or traveling. • 300 Watt, 2.5 Amp, 5-Outlet Protection ■ Correct and protect your PC (and other valuable equipment) from any irregularities caused by high or low-voltage interference. Small in size and lightweight ( 1 2 lbs), this unit is a perfect portable. Has a 6-ft, (detachable) power cord with 3 -prong plug. Input Range: 190-24OVAC or 96- 138V AC, 50/60Hz, Sine wave output. Max. current 2. 5 A. Dim,: 6" x 9" x 45" Item #34955 84-Key, XT/ATAuto-Switchable Keyboard V0flfcH| Number, caps, and scroll lock. Separate function-key keypad. 1 " twist-down kick-stand tilts keyboard for easier operation. 1 00% IBM compatible Item #33024 f 29 95 External Disk Drive Chassis Full Height - Fan Cooled Can accomodate: 2 full-ht. disk drives: 2 floppys, or 1 hard & I floppy drive. Input- 1 1 5/230VAC, 50/60 Hz. Dim.: ll"Wx8"Hx I2"D, Contains 60 watt power supply. Burroughs Sffft Item #14541 RFE E 59 5 20 Mb ST225 Compatible. (3- 1 IT drive | in 5- 1/4" frame.) SI CflOft Item #26533 RFE M.D™ 10 Mb | Tandon TM252. MFM interface. Item #35394 NEW */y 9S Hard Drive Controller Cards Full-card size XT, for 10 & 20 Mb Drives ■ MFM controller is compatible with 10 Mb rTM252) and 20Mb (ST225) hard drives... original IBM Item#36008 NEW- $ 29' 5 XT/AT Floppy /Hard Card * Supports up to four floppys & two hard drives • Run 2 internal & 2 external floppys. or 1 external floppy &. I tape back up * Supports 3 'A* and 5 "A rf drives, 360K, 720K,and 1.2Mb formats • Cables sold separately * . _ - - Item #34946 49 8Mhz Turbo 8088 Processor Board Build a low- cost 8088 System utilizing this board! • 2 processing speeds- Operates at Ihc slanoard speed of 4,77 Mta. or S.OMhz. • 640 K RAM capacity, 25 6 K installed! • Uses 150ns 64K or 256K DRAMs • Socketed for 8087-2 coprocessor Includes: Passive 3-slot backplane & 60W power supply. Mfr - Tall Trees, Item #32734 J H 69 XT Expansion Board Tall Trees JRAM 3 • 2Mb expanded/extended Memory Card •OK installed! • Includes 2 serial ports, clock & calendar ■ Uses 250ns 64K or 256K chips • Software included t - n „, Hem #32735 *49' 5 We car it) mi: full UM-: OF TSAI Kits ( M i ttiii run i\i,: 54Z Racetrack Sound Generator... Toot, toot! This amazing box puis you in ihe grandstand at the Indy 500! Start & rev your ngincs, accelerate to high speeds, or honk your horn as you whi2 by your opponent. Three buttons allow you to select desired sound effect. Add sounds to children's motorized toys & cars, or put one on your tyke's bike. Operates on 6-I2VDC. Works great with standard 9V battery (9V battery snaps incl.), t _ 95 SI COO Item #35904 / ea., or 2 for ' 15° 3.6V Lithium Computer Replacement Battery Item 135864 3.6V @ l.SAh, high-energy lithium battery. Dim.:2-W4"x5/8"x5/8" SC95 ,, S 10°° CS- J eu„ or 2 for 12V 6.5 Ah Lead Acid Battery Dim,: 5 VW x 3 V H x 2 '/■>" Panasonic SLCR12V6JP Item #35248 RFE $ 17 95 3V 2 " Full-Range, Dual-Cone Speaker System Perfect for car stereos, CDs and tape players... Acoustics pro vide superb impulse response. Combines high efficiency and the ability to play very loudly without distortion Woofer cones are felled & molded of graphite fiber, have a wide dynamic range and are digital ready (this makes them perfect partners for CD players). • Power Handling: 25 W continuous; 50W peak * Impedance; 4 Ohm • Freq. Response: 1 10 Hz.- 22 KHz ■ Efficiency: 1 W 500mA Input: 120VAC,60Hz, t4iM Item #22256 4 e 00 ^AMERICAN DESIGN COMPONENTS, sis farview ave, p.o. box 220,fatrv[ew,nj. 07022 YES! Please send me Ihe following items — Item Haw _M& Wo*? rtotriptiqn Ed«_ >UFSi Tout Shipping A tunOliDf we ihip rthctftiK ipcoTHd- Add 10* of tout ptm S3 Ciiudun: S3 piw P.O. cow. Chirac ody. SaJo Tu (NJ. reudenii oilty. pfeueaddtftortouh OKBER TOTAL JjOOL □ My check or maney order it enclosed. O Chirge my credit card. O Visa □ MasterCard O Amex MINIMUM ORDER 115. RE-«1 C»rd No. Exp, Date Signature Telephone: Area Code Number Vame Address rid Siate Zip All inquiries and free earning requests—call (201) 941-5000. For all phone orders, call TOLL FREE 800-776-3700. In New Jersey call (201) 941-5000. m CD m IS CIRCLE 289 ON FREE INFORMATION CARD 54AA Question: Who needs a Zenith Personal Information Terminal? Answer: With all these features and the low price, everyone! nut Mornly? Ctoto iroflt 10.000 COfa to jfcw on*f n.1f*fC6d >•»«* to I Know > ptfW? Uh lo raw the rw* (WAT art* to fli Hqm ptiitt, ch*dt ft* mSttr, Nit tf 24 tour oommuftictiswji? ATUcfi I priri* imuHUi I tor WM In ttUyai! nguhr pfww atfomifrca.'iy? SIMM up 19 3t unites bf not, dttt Of JUfc4s£on d«lng. computer tystoms? Tift » rminlrimss inc mors wtfi It* ASCII ind DEC TO! temlml ■ ASCII. DEC VT5Z inilifltn • Mlt-li 3M kind iiti Wjnf dijfi jp«d commimtoOwia? Acucti i Ngh ipetd modtfli ires cofnmunictw w*t other urn w M>WM « up rg MOO tutfl i.Mcdd ZW41-Z wty • hnlM pilitUr frt * PIhhm #. dbjiig st^mu litre* 1 Smite* for ilnflt « m>I- RS-232 port |nx-l 1-2 not I*» fkMt |nki- IIh Md • Conpuili vtdio Htpit • PremB in Btm ty olvui Mtw Ii Hiihul kti ZTX-11-Z with RS-232 $75 ZTX-1-UZ without RS-232 $50 COMPUTER BUSINESS MART 10215 Buena Vista Avenue, Suite A • Santee, CA 92071 (619)449-9040 • FAX (619) 449-7929 MasterCard — AMEX — Discover — COD — PO VISA — CIRCLE 218 ON FREE INFORMATION CARD HELIUM NEON LASER MODULE This Module contains a HeNe Tube and matching Power Supply, all in one housing. All that is needed to make the Laser operater is a 12 volt source along with a switch and pilot fight. Comes with instructions and a 1 year warranty. Makes an ideal Science Fair Project Output: 05mW continuous @ 633 nm (Red). Power Requirements: 12 VDC @ 600mA. Complies with C.D.R.H. regulations. HELIUM NEON LASER TUBES New hard sealed .5-1.0 mW TUBE. Operates on 1300VDC @ 4.0mA. '^.Nt^W^l4Gi^3t foCaaeat Wriii*t> r**f'«^ OSrteurf, *M JJZ. Lawr's Ufvl Ff^mt/or 5/wtllrr Bmmtnti WORLD ATLAS - Owr 1*0 Detailed EGA/VGA tote* m*pt and Ihomandi of facts on jo-vet arrwni, tconomT h Eonnniriutiom,. and over 70 pCtht bopiai LB ATLAS ■ Urpa in. inforaatiwi on more thin ICC US retian GAME PACK ■ Imcltfei the i fptlowvtg ftmcj- Sfj^mi Thi Abut H«U t Lift 4 D*mM. Gix JTwj, B*uc t Ue Lnti, iftd ChttamUet 20O0 The Soflwirc Burrik b SpH al Sl*t H'lih C&-ROM *£ardw*r< Punch***. CD-ROM Bundle Without lUrdTmn3i$l». Sott-nrt Bundln Ar* IBM Compatible AddHion*l THrBS AvsJIable CALL! PRINTER POWER PANASONIC KXP-4420 Laser Printer 8 Pages Per Minute * HP Laserjet II Compatibility • 300x300 DPI Resolution* 51 2K RAM • Expandable to 4.5 MB • Parallel Interface • Like New Condition • Renewed • Options are Available -17'Wxi 8' Dxi 0.5 'H CHINON FULL PAGE SCANNER FLAT BED CAMERA TYPE Includes: Utl lity Software / - — lieS' Serial Scanner Cable ( F"" , (Hooks Up To Your Serial Port} \ „ rR ComP atlt> Software, J No Kft Required Resolution: 300. 150, 120. 100 DPI PCX and TIF Format-Zoom In Image Charac ler Mode Of G raphi cs Mode/Conl rast Conlrol READRtGHT - OCR Software Only $1 99' Macintosh Interface Option Available Parallel Interface Option Available FAX Boards Are Available List $595 Fiji Manufacturers Warranty To The End User W/Chlnon DS-2000 Purchase Model DS-2000 $349 Quantity Discounts Available SAVE OVER 75% 1 Year Warranty From Panasonic ($749) Microsoft I Windows 1 3.0 Upgrade $169 »US:» Cats PANASONIC KXP-1SSS PANASONIC KXP !6W CENTRONICS- IKS CITIZEN USP.U PANASONIC KXP- 1 124 PANASONIC KXP- II 23 TOSHIBA »l 160 CPS •» NLO ■ WM . Hury Duly 303 CPS 50 NIQ . Nvraw ■ Cow Optional 24-Pin. l W CPS. S3 M.0 2 ¥•*! Wixrwtj KWtn, 240 CPS. S3 NLO. 2 Youi WimMy Itptgppiinigt-MPin- 1(0 CPS 160 CPS i 40 NLQ ■ N«M> . 2 Y«i> Wurlfflf ijQCPS-SOCPSEa: .MuTt»C«iraq» llectrif led Discounters (800) 678-8585 HOURS: Mon-Thurs 9AM-7PM Fri-Sat:10AM-6PM /-.„!*»« Himdcn.CT 06514 FAX :a i«c li>3e. rn ijfu Atlsw 3 ^kLi te f— j~ iij-^— y— ■ dhacL [Jut lh» "iffH Jiihllj illiHiMMIII n~ " 1 1 1 IIT( N 54AD GtectriFiEd WE WILL TRY TO BEAT ANY PRICE ON ANYTH ING FROM ANYWHERE!!! A TRULY PROFESSIONAL STAFF WITH A COMMITMENT TO SERVICE!!! LAPTOP LAND BONDWELL LAPTOP SPECIALS Model B-200 Laptop Special Fast - 80C86-8MHz - 640K-RAM-(2) 3.5" - 720k Drives - High Definition Super Twist LCD Nonglare Display - 640x200 CGA Resolution Parallel/SeriafflGBI Video Port Rechargeabla/Removable Nicad Battery Pack - AC to DC Power Adapter - Only 6.9 lbs. -81 Key Keyboard -13"x12"x2.2' Full One Year Warranty From BONDWELL List $1 ,079 Your Cost IncJudesDR DOS 3.41 by Digital Research (jm Model B-310-40 Laptop Special 30C286-12MHI CPU - Zero Wait Slate • 40 MB Hard Drive (JSms) | ■ 1 .44MB Floppy Dnve • 1 MB of RAM ■ Expandable to 2MB ■ 10 5" Supertwiat LCD Nonolare Display • 640*200 Resolution ■ 81 Key Keyboard ■ Parallel Port • 2 Serial Ports • CGA Video Port ■ Realtime Clock/Calendar with Lithium Battery Backup • MS-DOS 3 3/Basie • 7.6 lbs • AC Power Adapter • RecJiargabte and Removaabk* Nicad Batteries • 13"x15 ?'*:??* List $1995 Your Cost $979 MONITOR MANIA Same as above with BACKUT List S2 29 ' Supertwist Screen Your Cos! 1 1.195 MONITOR MANIA COMING SOON |BONDWEL iptop 80386SX-16MH2 • BOMB Hard |Drive • 1 .44MB Floppy • VGA LCD| Call for Pricing and Availability MONITOR MANIA AT&T CRT-327-12" TTL ... brand HI-Res . 800x480 • Tilt & Swivel List LVi.. Stat* 1 Wh»a Uonla - INCLUDES ATJT 1024HP Card &11Q n INCW $119 6-$1 1 5, 12-1108, 24-1106, Over 24-CAU. 90 Day Warranty NCR -15" -Green -TTL List with NCR - Monitor Card 640x400 $438 Save over 75% <00 1 YEAR Warranty BRAND NEW «7^» MAGNAVOX9CM082 - VGA 1 4' - Color Hi-Res - VGA Monitor • 800»«>0 ■ Oat txii.ii JT • 31 .J KHi Horiranu* Scannfca Fiaqimiey . Ill iSnMl^-Ytar Warranty >IJkeN#wCondNlon«R*n«i*«d ONLY $279 AMSTRAD COLOR VGA ULTRAHi-Res-12- VGA - Model 12HR • Till & Swivel 720x430-Anti-Glare Screen ONLY £99 6*>AA STB-VGA Extra Card 9299 .28 DOTPiTCH BRANDNEW S309 1 YEAR WARRANTY HARD DRIVE DEALS AT*T 40 MB Tact Backup Kit- Irrtomal UtCROSCIENCE HK- 1 120 - 1 22MB FtKimiw RLLSW- 1(2 Mt. WHS- i -VeaiWaramy *u« UCHOSC1ENC£a070e2MB-MFU ISMS s-tc-wS-w farm ■ I YearWanany> NEW U49 MWISCRIBE 3$7S-62MB-RLL-5 14--NEW rated -MFM -n 28US VooaCwl - AuM Cantaga lot* > 1 VauWanaKy ; I M SE"XM1E.ST-13SH-32UB-RLL-3li2- J159 SEAGATC-ST-23»-1»MB-RLL-5 1M--10HT SITS SEAGATE-ST-225-20MB-UFM.5!i4'-1£HT $149 WESTERN DIGITAL UFH-XT Coot. wCablat 5 49 RLL Contoian fw XT and ATI AvaiaUa CALLI UlNISCRiBE Wurarty- 6 lllonlnt - NEW DRIVES Soacata Wairanty - 90 Dayt - OEM Piitt QU A HrtTV PRICING AVAILABLE — CALL MICROSCIENCE MODEL 4090 1 11 MB| (Unformatted) 93 MB (Formatted) $399 1 Year Warranty 18 MS 3-1/2" w/5-1 IV Prame-RLL A MS Access Track to Track - VOICE COIL DRIVE Access Speed /4"Frai SEAGATE I | 4ftMB - Full ill 40 MS . Seapu Pulli | I ^IMortih Warranty Brand Sew Condition $169 COMPUTER PRODUCTS — Computers — * Acar Altos * Appla - Ci-na-n « Compaq • Goldstar • JCC - Le JdTEE! M_«c«a,vii*,-*saet s«»po-wt« Full Refund of HARDW ARE iiMnj»m«™i p~- - — *« » <*-r Price on all Advertised Products £££££:, £££ ",£££,£ OUJot $oa With All Offers au«, ] «uij j„ pnauvcvsp^ a»c± Au BCt I- ^|| II1HJIHH jia VISA ' Mon-Fri 9:00 am - 5 pin EST m DO m 3D CIRCLE 223 ON FREE INFORMATION CARD =L4AP v> o z o cr t- u LU -J HI Q < X learn vcn CLEANING/MAINTENANCE/REPAIR EARN UP TO $1000 A WEEK.WORKING PART TIME FROM YOUR OWN HOME! Secrets Revealed! NO Special Tools or Equipment Needed. THE MONEY MAKING OPPORTUNITY OF THE 1990'$ IF you are able to work with common small hand tools, and are familiar with basic electronics (i.e. able to use voltmeter, understand DC electronics). . . . IF you possess average mechanical ability, and have a VCR on which to practice and learn. . . .then we can teach MWVCR maintenance and repair! FACT: up to 90% of ALL VCR malfunctions are due to simple MECHANICAL or ELECTRO-MECHANICAL breakdowns! FACT: over 77 million VCRs in use today nationwide! Average VCR needs service or repair every 12 to 18 months! Viejo's 400 PAGE TRAINING MANUAL (over 500 pho- tos and illustrations) and AWARD-WINNING VIDEO TRAINING TAPE reveals the SECRETS of VCR mainte- nance and repair — "real world" information that is NOT available elsewhere! Also includes all the info you'll need regarding the BUSINESS-SIDE of running a successful service op- eration! FRK | NF0RMATI0N CALL TOLL-FREE 1-800-537-0589 Or write to: Viejo Publications Inc. 5329 Fountain Ave.Dept RES1 Los Angeles, CA 90029 LEARN TO CLEAN/MAINTAIN/REPAIR FAX MACHINES HUGE NEW UNTAPPED MARKET! EARN $65/HHI gwMw i i i in ii ■m. ^m^^^ n *^ mm ^^^ mm *^- Over 8 million Fax machines In homes/offices ■ predictions are for over 25 million by 1392! CIRCLE 261 ON FREE INFORMATION CARD LTK Work from your home/van LTK Home study program gets you started servicing fax machines in 2 weeks! LTK No special tools/equipment needed LTK Earn additional profits selling fax supplies! • Fax machines are not cheap - therefore, you can get good $$ for the repair. • Average Fax machine requires professional service every 18 months. • Home study training program includes full instructions on EVERY ASPECT of Fax maintenance/repair. FULL COVERAGE of how to set up your home-based service business. FREE DETAILS CALL 1-800-537-0589 Or write to: Viejo Publications, Inc. 5329 Fountain Avenue Dept RES2 Los Angeles, CA 90029 CIRCLE 262 ON FREE INFORMATION CARD COMPLEIE FCC LICENSE FREPAMIION * General Radiotelephone Operator's license * Second Class Radiotelegraph * Radar Endorsement _ m - _ * All Amateur Radio Licenses ♦ MORE MONEY? *A BETTER POSITION? * EXCITING CAREER OPPORTUNITIES? AN FCC LICENSE MAYBE YOUR ANSWER The FCC License Specialists We offer Home Study Courses for ALL TYPES of FCC Licenses. Formats include: TEXTS * AUDIO CASSETTE COURSES * VIDEO CASSETTE COURSES • REGIONAL SEMINARS GENERAL RADIOTELEPHONE OPERATOR LICENSE Your lob Opportunity Ticket" For years, ihe Commercial FCC license has been highly sought- after by many technicians and required by numerous employers. The General Radiotelephone Operator License has come to be known as the mosl HIGHLY RESPECTED "ticket" in the field of electronics, Formany, il has been the KEY tojob advancement and higher pay. Many companies offer immediate pay raises by simply passing the license exam. Other companies require the license for employment. When an employer sees the FCC license on a resume, he understands that the job applicant has a firm grasp of radio communications.., a firm foundation that can be built upon to meet the demands of any job situation, SECOND CLASS RADIOTELEGRAPH LICENSE BECOME A SHIP RADIO OFFICER: At present, there is a tremendous shortage of ship radio officers. This means lots of job and advancement possibilities. After a six-month training period, you may earn $45,000 to $55,000 for an eight-month year. If you are reallysharp in electronics, you can takeatest that qualifies you to become a RADIO ELECTRONICS OFFICER. If you need a review, some radio unions offer a short training program that can help you to pass that test. Radio Electronics Officers can earn as much as $60,000 to $70,000 for a six-month year. Does this sound good? All you need to get started, is the SECOND CLASS RADIOTELEGRAPH LICENSE. To assist you in reaching that goal, we have produced, "The Radiotelegraph Package". WHAT OUR SATISFIED CUSTOMERS ARE SAYING "Your STUDY QUESTIONS WERE NOTHING SHORT OF OUTSTANDING.,.Thank you for writing such a complete course." - EJ., Lemon Grove, CA T was so well prepared (hat I ACTUALLY ENJOYED TAKING THETESTS, wh Me ot he rs I ra wa roun d me we re clea rty flou nderi ng. " - M A . E. T Wa Idorf , M D The day I look the test, EVERYONE WHO PASSED HAD YOUR MATE- RIALS. - - J.D., Puerto Rico WPT Publications 979 Young Street - Suite E Woodburn, Oregon 97071 (800) 800-7588 or (503) 981-5159 Please rush me a Free Catalog. Name TA# FCCLCmnte SpKidr.ttt Address I City I | State Zip 9 m CD m j $ CIRCLE 265 ON FREE INFORMATION CARD 54AG g & LU -I LU o JflMv^ fatfr /vM» ww tor a mwJV af nm w r .V* 1'° ,"' ■^T-S— v R I r " 1 1 °'«* IS. \ f 0*400 U |S>- .™1ht I ]_>J ' OTAfl? SuperCAD Schematic Entry Software for the IBM PC & Compatibles $QQoo ONL\ ^^ *# COMPLETE PACKAGE; Easy-to-use schematic entry program for circuit diagrams Visable on-screen and pull down menus Supports popular graphic standards, mice and printers Powerful editing and drawing commands Extensive digital, analog and discrete part libraries In-depth, readable instruction manual Over 1 00 screens of on-line help information Software includes part building and netlisting Add P.C. board layout software and routing software for only *99°° each Write or call for FREE demo disk-^ \ | \/) ©i MENTAL AUTOMATION. ORDERS/INFORMATION: Send check or money orders to: Mental Automation, Inc, 5415 - 138th Place S.E. Bellevue, WA 98006 ncA o A~ Or Call (206) 641-2141 Visa & MasterCard aiders accepted! J PREMIUM PARTS*. . .THE SOURCE FOR YOUR ELECTRONIC PARTS & ACCESSORIES _ WlKWASH,..isadispsnserlhaleffectivetyarKlellKer% A i flfe^^a^^^^^cleans carbon buildup off soldering iron lips M ^ without cooling it Holds aw/r/l/i/ffifj "1 reversible cartridge wrap- milu lij 1 1 J ■ / ped with solder braid so ^«^| |U^I both sides can be used, ^^^^^^ ^^^^^J Also ho1 * 5 wet s P on 9 e ^^^^■H ^f Replacement cartridges *j am available. Dispenser • Part 8900 just 1 J CA75 Q Replacement Cartridge - Part 891 1 Just i COLD SHRINK (FUSION) TAPE . . . forms a tough, uniform, water tight, one-piece mass with no layers. It offers excellent electrical properties, water, ozone and corrosion resistance. Available n Black 30' roll (effective stretch length of 60') ... or in White 1 0' roll (effective stretch length of 20' ). Black Part 8251 5-30 White Part 8251 5-1 OW Jus.$6* S JustSS 95 CIRCUIT WORKS T "OVERCOAT PEN ma — circuit '—^3 works; Ov«fco,Ti [>*n UJ ... is a tough overcoat insulation, protection and repair in a pen. Used primarily lo repair solder mask, it insulates againsl high-voltage arcing and corona shorts. Plus it protects against moisture, abrasion, chemicals. fungus and other environmental hazards. *•> j am Part 83300 Just!510* w To order ... or for a FREE copy of our catalog call: 1-800-558-9572 or FAX: 1-414-473-4727 Ask about our PREMIUM DELIVERY Service! ijOR ^ELECTRONICS COMPANY'S P.O. Box 28 • Whitewater, Wisconsin 631 90 54 AJ CALL • FAX OR WRITE FOR A FREE CATALOG THE ULTIMATE SAVING SOURCE Call Toll Free 1-800-325-2264 or (213) 727-0054 2733 Carrier Ave. Los Angeles, CA 90040 FAX 2 13-727-6032 or 888-6032 CIRCLE 221 ON FREE INFORMATION CARD § m m 35 54AK COMMUNICATIONS AOR Scanners. Great Performance. Great Service. Great Value. Free Freight 25-Day Money-Back Guarantee Toll-Free Service and Support No Credit Card Surcharge One Year Warranty AR950 $239 AR1000 $429 1000 Channels. 8-600MHz, 805-1300MHz Standard Features: ■ Extremely compact size. ■ Continuous coverage (except UHF TV 600-805) • Antenna attenuator switch, lOdb. • Manual tuning knob, • Earphone jack, 3.5mm. • AM, FM and wide band FM tuning modes. ■ Backlighted LCD display. ■ 10' Scan Banks, 10 Search Banks. ■ Selectable Priority Channel. ■ Delay, Hold Features. ■ Selectable Search Increments, 5-955KH7.. - Permanent memory backup. • 4 AA Ni Cad batteries included, • AC adaptor/charger. ■ Carry Case. ■ Cigarette Lighter Charger. • Belt Clip. • Earphone. Options: External Speaker. Mobile Mount. MS190 $19.50 Extended Warranty. 2/3 yrs $45/$55 Specifications: Coverage: Sensitivity: Speed: IF: Increments: Audio: Power: Antenna: Display: Dimensions: 8-600, 805,1300MHz .35uV NFM, 1 .OuV WFM, 1 .0AM 20 ch/sec. scan. 40 ch/sec. search 561 .225, 58.075, 455KHz or 10.7MHz 5 to 955KHz selectable/ 5 or 12.5 steps. .4 Watts Input 9 -13.8 V. DC BNC LCD 6 7/8H x 1 3/4D x 2 1 /2W. 12oz wt. 100 Channels. Low, Air, High, UHF & 800MHz. Standard Features: ■ Extremely compact size. • Unrestricted 800MHz coverage. • 100 channels permanent memory • Earphone Jack & Attenuator. ■ Delay, Hold features. ■ Channel 1 Priority. ■ 5 Scan Banks, 5 Search Banks. ■ Telescopic and Hexible Antennas w/ BNC connector. ■ AC & DC Power cords w/ mtng hardware. • One Year Limited Warranty. Options: Base type antenna 25 to 1000MHz w 50* coax. AS300 $59.95 Mag Mnt Mobile Antenna. 15' coax. MA100 $25.00 Cigarette Lighter power adaptor. CP100 $4.00 External Speaker with mobile mount. MSI 00 $19.50 Extended Warranty. 2/3 yrs $40/$55 Specifications: Coverage: Sensitivity: Scan Speed; IF: Increments: Audio; Power: Antenna: Display: Dimensions: 27-54, 108-174, 406-512, 830-950MHz .4uV Lo,Hi. .8uV Air. ,5uV UHF. LOuV 800 15 ch/sec. 21.4MHz, 455KHz 10,12.5,25,30 1W 12.8VDC, 200MA BNC LCD w/backlight 2 1 /4H x 5 5/8W x 6 1 /2D. 14oz wt. < We offer 100's of communications products. 54AL CIRCLE 290 ON FREE INFORMATION CARD COMMUNICATIONS AR2500 $499 2016 Channels. 1 MHz to 1500 MHz Standard Features •Continuous coverage • AM, FM, wide band FM, & BFO for SSB, CW. •64 Scan Banks. • 16 Search Banks. • RS232 port built in. •Includes AC/ DC pwr crd. Antenna, Mntng Brckt, •One Year Limited Warranty. Options; Earphone. EP200 $2.00 External Speaker. Mobile Mount, MSI 90 $19,50 Extended Warranty. 2/3 yrs. $65/75 Mobile Mounting Bracket. MM1 $14.90 RS232 Control Package SCS2 $295.00 (software & cable) offers spectrum display and database. Specifications: Coverage: 1 MHz - 1500MHz Sensitivity: .35uV NFM, l.OuV WFM, 1.0AM/SSB/CW Speed: 38 ch/sec. scan. 38 ch/sec. search IF: 750.00, 45.0275, 5.5MHz 455KHz Increments: 5,12,5,25 KHz Audio: 1.2 Watts at 4 ohms Power: Input 13.8 V. DC 300mA Antenna: BNC Display: LCD, backlighted. Dimensions: 2 1 /4H x 5 5/8W x 6 1 /2D Wt. lib. AR3000 $995 400 Channels. lOOKHz to 2036MHz. Standard Features: • Extremely compact size. • Continuous coverage • Attenuation Programmable by Channel. • Manual tuning knob. •Tuning increments down to 50Hz. • AM, FM, wide band FM, LSB, USB, CW modes. • Backlighted LCD display. •4 Scan and Search Banks, Lockout in Search. • 4 Priority Channels. • RS232 control through DB25 connector. • Delay, Hold Features. • 15 band pass filters, GaAsFET RF amp. • Sleep and Alarm Features. •AC adaptor/charger, DC power cord. •Telescopic Antenna. Options: Earphone. EP200 $2.00 External Speaker, Mobile Mount. MSI 90 $19.50 Extended Warranty. 2/3 yrs. $65/75 Mobile Mounting Bracket. MM1 $14.90 RS232 Control Package SCS3 $295.00 (software & cable) offers spectrum display and database. Specifications: Coverage: lOOKHz - 2036MHz Sensitivity: .35uV NFM, l.OuV WFM, 1.0AM/SSB/CW Speed: 20 ch/sec. scan. 20ch/sec. search IF: 736.23, (352.23) (198.63) 45.0275, 455KHz Increments: 50Hz and greater Selectivity: 2.4Khz/-6db (SSB) 12KHz/-6db (NFM/AM) Audio: 1.2 Watts at 4 ohms Power: Input 13.8 V. DC 500mA Antenna: BNC Display: LCD Dimensions: 3 1/7H x 5 2/5W x 7 7/8D Wt. 21b lOoz. To Order Call 1 • 800 • 445 • 7717 In All 50 States and Canada. 24 Hours a Day. Fax Orders: 1-800-448-1084, 24 Hours a Day. ACE Communications Monitor Division 10707 E. 106th Street, Fishers, IN 46038 Int'I Voice* 317-842-7115. Int'l Fax# 317-849-8794. Service and Support Lines: Mon-Fri 9a.m. to 9p.m., Saturday 10-4. EST MasterCard, Visa, American Express, Checks, Approved P.O.'s. & C.O.D. (add 5.00) Prices ana specifications subject to change. CD m 3 3 CIRCLE 290 ON FREE INFORMATION CARD 54AM Wind Generators Generator Rewinding Welder Plans Electric Scooters It's back! The LeJay manual originally published in the 1940s is now back fn print with even more pfens than before. This manual is now a complete collec- tion of LeJay's plans and general information on 6, 12. 24. 32 volt wind generators, generator re- winding and rebuilding, propeller building, battery powered spot welders, braising welders, solder- ing irons, fencers, scooters and bicycles, DC mo- tors, llOv welders, spot welders, generator wel- ders, insect exterminators, geiger counters, light plants, and much, much more! Written for the common person to understand, this manual is a must to have for Its educational value alone!! To order send check or money order for $14.95 plus $2 shipping and handling ($4 shipping and handling outside USA and Canada) to: LJM Inc., P.O. Box 174, Dept, R, Lake City, MN 55041 PROFESSIONAL CIRCUIT DESIGN QiCAD gav Save time and money! QiCAD is a full-featured printed circuit layout package that gives you everything you need to design circuit boards quickly. • ON-UNE HELP • AUTOROUTER • POWERFUL EDITING • HPGL/DMPL PLOTS • GERBER • POSTSCRIPT • EXCELLON (DRILL) • EGA / VGA compatibile $195.00 complete price 345 W. Williams Avenue Fallon, NV 89406 (702) 423-1653 (702)423-1654 FAX PR-50 SIMPLEX VOICE REPEATER VILL WORK AS A VEHICULAR REPEATER OR A STAND-ALONE SIMPLEX REPEATER. SIMPLY CONNECT THIS UNIT TO YOUR EXISTING MOBILE RADIO OR BASE UNIT. GREAT FOR HILLTOP OR FIELD APPLICATIONS. MtAVS ONLY SOnA OF CURRENT. 149.00 NOBEL Ptt-SO HOOKUP IS SIMPLE: ]■» 1 \} y J I o ! UJ 9 Q 54AN uk Leva. Mam xcaee pos at me NIC MXtlB * in- 9-PIN cam. STUN GUNS 49 . 00 I STUN SUN EMITS 6SCV CHARGE INTO POTENTIAL ATTACKER, A MUST FOR STUDENTS, NIGHT VDRK ERS, HAIL CARRIERS, SECURITY GUARDS. PMC RAT ELECTRONICS P.O. BOX 690073 HOUSTON. TEXAS ZIP 77269 PH. -7 I 3-893-0313 ASK FOR A FREE CATALOG PH • 713-893-0313 FAX • 7 13-583- 1446 H0URS:N00N TO 6:00 M0N-FRI 9:00-1:00 SAT VINDSEEKER WIND GENERATOR VS 12-300-850. 00 aoo watts US24-400-950.00 400 watts N1NI CNM6IN6 MW£L B . 00 II CONES WITH VIRES AND DIODES! I I 12S nA AT 14V. GREAT FOR BATTERY CHARGING. STATPOVER 250 FITS IH THE PALM OF YOUR y 1= 190.00 \»TH CIGARETTE LIGHTER ATTACHMENT SINE WAVE INVERTERS MODEL pmufcTt asa PROVATT 600 TRACE SOU ania vith standby POVES ■BO WATTS 6O0 V*TTS MOP MATT aono MATT PRICE ISJLBft SOQ.PQ two CHARGE CONTROLLERS 1310 MODEL M-B 9-Aff H-16 16-AHP current I AMP _lfi_ PRICE 4t.M MM SHIPPING AMD HANDLING COST VARY AS TO THE ITEM YOU ARE ORDERING. ALL EQUIPMENT VARRANTIED FOR 90 -BAYS. CERTIFIED CHECK, PERSONAL CHECK OR MONEY ORDER. PERSONAL CHECKS HELD FDR 1-VEEK BEFORE SHIPMENT. GIANT SOLAR PANEL 3/4 AMP 14.4V 12x36 IN 44.00 EA! CIRCLE 232 ON FREE INFORMATION CARD ggg KELVI i UP TO 50% OFF LED CENTER I PROJECT PARTS Kelvin Utters batk*d by m | 2 YrWirrifHy.PifH4L*bor| KELVIN DIGITAL "jo--" MULTIMETERS I nnna|QBBi| . * » - DC VOLTAGE AC VOLTAGE DC VOLTAGE AC VOLTAGE DC CURHENT DC CURRENT RESISTANCE RESISTANCE CONTINUITY - CONTINUITY - DIOOE TEST DIODE TEST BATTERY TEST TRANSISTOR BFE 3 Irtt Diail LCD LOW BATTERY BATTERY TEST 3 1(2 Dkjlt LCD LOW BATTERY ACCURACY- .■'■ 6% ROQ ACCURACY - KEL VIN .J,05%HDa 100 Basic KELVIN s 19. 95 150 Baslc+ S 29. 9S DC VOLTAGE AC VOLTAGE DC CURRENT AC CURRENT RESISTANCE CAPACITANCE CONTINUITY. T*a ■ BdtJW DiODE TEST TRANSISTOR nFE 3 i/i Was ICO LOW BATTERY ACCURACY .'-D.5XPDG KEL VIN 200 Aav.ncto S 39. K FREQUENCY COUNTER TO20MHZ IDEAL FOR TROUBLE SHOOTWG AOOC VOLTAGE HANSES AODC CURRENT RANGES 5 FREQUENCY RANGES 5 CAPACITANCE RANGES LOGIC TEST CONTINUITY TEETEHBLZZEn DDDE CHECK TRANSISTOR HFE TEST LE D TEST YOWY GOGOBAO DISPLAY 3l,2DK3rtLCD ACCURACY ■ 0.5*. IMPEDANCE- 10 Ufoicwn KELVIN PRO 400 $6995 inn HIM "7 t**t * *" * *"" "'- T ' flinaf Manual (100 Pfla) -j pf i i'l r* pj fllv&B detAilad lnrtructton& An *j,cel^oni training, toe* covflring toptci !or Hugh StJVMl i&tgrvw A*«e*di Trade School (Beg»nnor tntfrmtcllfl*) A Oafl*gf* APtRFEcrFfTwrmtN i A^T-p«^rxtcwFW»cw.uu f VOW CWSSftXTU TEXTBOOK mum FEATURES ■ ONE DIGIT TRUE HEXADECIMAL DISPLAY WITH BUILT IN LOGIC (MEMORY. DECODER. DRIVERS! FULL ALPHA CHARACTERS ■ TWO INDEPENDENT CLOCKS - USER ADJUSTABLE FREQUENCY X DUTY CYCLES ■ BREADBOARD 50Q PT PROTO-TYPE AREA TWO POWER DISTRIBUTION BUSSES iC-m vec: ■ 4 DATA BIT SWITCHED ■ MOMENTARY PUSH BUTTON SWITCH (SPDT> ■ 4 LED DISPLAYS w IC DRIVERS ■ POWER SUPPLY WALL PLUG-IN TYPE, U L LISTED ■ VOLTAGE REG. .5 VOLTS. SHORT CIR OVERLOAD PROTECT ■ BOOK UP WIRES ■ COMPACT CARRYING CASE ■ INSTRUCTION MANUAL FOR BEGINNER TO ADVANCED USEHS WADE WITH PWDE IN THE USA FREE COMPREHENSIVE TEACHERSTltDENT LAB MANUAL ,Ht KELVIN LDT Laptop Digital Trainer ONLY $ 99. Stock No 840460 WALL TRANSFORMERSlBREADBOARDS WALL TRANSFORMER STOCX HO. TYPf ■ FamiM 220069 9V DC'500 mA . 220069 12V DC'SOO mA MALE JACK STOCKHO TYPE 370043 2.1 mm Male ■-49 m '.39 10." COMPONENTS Stock NO. TYPE , »„ .. , i, »m ...l YOUR COST 600021 555 TIMER..,,'. 20 ea 556 DUAL UVEA ... * ,40 EA LM566 PLL * .60 ea FUNCTIOH GEMHATOA 741C OP-AMP .' .30 EA PTTIHRU.LY COMPENSATED 1458 op-amp .. s .35 ea DUAL n\C OP-AMP D»P 2N2222 ..„„„.*. 18 ea PN2222 * .08 ea 7805 VOLTAGE BEO* .36 EA 600029 6O003S 600018 600026 630041 630303 600023 680100 WIRE JUMPER KIT Pre-CuL Pre-StrlpOed 330288 140 Piece Set 330290 350 Piece Set 4." 7." FLUKE 87 FLUKE 70 Satin II BEST BUY NEW Series II FLUKE 70 Series II. FLUKE 73 sent, ii . FLUKE 75 serieeii. FLUKE 77 series II, FLUKE79s.rt..ii. 63 89 1*127 ■149 M69 FLUKE 83 0*199 FLUKE 85 11*229 FLUKE 87 Iji *269 FLUKE 86 FLUKE 88 ....... FLUKE 8062A FLUKE 3060A FLUKE 801 0A FLUKE 801 2A FLUKE 6050A FLUKE 37 , FLUKE 45 . *367 *423 *329 *395 1*329 *359 1*439 *249 •579 fiOHHi, XI 1X10 SPECIAL 700072 *18. M 150 MHi. JilO 7O007S *39. W BATTERIES Duracall Euaready 9V Alkaline Battery M.95ea *1.75ea/10+ I LED *^2) 3iv As s&i^r^ ••nooo. Oly^J^ SPECIAL SPECIAL SPECIAL^ RED As Low 5n JUMBO LED r»re ■ T I l'«. Smm ITOCICNQ. YOURCOST IWO.Otr 260020 Red '.06 « too, '.05.. 260027 Green ' . 08 u i oo , * .07 ee 260026 Yellow * .08 e. 1 00, * .07 •■ LED HOLDER lorT 1 3 < SIZE, BLACK Stock No. 250015 '.10ai.'1M*QCy .06 e. 1000* Qty 0.37" 7 SEGMENT LED READOUT COST '.95. 260090 Caitai. *1 .25 STODKHO TYPE 260022 Anode 0.6" 7 SEGMENT LED READOUT stock no. Anode Jumbo, 260021 oost*1.15» ra. ot, *.99» RED LED DISPLAY Bar Graph STOCK NO. Cetor 260056 Red 260086 Green 260089 Yellow |i'?opm YOURCOST IbOtr •1.99- *1.79. *1,99- *1.79. *1.99» »1.79. MOVING SIGN DISPLAY kw F$airtoplfc>fl tat/ Qmn Mffetn SO mm STOCK HO SCOPES 20 MHz SCOPE *345 Duel Trece 2 Tr YYerrenryPprt. I Leber IC CLIPS SOLDEB TYPE SPRING LOADED SUdtHo. COLOR COST 93010J BLACK ' .65 El 19010$ RED * .65 rja IC TEST LEAD SET 5 COLOR CODED 11- LEADS WITH UMATtftUT NOOK.Ofl PttOO AT BOTH twos Stotk No. YOUR COST 990100 J 8.95 ea J. DOUBLE BANANA JACK 9V Battery SNAP & HOLDER Snap '.15aa MO ea IM* Holder s , 20 ea *.10ea/1OO+ HEAVY DUTY HI-CAD RECHARGEABLE batteries STOCKHO- TTT*. YOURCOST 220039 AAA ...» $3,30e» 220025 AA i. S2.85 SB 220027 C $6.00 ea 220037 D J6.00 ee 220036 SV $8,90 ea Soldering IRON wlttl STAND. BLUE LONG LIFE TIP S:o?kNrj MOOAt '4.50 ea Piojicl Speaker J", 9 Ohm. .1 W.ll SlOCk NO. 350009 59 tj P r o I a c I BUZZER , 3 - 9 YOU DC 80 do II Slock Ho. 630069 I '1.S9 ea I '1 .39 ea / 10+ Qty HORN ALARM Loud PvnolnUru) Sound Slock No. 640901 *.75ea 9VDC *.69 ea/10+Oty DC MOTOR lor SOLAR RDBO' Slock No. SSI111 : ,50 ea NO: .45 •« 1 20+ Qty 1.510 6VDC * Cell Chll-flU lor AAA. AA. C. Of 0Y stock no. ~—~, yourcost 2200 35 Special $9,95 «. Stock Ho. YOUR COST 3. Qty 6000M ^.SO H *2,07 FEMALE BNC TO DUAL BANANA PLUG Sloe* Ho. YOUR COST 990103 *2.95 •■ DUAL BANANA BINDING POST TO MALE BNC PLUG Slock Ho. YOUR COST 3. Qty 600059 '5.95 ee '4.95 ee BNC TEST CABLES a ft. MALE TO MALE Slock No, YOUR COST 3* Qty 9WI01 *3.45 ei *2,95 ee XENON STROBE *<> siock No. TUBE 2*0050 >2.95 ea *2.50 ea ' 20+ Qty TFHGGEH COIL lor XenonStrobe Tube sackNo 130107 M .25 ea * .89 aa J 20+ Qty INFRARED LED m Pair, LED Inlnrttt tranimlner and receiver Stock No. 260061 *2.79 aa NEON LAMP WEI. Long U.S. Stock Ho. 260003 / , M5e« f/t ».12«/iOO + Qty l PHOTO CELL CADUIUUSELEHIOE Stock Ho. 260017 *.99aa PHOTO CELL tu m h flock No. 160018 .99 aa PUSH-BUTTON S W I PUSH-ON. PUSH-OFF SlocKNo. 2T0OZ1 ».55 ea •* *.49eaM0O+Qty SUB-MINIATURE MOMENTARY SWITCH Slock No. S3B003 1 .35 ea *.28*a/100+O1y MtKIATURE TOGGLE SWITCH Stock NO. 270034 '.90 ea Type-SPST 1 .79 aa 1 50+ Qty CIRCLE RESPONSE CARD or WRITE loi our CATALOG lull Ot WHOLESALE PRICED ITEMS OVER 1 0.000 ITEMS IN STOCK ELECTRONIC COMPONENTS £ TECHNOLOGY ACTIYI1IES VISA A MASTERCARD ACCEPTED $20 MINIMUM ORDER MINIMUM FREIGHT U SILICON CONTROLLED REC11PIEB (Similar to OE C106C1] 4 AHP. 100 ptv 600014 * .89 ea * .79 easo. g-" KELVI Electronics 7 Fairchild Avenue. Plainview. NY 1 1803 CIRCLE 274 ON FREE INFORMATION CARD Call: 1 (800) 645-9212 1 (516) 349-7620 FAX:1 (516) 349-7830 m CD m ID 54AO XANDI Electronics w hVA SATISFACTION GUARANTEED! ~T ^ The use of sur- fice mount technology make* this In e smallest FM transmitter you can buy! This m not a toy, it out performs most units on I he market today. Oursemi-kH has all the surface mount parts pre- assem bled to the circuit board. XSTSOO(S) Semi-Kit $39.95 ■ ■#» The XTT10Q is a battery powered phone transmitter with a range of up to one mile. It only transmits when the phone is being used in order to con- serve battery I ite. XTT1 00(C) Kit J 32.95 The XTR100 Tracking Transmitter transmits a continuous series of beep- beep ton esth at can be received byany FM receiver. Can be used for games, contests, or as a n a nti-fh eft de v+ce. XTR1 00(C) KM $35.95 The XBD200 Quickly locates hidden transmitters in tnefrerjuency range of 1 to £000 MHz by emitting an audio out- put proportion allothetransmrt level . XBO200(C)Kit (39.95 »> 7^ The XFM100 FM transmitter has a range of up to 1 mile. It works with any standard FM receiver, it containsa built in high gain two stage audio amplifier for maximum sensitivity . XFM1 00(C) Kit % 32.95 Use the XV200 to disguise your voice, a nd make it up recognizable but un dei - UsetheXPSIOOtocallyourhomefrom • ta . nd ^ l «- Change. the pitch of your any other phone and listen in using the ™ce higher or lower than norm a I. the bufftinmicrophoneandamplinef. , results a re am sung! XPS1Q0(C)Kit $43.95 I XV200(C)Kit $61.95 The XPB1 is a telephone transmitter capable of transmitting to any FM receiver up to a 1/4 mile away. Powered by the telephone line it re- quires no batteries. XPB1 (C) KM $2 6.95 WE ACCEPT VISA, MC, CK, M0 TOLL FREE MAIL ORDERS TO: CALL 1-602-829-8152 OR WRITE FOR A CATALOG BOX 25647 1-800-336-7389 TEMPE, AZ 85285-5647 CIRCLE 264 ON FREE INFORMATION CARD CO O z o ft r- o LU < . PROFESSrONAL LOOKING X^SX EQUIPMENT REQUIRES \T FINISHED HARDWARE HARDWARE KITS FOR CONSTRUCTORS: These hardware kits contain three (jze* of electronic type hardware: In quantities of up to 50 pieces ol each 2-56, 4-40, and 6-32. witti both pan head Phillips arid flat head Phillips for a professional look. The hardware kits are available In nickel or black nickel flnlih. The lengths available are 1/8', 1/4', 3/B\ 1/2", 5/8", 3/4", and 1", with flat washers, nuts and KEPS nut? supplied in a murb- compartment plastic box There is also a metric version available wth ISO 2mm, 3mm, and 4mm wHh lengths of 2mm, 3mm, 6mm, 9mm, 10mm, 1 2 mm, 20mm, and 25mm, with flat washers, nuts and KEPS nuts. GRAND ASSORTMENTS: GA-1 USA Standard 2-56, 4-40, and 8-32 Nickel Plated S49 95 GA-2 USA Standard 2-58, 4-40, and S-32 Back Nickel Plated .... $48.35 GA-3 ISO Standard 2mm, 3mm, and 4mm Nickel Plated C4B.B5 QA-4 ISO Standard 2mm, 3mn\ and 4mm Back Nickel Plated ... $49 95 Twe/ve other assortments available and TOO tot raD^emerftsofjt^^^Mre^^^Tjefcr^afa/ga MINIATURE POWER TRANSFORMERS Miniature printed droit type transformers for email pro)ecta requiring less than 1/3 of a watt ot power. These transformers have dual primaries , 1 1 0/220 VAC, 50/80 Hz. Wiring details are kicludsd. A small foot print requiring a, little more than one square inch of board space and about one inch tall. Perfect for one or two op-amp circuits or small digital projects. Perfect for the aU-lrvone type projects. KH-QtH — 1140— i J 097S -1060- TWC BOWS AW 50C APAftt PINS ARE 200 FROM CENIER 10 CENIER PLACED IN IHt CENIEfl Of THE UMI nrr —J U-0PX7YP H HXXL S£CG«WtY VtXTAGi AC in-) aJiMi 1-9 INI !HI MP 1-5 5 24 S1O0OM.33S7.34S6 90 MPT-12 12 10 10.50 M2 7.71 7-25 MPT-24 24 S 10,75 8.95 7.89 7.42 MFT-06 64W 10 10.50 8.42 7.71 7J25 MPT-DO S41.9 B.7 10.75 8.95 7.89 7.42 MPT-012 1241.12 5 10.75 8.95 7.89 7.42 Mrr-DI5 154J-15 4 11.00 9.1B 8.07 7.59 V7S4 SES00M INC. 2100 WAflO DRNE HENDERSON, NV 690154246 U.SA S0C-S34-3457(ORDERSJ 702-MS-34O0 (FAX) 702-5S54M8 PREPAID ORDERS SHIPPED UPS GROUND NO CHARGE 2W DAY AIR tt 0.00 NEXT DAY AIR J2O.0O WE ALSO ACCEPT VISA AND MASTERCARD, CALL FOR COMPLETE CATAU3Q AND ENGINEERIN3 DIMENSIONS. WE ALSO STOCK PUNCHES AND INSTANT LETTERIN3. QUAMTY DBCOUNT 1M»10% 1MRIP20N ALUMINUM RACK AND CHASSIS BOXES FEATURES: DESIGNED FOR SMALL LOT PRODUCTION EASY TO FABRICATE {DRILL OR PUNCH HOLES) SHIPPED UNASSEMBLED (FLAT) AIL MAIN PANELS ARE FLAT FRONT AND REAR ARE CLEAR BRUSHED ANODIZED, TOP AND BOTTOM PANELS ARE BLACK BRUSHED ANODIZED, END PANELS ARE SLACK ANODIZED BLANK PANELS MOOEL DESCRIPTION CHASSIS BOX 1.75 X 19 3.50 X 19 5.25 k 19 7.00 X 19 PRICE 18 95 13.15 17 35 2150 1/8" Aluminum black enodized Dimensions shown in inches. CHASSIS BOXES RACK BOX RACK BOXES MODEL w D H PRICE ■moTJeT H L". PRICE MC-1A 4 3 ; 115 75 1RU5 1.75 5 S29.40 MC-2A I 3 i 17.85 IRU7 1,75 7 31.50 MC-3A a 3 7 19.95 1RU10 1.75 10 33.S0 MC-4A A ■'. 3 17.85 2RU5 3.50 5 31.50 MC-5A t .'. 3 19.96 2RU7 3.50 7 33 SO MC-8A 8 ■1 3 22.05 2RU10 3.50 10 35.70 MC-7A ■I J 4 19.95 3RU5 5 25 5 39.90 MC-BA 6 1 -1 22.05 3RU7 5 25 7 42.00 MC-AA a 7 .1 24.15 3RU10 5.25 10 44.10 Uimensio If 1 ■C'.v I in nches. jmsttwc ns she ,Y" n inches W« Width, D - Depth, H =• Heio, ht H - Height, D- Depth 54AP CIRCLE 233 ON FREE INFORMATION CARD ^lltek Computer COMPUTERS • PRINTERS • COMPONENTS COMPLETE SYSTEM SPECIALS AT 486 25 MHz 100 Meg HD S VGA Monitor $2200 AT 386 33 MHz w/64K Cache 80 Meg HD S VGA Monitor $1775 AT 386 25 MHz 80 Meg HD S VGA Monitor $ 1575 AT 386SX 20 MHz 40 Meg HD Mono Monitor $995 SYSTEMS INCLUDE 1 Megabyte RAM • KEYTRONICS 101 Keyboard 1:1 Hard Floppy Controller • AT Case w/Power Supply 2 Serial/1 Parallel Card TEAC 1.2 and 1.4 Floppy Drive Monitor Cl4" S VGA/12 1 * Mono) Video Controller C512K HAM on VGA) AT 286 12 MHz 40 Meg HD Mono Monitor $785 HARP DRIVES NEC 3142 44/66MB 24MS $290 Western Digital 28MS (IDE) $205 Maxtor 80MB 19MS (IDE) $350 Quantum 100MB 19MS (IDE) $430 Conner 120MB 17MS (IDE) $395 VIDEO CARDS Paradise OEM 512K $105 Genoa 6400 512K $135 Tseng Lab OEM 1MB $125 Orchid Pro Designer II 1 Meg.... $260 MOTHERBOARDS 386/33 MHz 64K Cache $550 386/25 MHz $415 386SX/16 MHz $300 286/16 MHz $110 XT to AT Upgrades Repairs & Installations Full One Year Warranty MONITORS MITSUBISHI 14" 1381 Diamond Scan $499 CTX 14" S VGA 1024x768 .28DP $360 14" VGA 640x480 .28DP $335 SAMSUNG 12" Amber Mono Monitor $79 14" VGA Monitor $317 MISCELLANEOUS 1.2 TEAC Floppy $69 1.44 TEAC Floppy ....$69 360K TEAC Floppy $63 AT I/O 2s/lp/lg $25 2400 Baud Modem $65 Dexxa Mouse $35 Logitech Mouse C-9 $69 Other items available. Call for pricing information. Limited Quantities AC 359 W. El Camino Real Mt. View, CA 94040 M-F Sat. 10-6:30 10-4:00 Call Tim Gillies 1-800-745-8984 CIRCLE 212 ON FREE iNFORMATON CARD Best Values • Quality Brands • Money Back Guarantee • Same Day Shipment SPECIAL $139.°° Model ZRMS225 Beckman Industrial 4 DIGIT TRUE RMS DMM • 0.25 % accuracy • 41 segment analog bargraph •3-year warranty Full-function, auto-ranging DMM with 4 digit, 10,000 count resolution measures DC voltage and current, resistance and true RMS AC voitage and current. (it measures DC voltage: 1Vto 1000V; AC RMS Voltage 10V to 750V; DC/AC current: 10mA to 10A; Resistance: 1 K0to 40M«; Resolution down to: 0.1 mV, 0,001mA, 0.1Q.) It features a continuity beeper, diode test, an Auto Min-Max mode, a relative mode and a probe hold mode. Comes complete with manual, test leads, battery(9V), protective holster with tilt stand and adjustable strap. SPECIAL $109.°° Reg. 139.00 Model RE380912 $129, 00 Reg. 159.00 Model RE38091F DCA/ACA CLAMP METER Functions as 3 1/2 Digit DMM Transformer jaws measure up to 400A AC/DC and a peak-hold function provides recall of AC or DC current surges. As a DMM it measures AC voltage, DC voltage, AC/DC current and resistance. The meter has the following ranges:ACV: 750V; DCV: 200mV,200V; DCA/ACA; 200A.400A; Resistance; 2000 ohms; Resolution down to 0.1 mV, 0.1A and 1 ohm. Comes complete with test leads , battery, carrying case and 1 -year warranty. Model RE38091 F also has a built-in temperature function, 0-1400°F, SPECIAL Reg. $80.00 Model REIMS Tool Case SPECIAL $299.°° Regular $365.00 Z22-IM5117 Pc. Tool Kit THE PROFESSIONAL'S TOOL CASE • Case top has built-in document holder • Case bottom is partitioned into 3 areas • Two removable pallets hold over 60 tools A handsome black case to organize and transport your valuable tools and instruments. This is the same quality case used by thousands of professional field engineers. Case is made of high impact polypropylene, and has snap-action key locks and a padded handle. Slze:171/2-x121/Zx5\ 117-PC. PROFESSIONAL FIELD SERVICE KIT The complete kit comes with the tool case described above and a complete selection of quality, brand-name tools including Diamond, Xcelite and Weller. The kit includes screwdrivers, pliers, tweezers, cutters, wrenches, alignment tools, hex driver blades and a crimping tool, wire stripper, soldering iron & supplies, socket set, penlight, inspection mirror, hammer and more. Lifetime Guarantee: Any tool that fails under normal use will be replaced free of charge. SPECIAL $139.°° Model ZC3B0660 WATT METER + MULTIMETER You can monitor and evaluate single phase transformers and ele- ctrical equipment with true power measurements up to 6000 watts with an accuracy of 1 % and a resolution of 1 watt. Multimeter functions include AC voltage(750V), AC current (10A), DC voltage (1000V) and DC Current (10A), Comes complete with manual, test leads, stand and 1 -year warranty. sm 95 Model ZAR46QD $249.* Model ZAR470D LCR METER 3-1/2 digit LCR meter measures capacitance, resistance and induct- ance with basic accuracies of 1%(C), 1%(R) and 2% (L). Features dissipation factor measurement which indicates leakage in a capacitor and Q in an inductor. Comes complete with operation manual, test clips. battery(9V] and 1 -year warranty. Features Mns!»i7sn.isnn Model IAR470D Capacitance Rauge 2M3F 10 MOuf 200[>F to 20 m F Resistance Par.ce 2M!lj in 20MI1 2ii in 20MQ inductance Range 2COnH it !H 2D0mH to 2D0H Resolution down [O: 01[tFO liiHlOOmu 0.1pF01|iH1mU Dtop-Proot Case No v„ SPECIAL $99. w Reg. 128,65 Model ZWTCPS Weller PROFESSIONAL TEMPERATURE CONTROLLED SOLDERING SYSTEM Widely used in industry. It maintains a constant tip temperature of 700 D F, Grounded tip protects components from voltage spikes. Comes with power unit, iron, stand, sponge and 700°F tip. MasterCard Terms: Visa, Mastercard or check. ORDER TOLL FREE: 1 -800-225-5370 In MA: (508) 682-2000 i4AR CIRCLE 271 ON FREE INFORMATION CARD contact east WHY SETTLE FOR LESS WHEN YOU CAN OWN A TEKl Ttektronix 20MHZ TWO CHANNEL SCOPE $695.°° Model Z2205 1 Year Warranty Engineered for ease of use with enhanced performance. Features include: 5mV/div vertical sensitivity, 10ns/div horizontal display, and flexible triggering system. Peak-to-peak Auto makes triggering virtually hands free. Also featured are: Front panel access to the z-axis input; risetime of 17.5ns; single timebase with ,05us-.5s range; single sweep, normal, auto, TV field and line trigger modes; DC trigger coupling and Ch1, 2, ext. line and vertical trigger source. Comes complete with manual and two 1 X test leads. 'REE DMM Model 2C38D1 90 with purchase of Z2205 Scope SPECIAL Model Z1610 $199.°° Model Z1611 $275.°° Model Z1630 $299.°° Sf\PfftCISIOI\l SINGLE-OUTPUT POWER SUPPLY • to 50VDC up to 3A • 1 -year warranty These fully regulated power supplies feature isolated output, overload protection and two analog monitors. <0.01% regulation (line 110V); <0.G1% load and <1mV ripple. Model Z1610 has an output of 0-3QVDC@1A, Model Z1611 has an output of 0-50VDC@2A. Model Z1630 has an output of 0-30VDC @ 3A. SPECIAL $m°° Model Z1 803 1Q0MHZ FREQUENCY COUNTER Completely automatic, has full eight-digit LED display, 1 Hz resolution with lead-zero blanking, automatic decimal point and overflow indication. Input is through a front panel mounted female BNC connectcr{1MQ, 40pFJ. Additional features include: 30mVrms, 5Hz to 30MHz, 50mVrms, 30MHz to 80MHz, lOOmVrms, 80MHzto 100MHz sinewave sensitivity and 200V (peak AC + DC) maximum input. An AC adapter charger is included or the unit can be powered by six user- installed AA batteries. 1 -year warranty. SPECIAL $29.°° Model ZC380190 3-1/2 DIGIT MINI DMM • 0.8 % accuracy • 1 -year warranty This pocket-sized DMM measures AC/DC voltage, current and resistance, plus features a diode test and signal injection. (It measures DC voltage: 200mV to 1000V; AC voltage: 200V to 750V; DC current 200 pA to 2A; Resistance 200O to2000KQ; Resolution down to 100 uV, 100nA, 0.1 Q. Signal injector 50Hz square wave, 5V peak to peak.) Comes complete with test leads, battery and instruction manual. SPECIAL $249.°° Model Z3Q11 2MHZ FUNCTION GENERATOR WITH DIGITAL DISPLAY • 0.2Hz to 2.0MHz in 7 ranges Features a 4-digjt frequency counter display. The basic outputs are sine wave, triangle wave, square wave. TTL pulse and CMOS pulse. The maximum amplitude is 20V p-p (open circuit) and 10V p-p (into 50Q load). Attenuator is -20dB + 1dB. Output impedance is 50Q ± 6%. DC offset is continuously variable, from -10V to + 10V(open circuit). Comes complete with power cord, one cable BNC to insulated clips, manual and 1 -year warranty. SPECIAL $385.°° Model 2PP4 LOGICAL EPROM PROGRAMMER • Stand -a lone mode • Copies and verifiers • Upload/download in six file formats With its 51 2K-bits of internal RAM. you can program all popular single voltage EPROMs from 2716 through 27512, including CMOS and "A" versions. Can be connected to a dumb terminal, computer, or modem, to perform transfer in six different formats. When operating in the stand-alone mode, you can directly copy and verify EPROMs via the three control switches and LEO status indicators. RS-232 port operates at 110. 300, 1200 and 2400 baud. Operates on 110V AC. SPECIAL $59.* Model ZT8/1 $189.°° Model ZLUV1 LOGICAL ULTRAVIOLET EPROM ERASERS You can now erase your UV EPROMs, MICROS and UVE Logic safely and efficiently. Model ZT8/1 has a EPROM capacity of 8, and an erasing time of 20 minutes. Also available is model ZLUV1 with an EPROM capacity of 50, and an erase time of 15 minutes. contact east, inc. 335 Willow Street North And over MA 1 845 offer Exptw Dec. si, 1991 ONE LOW SHIPPING CHARGE! Add $6.25 to total order for packing and delivery. mm «ew THE LEADING EDGE IN VGA EDSUN CEG & SIERRA HICOLOR COLOR IMAGE CAPTURE AND SCANNER USERS: HICOLOR eliminates guesswork. See accurate colors of your scanned image instead of crude posterlzed approximations. Spectacular! AUTOCAD USERS: You will be amazed at the difference In speed and claiity when you install our CEG equipped board. WINDOWS USERS: Don't settle for viewing 1/3 of a page. See 300% more with dazzling speed! HIGH PERFORMANCE WITHOUT HIGH PRICES j$W Wtuwttw tattett VGA chip tot mode. *m*m ^ coidi oil run at up to 1024 x 768 SHARP tnw pixel*. CEG card* offer apparent resolution of 2046 x 1536. Our HICOLOR cardt have 32,768 **. A Indtvldualty selectable colors. CEG COLOR carat offer unlimited color blending capability. All our card* can display 256 colon at 1024 x 768. works with any IBM compatible computer. All our cardt support Wlndowt 3.0. 72hz refresh VESA compatible CEG card wtth 1 meg S250 HICOLOR card wtth "meg S225 ET-4000 lmeg_ super VGA S150 UpaodetoCK SI 10 CEG + HtCOLOR pockaae $300 runs CEG or HICOLOR graphics (save 5 1 75) 30 DAY MONEY BACK GUARANTEE BVC Inc. 916-482-6251 mmw^^ CABLE TV NOBODY BEATS US!!! JERROLD 450 39.95 REMOTES (All) 9.95 DQN-5 69.95 TRI-BI (TVT) 64.95 PIONEER (Super Combo) 69.95 BA-5135 or BA-6110 269.95 SA-8580 269.95 ZENITH (All) 269.95 STARCOM 7 (Baseband) 299.95 TEST AIDS BULLET PROOF TOCOM SUPER CHIPS 29.95 STARCOM 6 or 7 59.95 SA-8580 49.95 ZENITH 59.95 PIONEER S1(h..\ Call 818-713-8575 800-626-1919 ag^^i:^ ELECTRONIC SYSTEMS, INC. 1001 N.W. 62nd Street Suite 306-F FORT LAUDERDALE, FL 33309 Phone: (305) 772-2242 Fax: (305) 772-2568 WHAT? 5* ©a. /50 pes. 4* ea. / 100+ pes. PN2222A PN2907A 2N3904 2N3906 2N4401 2N4403 RED, 3mm or 5mm DIFFUSED LEDs GREEN or YELLOW 8* ea. for 10pcs. 6* lor 100+ pes. LED HOLDER 5*ea, for 10pcs. 4$ ea. for 100+pcs. IC SOCKETS 6 PIN SPIN 14 PIN 16P1N 20 PIN 24 PIN 28 PIN 40 PIN .06 .08 .14 .16 .20 .24 .28 .40 50 pes. .05 .06 .11 .12 .15 .18 .21 .30 100+ pes. .03 .04 .07 .08 .10 .12 .14 .20 7805 7812 3 pes. for $1 .00 7818 28* ea. for 50+ pes. 7824 LM317T 550 ea. / 10 pes, 500 ea. /5Q pes 2N2222A 180 ea. / 10 pes. 170 ea. / 100+pcs fi MINI PUSH-BUTTON MOMENTARY - N.O. 30* ea./1 Opes. - 25* ea. / 1 00 pes. 2 x 13 HEADER 12* ea, / lOpcs. 100 ea. /50+pcs, 33UF/16V RADIAL LYTIC 0.1 UF/ 50V RADIAL MONO 25 pes. lor only $1.00 TIMERS 555: 20* ea. / 10 pes 556: 25* ea. / 10 pes OP-AMPS LM 324, LM358 3pcs. for $1.00 — ^ CABLE TIES (Bags of 1 00) 4 Inches- $1,57/ BAG 5.6 inches- $2.17 /BAG r^j KESTER SOLDER Wi SN60/40 WB lib. roll .031 DIA. $7,00 3.579 MHz CRYSTAL 7E« ea./10pcs - 70e ea.reo+pcs. ^3£> SUPER SPECIAL 50pcs Max Oty Per Order LM311 -$0.16 LM741 - $0.15 7416 -$0.15 74LSO4-S0.15 74LS244-S0.15 DIODES 10 pes. 1N4001 - 5* 1N4002- 6* 1N4004- 70 1N40O7- 90 1N5401- lid 1N540B- 150 6A1 - 190 6A10- 21* 50 pes. 4* 5* 6* 8* 10* 14* 18* 20* 100+ 3* 4* 5* 7* 9* 13* 17* 19* □ RDLINK. □ NEVER COPY FILES AGAIN! DON'T USE A FLOPPY DISK TO TRANSFER FILES BETWEEN COMPUTERS. CONNECT HARDLINK TO YOUR PARALLEL OR SERIAL PORT AND LET THE PROGRAM DO IT FOR YOU. INTRODUCTORY OFFER ,$89.95 54AT CIRCLE 268 ON FREE INFORMATION CARD *q9 fa INPUT 50 OHM SENSITIVITY BEST RANGE HOLD SWITCH The Original Handi-Counter™ Imitated but Never Duplicated *HANDI-COUNTER 2300 o irni Frequency Fln ^ I zsaaaaao batt ac-chg ,9-l2VDC Actual Size Made in the USA OPTOELECTRONICS brings you the latest in a long line of quality LED Handi-Counters™ - The New 2300. The 2300 has inherited the outstanding features of the 1200H, 1300H, 2400H & 1300HA. No other counter can match this family history. Additional new features include: • Dual MMIC Amplifiers for maximum possible sensitivity, (<1mv 150MHz <5mv850MHz <25rnv2GHz.) • Continuous Range. No cumbersome range switch. • Hi-Tech Painted Finish. More rugged than anodized cases. • 600 mA Hr. Batteries. Not the cheapest but the best! • Display Saving Power Switch. Avoids Premature LED Burn out. (Leading cause of counter failure.) • 17 years of quality and dependability to back our products. Modal Function 26O0H 2600HA 221 OA 2300 8030 3000 Freq. Period Freq. Period Flalra. interval Ralio.lnlorvaf, Frequency Frequency Frequency Frequency Range (OH* 2.BGHZ 10Hz- 2.6GHz Display 10 Digit LCD w/FundKin Annunciators 1 Dion LCD w/Function Annunciators ftF Signal Strength Indicator Price is Segment Adjustable Bargrapn S57B. 16 Soomem Adjustable Bstgrapn S375. iMHi- 2 6GH* 10 Digit LCD IMHi- 2 6GK2 lODigil LCD 16 Segment Adjustable Bargrapn $325 S225 10HI- 2 4 GHz B Digit LED S199. 8 Dig.! LED ■S99 SMHtMy: «1 mtomv typical T»i» Ban: i » «m . - zppmadsSiOO LCP MoOali N1.W1 5 AC tntw *<*&>• ndtnW aacapl tot 2300 'For J2CO. NiCM miasm. KB i AC dwow.'HUpti r, SB Carry case arvj a lul trie of ptobM ami antennas art lyaiflG*. One y*ar partas boor wananty on an products FACTORY DIRECT ORDER LINE 1 -800-327-591 2 FL(305)771-2050 • FAX(305)771 -2052 5821 NEUth Avenue-Fort Lauderdale, FL 33334 5% Shipping Handling, (Maximum S10) U.S. 4 Canada. 15% outside continental U.S.A. Viae and MasterCard accepted full range ee iqdood Model 2300 imhz-2.4ghz Frequency Counter $ 99. NiCad 23 Custom internal NiCad Pack (installed) $ 20. AC90 110VAC-9VDC Charger/Adapter $ 9. Complete Package Model 2300, Internal N.Cads & A/C Adapter $1 28. Latest Technology 10 digit LCD Ha nd -Counters '" ' w '■• z s m £ ao m J) s CIRCLE 280 ON FREE INFORMATION CARD 54AU Zener Diode Kit 5 pieces each of the following 1 wartxeners: 5.1V, 5,6V. 6.2V. 6.8V, 7 5V, 8 £V, 9.1V, 10V, 12V. 13V, 15V, 16V. 1SV and 24V. This is a comprehensive assortment of popular voltages. Each value is individually packaged and labeled. 70 pieces #RN-320-190 Electrolytic Capacitor Kit A good assortment oi useable electrolytic capacitors. Assorted capacitance and voltage values. 50 pieces total. #RN-020-910 Ceramic Capacitor Kit A good assortment of values and working voltages. Popular sizes. 100 pieces total. #RN-020^900 300 Piece Capacitor Kit One of our most popular kits. 300 piece assortment consisting of electrolytic^ ceramics, mylars, and more. Many different values and voltages. Well worm many times the cost. #RN-020-920 Value Kit A comprehensive assortment of rmolofs, switches, capacitors, connectors, lamps, transformers and more. A guaranteed wholesale value of at least $25.00. #RN-320-145 Heat Shrink Tubing Kit Kit contains 4 ft. each of the following sizes: 1r"l6', 1/8*, 1/4M/2" and 3/4 a sizes before heatmg Assorted colors. Shrinks to 50% of original size. #RN-320-170 $6 95 3 Lb, Hardware Assortment A good assortment of small wood, sheet metal and machine screws, machine bolts, nuts. washers, and other hardware. Hundreds of fasteners in different styles, sizes and finishes. #RN-081-005 CALL TOLL-FREE 1 -800-338-0531 VISA* ovic«* tR I Matching Transformer Adapts 75 ohm coax to 300 ohm twin lead (or visa-versa! antenna or television 5-90 MHz UHPVHF. 3 capacitor board type. #RN-1 80-010 F-59 Connector Populai connector for cable TV systems. Full ferrule for hex crimp. Securely holds RG-59 cable, #RN-090-355 Push-On "F" Adaptor 49' 35* • flPFft I ' 22" 16* I 50« 38* #RN-090-357 F-81 Connector (With nut and washer) #RN-090-360 40 1 30 c II «r iW-upt "F" Type Grounding Block #RN-090-338 50* 38 c "F" Right Angle #RN-090-337 90* 70* Deluxe Push-On "F" (Full attached ferrule) #RN-090-356 60 e 48* 3.5 Amp DC Power Supply A quality, compact 12 VDC power supply Perfect for testing car stereos, CB equipment, radar detectors and other 12 VDC items. Regulated 13 8 VDC. 3.5 amp continuous, 6 amp surge. LED power rndicator Binding post outputs. Net weight; 4 lbs. #RN-1 20-500 $79 M Quality 30 Watt Iron Economical 30 watt iron with replaceable tip. Blue plastic handle. 1 20 VAC. A quality Iron at a reasonable price. Display packaged. #RN-370-010 Soldering Stand Convenient weighred soklermg iron stand won cleaning sponge. Display boxed. #RN-370-020 Mini Diagonal Plier 4-1 <2" side cutters. Drop forged steel. Dipped plastic insulated handles #RN-360-010 4-1/2" Long Nose Plier Quality drop forged steel 4-1/2 inch ovefall length. Insulated, rubber dipped handles #RN-360-030 $3 75 Alligator Clip Set 1 piece set contains two of each: Black, red, white, green, and yellow. 24 gauge. 12-- 12" length. #RN-360-150 $3 25 $2 75 Cleaning Brushes Perfect for cleaning PC boards and other electronic assemblies. 8" overall length. Available with brass or nylon bristles. #RN-360-400 (Nylon) 7 g e #RN-36Q-405 (Brass) ■'* <»* Quantity pricing applies per part number only. Thruster Woofers Designed to a take a beating! Specially manufactured with the automobile environment In mind. Humidity resistant polymerized paper cones. Gives them the sound quality of paper and the durability of polypropylene. Heavy duty oversized magnets. Two color printed polymerized dust caps. Red foam antt-fungal surrounds, and structurally superior stamped frame baskets. Order* Size M ag net V.C. 2 Freq. Resp. Power C ap. SPL1W/1M QTS ts VAS List Your Cost #293-040 #293-090 #293-125 #293-150 8" 10" 12" 15" 25 oz. 30 oz. 40 oz. 50 oz. 1.5" 2" 2" 2" 4 4 4 4 35-4KHz 30-2KHZ 25-2KHz 23-2KHZ 150WMax 1 75W Max 200W Max 250W Max 95 dB 9623 dB 96.1 dB 97.85 dB .14 .12 .16 .20 39 32 28 25 1.94 3.78 7.38 19.04 $59.95 $24.95 69.95 29.95 85.95 39.95 99.95 59.95 54AV Car Stereo Patch Cables Special ertra long patch cable ta connecting low level car stereo output (RCA) directly to a power amplifier. 1 7 toot length with ground strap to cut down on interference. Bow plated connectors. #RN-24O-140 $4 2S 12" Subwoofer Box $3 95 The period high volume cabinet for dual voice coil subwoofers. Cabin el volume: 2 cu. ft. with dual ports. This cabinet really performs (and it fits in most autos). It even works well behind the back seat, in the trunk of your car, Bon comes wrtn a pre-cut1 1 " hole for a woofer and port holes Charcoal carpet covered with cany handles and Input terminals. Dimensions: 13"(H)jt 13" (D) x30" (W). Net weight: 29 lbs. too #RN-260-495 $59 12" Pioneer Subwoofer 1 2" super duty, dual voice coll subwoofer. 30 oz. magnet, 2" voice coll. 100 watts RMS. 1 45 watts max power handling capability. 25 Hi resonant frequency. 6 ohm impedance (4 and 8 ohm compatible). Sensitivity: B9 dB 1W/1M. Response: 25-700 Hi. QTS= .31 , VAS- 10.3 cu ft. Dimensions: A» t2", S. 4-3/4", C. 3-3/4". D= 1-1/2". Hole: 11-1M". Net weight: 6 lbs. Pioneer #A30GU30-55D, #RN-290-145 $39*> $36 80 Subwoofer Crossover Network Super duty, 200 watt RMS power handling capability Designed specially for dual voice co«l subwoofer systems. 12dBper octave roH-offat 150 Hz into S ohms. Crossover also features a sat of outputs 1 or use wil h your existing speaker system. Network is totally passive. requiring no power source of rts own. -10 #RN-260-220 $28* $24 Subwoofer Input/Output Terminal Tnis recessed terminal panel has inputs for right and left channels as well as outputs for right and left channels to route to your satellite speakers. Greatly simplifies subwoofer hook-up. Outside dimensions: 3-7/8" x 5-3/8". #RN-26Q-308 $3* $3 S0 £1 9\ («H*| 12 Gauge Neon Wire The competition In today's auto sound contests is so fierce that good sound alone is not enough to win. More and more installers are striving to make their installation more pleasing to the eye. Parts Express now stocks 12 gauge speaker wire ii vfbrann neon colors. This wire is the same high quality. made in the U S, wire you have used before.Txrt now it r flashy, neon colored insulating jackets. Available in neoi pink, neon green, and neon orange. Sold by tha foot. #RN-1 00-162 {Neon pink) #RN-100-166 (Neon orange) 49* /Ft. #RN-100-170 (Neon green) AGU High Current Fuses 4 Ga. DC Power Cable Largo gauge cable for running power and ground to amplifiers in car stereo installations. Sold by the foot. #RN-100-194{Red4ga.) #RN-100-196(Black4ga.) 8 Ga. DC Power Cable Large gauge cable for running power and ground to amplifiers in car stereo installations. Sold by the toot. #RN- 100- 174 (Black) #RN-100-178 (Red) #RN-100-182 (Neon Pink) 49* /Ft. #RN-1 00-186 (Neon Orange) #RN-100-190 (Neon Green) High Power Speaker Cable Extra large gauge speaker wire lor use with very high power stereo systems and for use In extremely long cable runs Rope lay construction consists of over 250 strands of 36 ga. wire. 21 picofarads per fool capacitance for use with all amplifiers. Extra thick. clear PVC insulation. Polarity is indicated by a black stripe on one conductor. Available by the foot or in SO and 100 foot spools. Please order In multiplies of 5 feet- #RN-100-151 (per foot) #RN-100-150 (50 ft.) 39* /Ft. #RN-100-155 (100 ft.) fRH47M1Q Z5A (1-1] <1E^p) 1 « 13 / 8 Ga. In-Line Fuse Holder Super heavy duly fuse holder for high current car stereo installations Sere* togeiher Baketite fuse holder with S ga wire. For use with AGU type luses or regular AGO fuses when spring spacer is used. #RN-070-800 $3 M $2 75 4-way Fuse Block Fuse block, with 4 sets of gold plated fuse dips for use with fuses. Four LEOs Indicate when a fuse is pood by glowing red. A Bridge bar is included for common connection of the Input side. Clear plastic cover allows for visual inspection of fuse status. Usee heavy duty fuses. #RN-070-810 $23" $21 M P-51 (B-Utrt 4 Ga.-8 Ga. Distribution Block Solid brass block with connections for 1 -4 ga. wire input from battery and ■i-Sga wire outputs for power to the amplifiers. Recessed sat screws hold the wire in place. Brass block Is completely insulated with dear plastic to prevent accidental shorting. Rubber plugs are included to seal set screw holes. #RN-265-800 $12*> $11 M ^ 11991 T«HS.rv Corp. 54 AX CIRCLE 235 ON FREE INFORMATION CARD SACK TO SCHOOL SPECIA LS! from ^ CIRCUIT SPECIALISTS DIGITAL MULTI METER $24.95 Order Stock *REPT-3800 * 30 ranges ' 3 1/2 digit D.M.M. ' LCD display ■ Measures: DC & AC current, resistance diode check audible continuity & transistor HFE LOGIC PROBE $8.49 Order Stock #RELP-1 ■ TTUCMOS/DTL ■ Hi/Lo/PutsaM impedance ' 20 MHZ max input frequency ' Reverse power polarity protection ■ 3- 18VDC * Completely assembled, ready to use! Not a kit!! DIGITAL PULSAR $9.95 Order Stock #RESJ-1 ' Accurate time base generator * Output: open collector pnter- facable with any logic circuits] * 4.5 - 18 VDC " 9 selectable output frequencies [16 MHZ, 8 MHZ, 1 MHZ 100 KHZ, 1 KHZ, 100 HZ, 10HZ&1 HZ] STS ON BREADBOARDS! > > > OUR BREADBOARDS INCLUDE JUMPER WIRES!! Sto cK # Bus Strips REWB-102+J 2 REWB-104-3+J 1 REWB-104-1+J 3 REWB-106+J 5 REWB-108+J 7 Terminal Strips Binding Total Contact Special Back to School Posts Points Prices o 830 $ sss 2 1360 $1137 3 1560 $1428 4 2390 $19.9$ 4 3220 $26.40 <£h l ,! > > > POMONA OSCILLOSCOPE PROBES Stock # Afln. Length Price RE 5621 RE 4550 X10 X1 &X10 4,92' 4.92' $23.80 $26.00 > > > COMPUTER PARTS Stock # REMGP REZCombo REAT10 REParadlseVGA REG6300 RERVGA2 REET4000 RE823 REB16 RESV1462 RENOV386-25 RENOV3B6-33Cache Function Mono/graphlcs/pr inter card Dual display card [CGA + MGP] + CGA emulation 2 Serial, 1 parallel, 1 game card 16 Bit VGA card with 256K * Paradise chip [expands to 512KJ 16 Bit VGA card with 256K Genoa G6300 [expands to 51 2K[ 16 Sit VGA card with 256K Renaissance RVGA 2 (expands to 51 2K[ 16 Bit SVGA card with 1 meg Installed. Tseng Labs ET 4000 chip 286 Motherboard 12 MHZ. AMI BIOS 296 Motherboard 16 MHZ, AMI BIOS 14" Color monitor super VGA [1024 X 768. .28 DP] 386 Molherboard 25 MHZ, AMI BIOS 386 Molherboard 33 MHZ, 64K Cache, AMI BIOS Price $ 14.50 f 15.50 f 14.00 $ 74.00 $109.00 $ 79.00 $129.00 $ 79.00 $ 99.00 $319.00 $390.00 $590.00 THINKING ABOUT A COMPUTER SYSTEM? Call us TOLL FREE for the latest prices on our HIGH QUALITY computer systems. Circuit Specialists manufactures systems from low cost XT and 286 systems to the latest 486 EISA & ISA power systems! or more informaiion: Call TOLL FREE 1-800-528-1417 or FAX 1-602-464-5824 Visit our Warehouse/Showroom at 220 South Country Club in beautiful Mesa, Arizona - Home of the Red Hot Deals!!! "his offer expires November 30, 1991 . C5RCLE 217 ON FREE INFORMATION CARD § m Z CD m 3D Visa, MasterCard & Discover Gladly Accepted - 1 54AY proudly presents. Laser Show Designer Make your own proffcsional laser light shows for fun and profit ! Our LascT Show Designer uses the latest most sophisticated technology to bring to you the best computer controlled light show ever ! Create animated objscts, 3D effects, text, lumia effets, abstracts that flow to the music, beam targeting, anything your imag- ination desires! Our system uses powerful on screen editing, icons, and slider bars to create any effect you want. Laser Show Designer comes with all necessary scanning equipment and software designed specifically for the Amiga computer and is upgradable beyond any other system. $2900 VHS Video $7.00 (tapc+ shipping cost) Visible Laser Diode Module Special Cit. f DM1 $99 °° Thanks to technological breakthroughs in laser mini- aturization and increaseing demand for such components we now have available the smallest most economical laser diode system ever! WIDE RANGE OF APPLICATIONS ^Pointer/Gun Sight ""Project Building *Alignment Systems *Surveying Systems *Light Shows ^Educational Equipment *Medi ca I Eq u i pm ent *H o I ography ^Detection Beams SPECIFICATIONS: ♦Requires only 3 penlight batteries. *Size: 1 .6 inches by 0.625 inch diameter. *3mW LaseT Diode ; 670nm wavelength (Red) *Beam Size: 2mm at apature ; 0.6 inch diam . at 40ft. 2-3mW He-Ne Laser Tube Power Requirements: 1700vdc @ 4.5mA Inventor)' Reduction Sale $28 each 10 for $200 FREE CATALOG Midwest Laser Products P.O. Box 2187 Bridgcview, TL 60455 (708)460-9595 Please iixjludr $7.00 for thipFNttg *nd ham] lint: H K ci. include 7% hale* in* . ATI products camr with b 10d»> uiiRfocison Etftrmtw and $0 day warranty Vw Eck Syiun. Slwtrt Module, Vote. Mgihit HMringAntalw, DUMw Atom. «* In Communl- utn. Itm Lw**ir. Ktamrt Coh. TIMS DntCM, Long, Rhh EwMdnppAr, Bumper DHpff, K AfQ kiMrhc*, fed* EnriHv, SuUMnri M mw^A i wffiMidiftdtoitotf (noMtt). Itfafdwcjlpllora PHONE COLOR BOXES I Deejgflesfl By PtKjnc rhreaks. 1 15 pTlOftt OQtQi* boxes I rjetcnboduozarridrculi.pniOfam^Pluf tali forward. I mg. con(*fwiana. phreek history Plus 50 useful arvr togal pftone orcuM plans More 4 sfttnual $29. VOICE MAIL BOX HACKING He* Vote* MM Box (YMBj tyuiiiit m utw CTd *» ipeeifc Mfl Buy Ift hac&tf WJuOB ASPEH, MES- SAGE CEM-IIR. BIX, EZ. SYDNEY, PHO*E MAIL, CELLU! AR PHOMt MANUAL Haw cellular phones at* designed, operated and programmed HOW cellular systems are yulnflfi trie to neck attacke ftftd COunrermeasure* $2$. HIGH VOLTAGE DEVICES HV devices punj town aofl. T*t*r< Prad. Ce#m Umtfwit: Tottt. ftr 'flenar'lirnirn runmtrfriigftir BJ*i far, Jacob's L»dd«r. Pfaim* end Van rfe Gi-eeJT G*m.. Fence Cfuratv. Oafa ef CftuftrW, Ozone Gen.. f.jA ^fejAfltfr, FeSI Kitter. Pfent $tlnnit*tttr, Kirtian. Mman*tu*i tic SHOCKING 1 $2$ EM BRAINBLASTER TuSotinl ,iri(J plans Iqi powerful ELECTRGM, WEAPONS and LAB DEVICES, Optimum or tuns, freqa, waveforms, intensive! Connprehen Mvt, HI NO BOOQLIHOI ftt. RADIONICS MANUAL Ex L Mi n tj, flectiontc Bno 4tH7tTOniAQMDC TThKB HtflK and d isanoiiic devices [mc*Uy tu pert men laii. History descriptions,- 1 -- SECRET & SURVIVAL RADIO -. , , n> . nn rivfli entj security rap iq equipment p nwoi- od s, frequency aJtocatiormafd voice /del! scr ambi ing y encoding Includes email i*Ce*Yei1/XmirtlerB, telDOWtry, antenna optimlzalldna, rajmotg monHMfcrw md ocKilrrX, aocunty. »urvtji!laric«. and uMriionkC,. fibftroptic and infrared cwrxno More* 70- cirviiH purni targes «t^ji, CONSUMERTRONICS 201 1 CRESCENT DR., P.O. DRAWER 537 ALAMOGOR00. KM 88310 1 -505-434-0234 FAX 1-I09-tM-0;W (OfoVt OWy) Mai-Sal gim- 9 pm MST VoVco « Morpual FAX. »prn-«km Aulo. FAX. Add M ihvip (USA. Canada All itotng srft Id ttock COOlUPScun only). VISA sna MHHfCud OK 100* More Compute* Arm Elftclronn: Otff r*»! Catal&g I) S3 ^n bunnoH sinco 1971 A» mn on TV ROBOFONE AUTODIALER Pa-*srM. v«fuiil*. manu-dnvafi pro^rmm aJlow) you is dial iny fiu mSfi (up to i QKJ Pr mix of local and lorKj dUlancc ngmb*r? >n any orw. ovif any taflflllh ol hme, •vivaihec busy of ■fir»iiVTuW*d (your cr.o.c«t and log m« times. comn'.arvrJi And riTsulm la monilor, print** anql-ordbjJt Oy1dt-d•^^lJp1o600l^lu.^rlbofl , BUSY radial Opli*nt. rjir«Cl mod»m convnaind -.rvrj Conlrpl AM T-suylt-dodfls. mclufling Vwce mid RJr>BlfW Optional jholl tolormpniil pfogeim upon Conned. Ex*t IO menu or DOS (lOi batctling). Ideal ' Wat-gim« prj*ar dialer, phone cflll loggaf and i^ernailwUrKi ' " t2t. HARD DRIVE MANUAL (•mptaiu on PCs) Mow 10 Mitel inhiSc*. m*»li-i e Ml up. UK. malnlam. trOuW«*ftoo1 and repair them How lo protoci thtrn rrom misu.kn. labotage, prviftfl eyes, jiickv hnaen Kowtort*»vtrdiBjn«gtdandrFOipi riiaa includes tofTwara Advice and litr, JJS. DISK SERVICE MANUAL Mflrnlaln, hroubieshoot, repair adjual, errfln rli d i ives #JlhO-jt special equiptne^i Lew sori* a r e . 5. ISSf, PC/XT/ATJ3*t/4t*. AM. ' KarpTO, Ttntfv. fpion. jltarf. T). HP. DEC, elc id rtauhv uDkeeo £Ml DISK DRIVE TUTORIAL nappy rji-jva*. aimxs FDCs. lormanjng. kortware ofpiffciion Sysiems de- ' aovfca and tips an " COMPUTER PHREAKING maasur em. IncJuOM disTwhn 2S0K* of Iwc**- MkC IHaa, and uhliliM. and kioendary F LU »H OT+ w 0*Kl«*i syaiem i.Ed Cho*ce>C Hegufnel Owens ofconpunar ■yaatrrii are ptrwirrted, 60S novice, petseword wy, mucn mortf Wanuei* * JCW«' JH BRAIN VIRUS ANTIDOTE 1 ntfitutions, businesses. The mildly destrucEivfl Of 13 mil version has oean hacked inlo riighly vimlen't Atrarhs BVA consiela. Ol the anlrJole, source COOO And wrUe- up rn»k« (HOT Inltcted) tti. TV DECODERS/CONVERTERS || BEYOND VAN ECK PHREAKING jnw' Tv eecodeu aivi STEALTH TECHNOLOGY Police isdflr is iaie^naimoj H also has- chut rales of iQAfc-ZOW Every known Error mode - Utlhod and rniserifli io minimize radar refleclion* - Strategy and tacMc to lifjrn unjust radar tickets (lhat posi you a ion urn? in insuranqei - Mothrxt to detect and ja,m sioials - lullv descriptdr tH. NEW CIRCUIT DESIGN CONCEPT pert board designs- much lesi rats ofione chemicals, burns, bad solders, cooked parti eic. Compact eflcienl, versanla. (ow-ncHifl, reJiable shape, aiie. layout Easy to trouplMhoot and make deugn changes Relnliveiy inexpensive Easy io integrals #nh ch»ses. convoys, conneciors. displays, power suppites. etc Assemble cifcu'ils rusl about anvwhwe £l§ KW-HR METERS ■ many}, ANSi Standards, etc: Demand,' Pole and PpJyphaM MatefS, EKperirnefttal i«y.'ti $13.. STOPPING POWER METERS At reported on CBS 40 MIMUTESl How certain e*ecuH- caf toeda (simply pfaga into an ouitet( can alow down wanncfUr melen - everi step (hem - WMf orewfOQ kill laifJil ,i*.l'ii dflTcnpoi TriOltf croop, ovrjil sad tire c j $19. THE I.G. MANUAL GAS FO ALL! I cvety known vulnoFamlily Ol j | pumpa and dtsp^nsera $1$. LIBERATE GAS & WATER SURVIVAL GUNS & AMIVIO I Describes optimum gum amd ammo, converaions. I Siltneefl, 4'ptOfJ-^e Oevices imprO*isetf weapons ROCKET S RED GLARE I sur^ivaJ roc&Btt Special ipmpnaats on the SormLilarrwi. I manuracture and mstahaiion of p/opetenta, nwtert. I ranrtet-i. etc includes Hat ol coowwrily avadabfe rnate- I ™^AJIdVtade*Oh cJ launcJi pads and e4ao*onic* *t° r VOICE DISGUISER Errecr/ve a^aJnai troops u*mg voice aiiaJyzeri to conceal rjender 1or women living alone Tor anli. i n trusion syslems. for mu vc accompan ijrient lor gags Voice sounds ni!n riii 119 SECRET & ALTERNATE IDS maintained by creaii bureaus and sbvernmenrs. your unity and iulure survival are aigreal risk - unless you eon escape under a secret end alternate ID Legal methods detailed Not a rehash ol the Paper Trip books iu Ordinary TV 1 Ranges up to 1 KM H*. .. measures Inctudtt legial Van Eck nut, and 1 ixigmal Top Secel Van Eefc d ie tgn t IZt ATM Cfimes. abuses, security, vuinerabilitm? 100- melhoos deaenbed • from ■Reg E io ciphers Case histories, law, ccuntermeasure-s. detailed security checXtist tntarnal photos, figuies^Slill unsolved One crooii stole S?3r*.CXKi from or-e bank's ATml $39, ABSOLUTE SECURITY DOZtmoJ Simple, versatile, secure cormpuler lepurtty methods and ups Plus our invulneraote Cipher Programfin COM and ils.BAS Source) PiuS^LOOO cipher contest mtee wrth Ciphtrtexf Manual * Drtk" $24 CRYPTANALYSISTECH. Five powerlul menu -dnvencryplo program; |in COM and Utter BAS sources) 10 analyie. decrypi ^secure" cipherioxts. Worked-oul examplrrt Reco-mmanded In th« prtsiiprOUT COHPUTERS £ SCCURtTY, Manual * STOCKPRO Untflju*. pOwertuf. eilrewd, unCOnyanaofiad common siKkinvfleimenisiTategTr Cfentedror NWSU.andoaui of axpenafve c^ooeuttina ivtiem Manuel + Dkk* $29, PRINTER/PLOTTER MANUAL serial). DeteHed pLaAt for X-iwrlcJws, buTrWs, and aeoa^to'ptraM arid ponaW -to- serial int^^ out devtcea Many buy, uae, senrice, ftparr ftps $14. SOFTWARE PROTECTION iot «nlertenng with. ieg>l i 3 defeat Ha specaTtgji w i1*i a r, i other nrr imr liiQfi 3 CONS & SCAMS Cons and acama fleece Amerkcanj. of ft $5Q-t BllClon per year! The mosi comprehensJve rnanuel on cons And scums ol ill Kinds from tha clauic lo the high teen Dateil* on hundreds Of cons and sca.m* and fteir many variations and counter measures Fraud is ramuanl ■ [WGrkicI yoursetpi 13&. SPECIAL PROJECTS We design build, repair modify. maintjr.n anrd consult on any device, system or protect ■ computerized, electronic, electrical, mechanical, optical Many LnvenUon prototypes ConFtdenliallty guaranteed Describe and include $25 lee ((Joes noi obtrgate you] We then provida you coat time estimates TECH RESEARCH SERVICES Unique St *K electronic and computer d*Mn arhtfrW in database accessed by iitta and subject Digital. «p. hC analog, nytHtrJ, nomograph sottware Provwie ua keya. we return list $2S search lee (1 -20 keywords/ ptiraaea, you may combine unrelated topics) Saves. you RID ISS Powerful RES-SNAP program will allow your own searches Uim popular electronic books. magazines and your Me*. Disk" I* S, 'AM software supports all IBM-PC and com pal. bio system* ('&&-'4WJ SOLD FOR EDUCATIONAL PLHVCrlCS 0*H.T 54A2 CIRCLE 292 ON FREE INFORMATION CARD CIRCLE 219 ON FREE INFORMATION CARD Cable TV Equipment We Have The Best Quality Control on Zenith Equipment. Give Us A Try. Quantity 1 5 10 20 NEW PRODUCT Zenith Z TAC All in one Anti-Flash Converter Descrambler Remote Control Audio Video RCA Jack, Dual Cable Capable, volume Control. Loaded with features. 249. 199. 169. Tocom 5503 All in one Converter Descrambler, Remote Control, Volume Control. 249. 209. 189. Scientific Atlanta 8500 Series All in one Converter Descrambler & Remote 189. 159. 149. Scientific Atlanta 8535 All in one Converter Descrambler & Remote 229. 189. 179. Hamlin CR6600M All in one Converter Descrambler & Remote 139. 99. 89. R&C56 All in one Converter Descrambler & Remote 129. 89. 79. Oak M35B All in one Converter Descrambler Mauel Pile. 59. 39. 35. Jerrold 400 DRX-3DIC All in one Converter Descrambler & Remote 109. 89. 79. 69. Jerrold 450 DRZ-3DIC All in one Converter Descrambler & Remote 119. 99. 89. TRY OUR NEW PIONEER DESCRAMBLER REMOTE CONVERTERS Stargame 2000 89. 75. 65. 60. Panasonic PZ PC1453G2 89. 76. 71. 66. Jerrold 450 DRZ-3A 65. 55. 49. 45. ADD ON DESCRAMBLERS TB-3 79. 55. 48. 45. FTB-3 79. 55. 48. 45. TVT-3 New Digital Trirnode 99. 75. 68. 63. SB-3 69. 49. 43. 39. SA-3B 79. 75. 48. 45. MLD-1200 69. 49. 39. 35. Pioneer Add On 139. 109. 89. 79. All Orders Shipped U.P.S. (800) 822-9955 HOURS: M-F 10:30 AM-5:30 PM Pacific Stan. Time CABLE PLUS 14417 CHASE ST., SUITE 481 PANORAMA CITY, CA 91402 NO CA SALES Customer Service (818)785-5104 m m § CIRCLE 216 ON FREE INFORMATION CARD 54BA We Sell QUALITY PARTS • We Have DISCOUNT PRICES • We Ship FAST nMnH INFRARED SECURITY LIGHT (AS-IS) Electriko # SIL-101 - Experiment with infrared sensors with these outdoor security lights. Contain lots of interesting components, an IR detector, photo resistor, relay, transformer, IC's, voltage regulator, capacitors, trim pots and other goodies. Returned to the distributor for variety of reasons, we've found that most of them work to some extent. We don't want to test them and would prefer to sell them "as-is* at a greatfy reduced price. Mounts to any standard electrical junction box. Infrared sensor detects movement up to 65 feet and turns on tights. Sensor can be adjusted for sensitivity and duration of lighting. The position of the sockets and the infrared sen- sor can be easily adjusted. Will handle two 150 watt FAR 38 lamps. Suitable for wet locations. Bulbs not included. CAT* IL-101 $7.50 each CABLE TIES & CRIMP CONNECTORS TR-400 TR-4G0B TR-600 TR-eooB TR-800 TR-800B TR-11M TR-1100B TR-1500 Heavy-duty TR-1500HD 15* APPRO* LENGTH 4" 4" 6" 6" 8" 8" 11? 11* 15- 18 lbs 18 lbs 30 lbs 30tbs 50 lbs 50 lbs 50 lbs 50 lbs 50 lbs 15-cabte 120 lbs COL OH neutral black neutral black neutral black neutral black neutral tie. neutral HtX. ■UNCLE HA. 15/16* 15/16* 1 1/2" 1 1/2" 13/4" 1 3/4" 3" 3* 4* .30 .35 .50 .50 .60 .70 .70 .80 $1.00 $2.50 $3.00 $4.00 $4.00 $5.00 $5.00 $5.00 $7.00 $8.00 $15.00 $17.50 $30.00 $30.00 $40.00 $50.00 $50.00 $60.00 $70.00 4 1/4* $1.50 $12.00 $100.00 INSULATED CRIMP TERMINALS QUICK DISCONNECT MALE 1/4" CXD CAT* WIRE SIZE COLOR MKS 100 PCS S00PCS 1.000 PCS 2125 22-18 RED 2.50 4.50 20.00 32.00 2225 16-14 BLUE 2.50 4.50 20.00 32.00 2325 12-10 YELLOW 3.00 5.50 26.00 50.00 QUICK DISCONh IECT FEMALE 1/4" CD® CAT* wire sue color 90 PCS 10 PCS W0 PCS 1.000 PCS 1125 22-18 RED 2.50 4.50 20.00 32.00 1225 16-14 BLUE 2.50 4.50 20.00 32.00 132S 12-10 YELLOW 3.25 6.00 27.50 52.00 SPADE TERMING MS ep€ UX£ CAT* WIRE SIIE COLON *T< ID Wit JO PCS 1NPCS 900 PC* 1,000 PCS 9106 22-16 RED 6 2.50 4.50 20.00 32.00 9108 22-16 RED 8 2.50 4.50 20.00 32.00 9110 22-16 RED 10 2.50 4,50 20.00 32.00 9205 16-14 BLUE 6 2.50 4.50 20.00 32.00 9208 16-14 BLUE 6 2.50 4.50 20.00 32.00 9210 16-14 BLUE 10 2,50 4.50 20.00 32.00 9308 12-10 YELLOW 8 3.25 6.00 27.50 52.00 9310 12-10 YELLOW 10 325 6.00 27.50 52.00 We have a wide selection of butt connectors, ring terminals, end caps, quick splice connectors, end piggy-back 1/4" connectors. CALL for a quote on larger guanines or other styles. 6 AMP 200 VOLT FULL WAVE BRIDGE RECTIFIER Diodes Inc. # RS 602 or equiv. CAT#FWB-602 85c each DUPLEX A.C. RECEPTACLE Levi ton dual grounded, 3 wire convenience outlet. Easy hook-up; just push stripped wire into holes in back. Screw terminal for ground wire. Rated 1 5 amps @ 125 Vac. UL listed. Available in brown only CAT* DACS 50f each • 5 for $2.25 BA TTERY PACK (USED) Four AA nickel cadmium batteries connected in series to make a 4.8 volt pack. Batteries are in a 2X2 conffguration with a 2 pin connector attached. The four batteries can be separated into single AA size solder tab nickel cadmium batteries or resoldered into other configurations. CAT#NCB-41AAU $3.00 per pack ■ 10 for $25.00 THERMISTORS -*cs> =■©- TT# 33A252798-1 9 0.43" dia., axial leaded ther- mistor. Narrow temp, range; approx. 6 ohms at room temp. Goes to ohms when heated, 12 ohms when frozen. CAT#THR-4 5 for $1.00 100 for $1 5.00 • 500 for $60.00 750 ohms @ 70 degrees F. Negative co- efficient. Resistance drops as temperature rises. 0.1" diameter, 1.5" long leads. CAT* THR-7 2 for $1.00 • 100 for $45.00 0.4" diameter friermistor. Positive temperature co-efficient. 37 ohms at room temperature. 10 meg ohms when heated with a match. 0.6' iong leads. CAT*THR-8 2 for $1.00 CALL OR WRITE FOR OUR FREE B0 PAGE CATALOG WITH OVER 4000 PARTS! OUTSIDE THE U.S.A. PLEASE SEND $2.00 POSTAGE FOR A CATALOG TOLL FREE PHONE ORDERS t -800-826-5432 MAIL ORDERS TO: ALL ELECTRONICS P.O. BOX 567 VAN NUYS, CA 91408 54BB We're Committed To Serving You And We Won't Be Satisfied Until You Are! 200 ASSORTED PARTS Strips of assorted parts. Each strip contains an assortment of resistors, capacitors and diodes. Each strip contains at least 200 parts. CAT#GRABTR $2.00 per assortment ONE MINUTE TIMER Originally used as a game timer this white box with a blue button will drive you crazy. Box measures 3 1/4" square X 2" high. When the button is pressed 4 LEDs light and a beeper pulses. Every 15 seconds one led goes out and the speed of the beeping increases. At the end of 60 seconds the unit gives off a tang beep followed by a low squelch, all LEDs shut off and the unit stops. If at any time during the cycle you want the unit to stop, press the blue button and the beeping stops and in ten sec- onds the unit shuts off. Unit requires a 9 volt transistor battery (not included) to operate. CAT# TMR-1 $2.25 each ■ 10 for $20.00 9 volt Alkaline battery CAT#BAT-9 $2.00 each XENON FLASH TUBE ■^s= 2" long X 0.1 5' diameter. 2" long wire attached to one end. CAT#FLT-6 75«each 12 BUTTON KEYPAD 1 2 button telephone keypad, ivory finish, 2.83" x 2.2" x 0.S8" thick. Matrix encoded, deal for telephone or security keypad. CAT#KPT-1 $1 .00 each 10 for $9.00 FLASH ASSEMBLY \)h New compact flash assemby. Operates on 3 Vdc and measures 21/2"x1 1/4". Idea! for use as a strobe, warning light or attention getter. Includes hook-up diagram. CAT#FSH-1 $3.75 each 10 for $35.00 • 100 for $325.00 24 VDC CONTACTOR Potter* Batmfie!d# P25P42D12P1-24 3 pole single throw heavy duty contactor. 25 amp contacts (30 amp resistive). 24 Vdc 133 ohm coil. Field replaceable silver-cadmium oxide contacts. Used to control motor loads, lighting and primary power in all kinds of equip- ment Mounting plate not included. 2.7" X 2" X 3.2" high. UL and CSA listed. CAT#CNR-1 $15.00 each MINIA TURE GEAR MOTORS Soho# GBL 35-DH-21 080- 10Y Powerful little gearhead motor. 40 RPM @ 12 Vdc. 0.5 amps (no load). 32 RPM with load. Operates at lower voltages with reduced speed and torque. 6.3 pound inches torque. Stall: 27 pound inch- es. 3.1" long X 1 .375" diameter. Shaft: 0.1 sr da X 0.75" long. CAT# MOTQ-14 $11. 50 each • 10 for $100.00 UOJf. Buehier series 61.13 Miniature DG gearhead motors. Reversible. Motor and gearhead enclosed in rugged die-cast housing. 1.55" X 1.122" X 1,475". Long-life bronze bearings. 0.1 15" diameter flat- ted shaft. 38 volts dc (nominal) @ 70 ma. 274 rpm @ 24 Vdc (no load) 451 rpm @ 38 Vdc (no load) CAT# MOTG-38 $5.50 each 3 OUTPUT SWITCHING POWER SUPPLIES 40 Watt Supply XentekS XSW40 - Input: 1 10/220 Vac Output: +5 Vdc @ 2.5 amp +1 2 Vdc ® 2,0 amp -12 Vdc@0.1 amp Regulated supply with overvoltage protection and adjustment on the 5 volt tap. 6.3" X 3.9" X 1.55" high. CAT#PS-40- $12.00 each 60 Watt Supply Xentek Series XSW60 - Input: 1 10/220 Vac Output: +5 Vdc <§> 5.0 amp +12 Vdc @ 2.5 amp -1 2 Vdc @ 1 .0 amp Regulated supply with overvoltage protection and adjustment on the 5 volt tap. 6.3' X 3.9" X 1.72" high, CAT#PS-6Q $16.00each 340 Watt Supply Summit Electronics (Basler)# CX340-9014 Input: 120/220/240 Vac 50/60 Hz Output: +5 Vdc @ 50 A +12Vdc@6A -12 Vdc® 1.5 A Regulated switching power supply. 1 2" X 4.875" X 4.125" high. Input through standard IEC 3 prong receptacle. Output through molex type plug. On/off switch, fused, thermal protec- tion. UL and GSA listed. A lot of power for the price. CAT#PS-340 $29.00 each CRYSTAL SPECIAL fl HU-18/U Style 6mhz CAT#CRY-618S 10mhzCAT#CRY-1018S MINIMUM ORDER 100 PIECES 100 of one VALUE $75.00 500 of one VALUE $300.00 TOLL FREE ORDER LINES 1 '800-826-5432 FAX (818) 781-2653 • INFORMATION (818) 904-0524 Minimum Order $10.00 * All Orders Can Be Charged To Visa. Mastercard Or Discovercard • Quantities Limited * California, Add Sales Tax • Shipping And Handling $3.50 For the 48 Continental United States - All Others Including Alaska, Hawaii, P.R. And Canada Must Pay Full Shipping ■ Wo COD. * Prices Subject to change without notice. CIRCLE 249 ON FREE INFORMATION CARD 54BC # HITACHI V-212 REG. $525.00 SALE $419.95 iz-mu vc-m* VC-«0!5 Analoq (Hcllloscopel ISi fHl. Oual Oinnel 60 Wl. Dual Channel, Delayed Sheep, CRT ^jdout 50 fJHl, Ot,al Channel, Delayed Sweep, CRT Hea cf out. Cursor ^su^nem, Counter 100 Hii, Dual Channel, Delayed Sweep, CRT Readout 100 !Wr. :m! Channel, Delayed Sweep. CRT Readout, Cursor Jteasurement. Counter Digital Storage Oscilloscopes 20 rWt, ! Ct), 20 KS/J, 2 KK/Ch. RS-232 50 MHl, 2 Ch, 20 "B/l, 2 WCtt, RS-232 50 HHl. 2 Ch, 20 H5/J, 2 XU/CI>, Sweep Auto range, R5-232. 100 mt. 2 Ch, 40 K/l, 4K Wen, Sweep Autaranqe, RS-232. 100 mi, 4 Ch. 1TO MS/i. 4X Ileal. Sweep Autorahge. RS-232 *i'i.ui 119.95 1J45.0I) t 189.05 154?. 00 1285.95 1645.00 1365,95 [895.00 1645.95 1995.00 1745.95 2295,00 2045, 5-5 2595.00 2189.95 3355.00 3045.95 5295.00 4S89.95 INT TM Products Infer national 8931 BrookviUe Rd, Silver Spring, M) 20910 Phone (301)587-7824 FAX (301)585-5402 KENWOOD CS-40Z5 CS-I035 CS-5135 CS-5155 CS-5155 CS-5175 CS-S130 CS-5ISO CS-5170 CS-60ZO CS-6Q30 CS-4025 REG. $499.00 SALE $369.95 m DfSCRWtOS Analog Qsct TToicop*i *./o Readout ZO MHz* Dual C^irtnal 40 Uti, Dual Cfrannei 40 Mi, ?-Ch, i-Tr*ce, delayed Sweep 50 Wit 3-Ch* S'TriCfln Delayed Sweep 60 WE, 3-Ch. 6-Tra.ce. delayed Sweep 100 Hfi, 2-Ch. ft-Trice, Delayed Sweep Ajiilog Oscilloscopes. «/■ Ge ado ut/ Cursors 40 W2 t 2-Ch, 4-Traei, Delayed Sweep Analog 40 Pfflz/HO HKi, 2-Cti (Equivalent Sampling, LOO HHz t 2-Cfi t i-Trace* Delated Sweep 150 flKz, 4-CJi, 10-7race, Del a>-ed Sweep 100 MHz,, i-CH. 10- Trace, :ela?frd Sweep, Programmable Front Panel 4 Video trigger 150 MHz, 4-Ch, LO-Trace, Oe-ayect Sweep. Programmable Front Panel I Video Trigger ?(>95,0O Digital 5tonge Oscilloscopes w/ Read out/Cursory 20 mt Real Tfn KMTE 8114. MAGES WITH A GBElf SCALE Cf X IETO-S A«) RDSCLLrriON Of MH*S4iS HXELS. TOTAL SCSEW BESilLmCW AWBOXMJITB.V MOW PKEL3, [TJPLAY8 MA TH5 WDEO MWJT <* VOUft VOfl. I VCWOHVT OF krwiofl. vsn CBW MOOUJTOH (WCWTOB REPLACES TV TH-. LINE Stocking Locations Across America. SHOWN AS AH HTEOflATED 5YHTH* TV, CJAEFtA. not isQjjoerj OUtcRAPHD«. $249,95 EACH I 46CLO0PvP* cALSYsrais ATJDt 1000 aL40AV«LMLE M HTfOWL EE23and FAX Order (213) 827-1852 P.* a Electronics Box 1 1 148 Wi Lr Marina Dol Roy, CA 90292 54BD CIRCLE 267 ON FREE INFORMATION CARD 400 MHz AMPLIFIER/IF MODULE Contains: • 2 ea. SK1306 Transistors • 2 ea 25 KHz 3 Terminal Quartz Filters • 2 ea. Mini Circuit Labs SRA-1 Mixers • 3 ea. RCA CA3028A IC's • 1 ea. PMI OPCH IC's • 6 Erie Ceramic Trimmer Caps • 1 ea, Johnson Precision Trimmer Cap Module removed from satellite navigation receiver. With schematic and data sheet. 5"x5*x1V«' thick. Onfy $19.95 SAT/NAV SYNTHESIZER MODULE Used with above, contains CMOS IC's. trimmer caps, etc Same size as above with schematic and data sheet. $19.95 SPECIAL: Buy both tor $34.95 ADAPTOR 'BNC female to 'N 1 male UG201 AW 2 tor $6.99 f'I'/'/'/'/'I'/W 3 POLE DC MINI MOTOR Vh - 30 Wc draws 40 mA at 3V, 100mA @ 24V, shaft y, ( * long, approximately .030 diameter. Bronze bearings. Size V x «■ x %'■ 10/S8.95 12 VDC, W SOLAR PANEL With cord and plug measures 7* x 13*. New — factory sealed package. $27.49 each STUDIOLINE STEREOTRAC Better than DBX ! Stereo separation >90dB! Includes special receivers tor autotrack signals, authorization codes (FSK format). Microprocessor controlled varactor TV tuner, 107 MHz l.F, circuit, 11.4 MHz l.F. circuit. Includes DUAL compressor/ expander circuitry for both ief! and right channels. Brand New! Comprehensive schematic package included! Two Units, Schematic Pack ONLY $49.95 SOLD FOR EXPEftMEVML USE ONLY ! NOT INTENDED FOR USE ON MY CABLE SERVICES. JERROLD 36-CHANNEL WIRED REMOTE TV TUNER Low and mid- Band TV tuner. Brand new. Model JRX-3 $24.95 each 3 mW He Ne LASER Power supply diagrams included. $29.95 CAPS, DISKS, SILVERS, LYTICS Glass, epcxy, many types. 5 lb. Mix $5.00 RESISTOR RIOT Vi, Vi, 100MHz without frequency division. This device also references a 60MHz cystal oscilla- tor. It is ideal for digital circuit designing. It accepts any standard TTL level input. Additionally, the software is written to accept division factors. This allows you to add a prescaler front end and thus increase the maximum input frequency to well above 1GHz. We have used the AP-90-T prescaler manufactured by Start ek International and found it to work quite well. Many frequency counters offer 2 or 3 timebase settings. Ours provides you with eight. Like the cap meter, this device learns. To com- pletely calibrate all 8 timebases you would perform the following steps: at- tach a frequency to the BNC input, press "C" to initiate calibration, enter the fre- quency used. In 30 seconds the com- puter will finish it's analysis and your counter will have been fully calibrated. PERIOD The third and final device contained within the T1001 is a complete pulse measurement system. The pulse meas- urement system can be set to measure a positive or negative pulse. It has a noise immunity circuit which screens off all but the first pulse recieved. This device also provides a TTL compatible start pulse to the user. This start pulse (handshake) can be used to let the user's circuit know when to send the test pulse. One application which we have used many times, is to use the start pulse to continuously fire a one-shot (monostable multivibrator) circuit. Displayed on the screen and continuously updating is the precise pulse width. Establishing RC timing values has never been easier. The start pulse may be switched to a single pulse which is sent by pressing a key on the keyboard. Like the other two devices, the pulse meaurement system references a 60MHz crystal oscillator. It features a 1 6.6ns resolution and accu- rately measures pulses ranging from 80ns to 71 .3 seconds + or -1 step. order # 1-9 10-49 T1001 *179,95ea. *1 69.95 ea. 54BF T1002 DIGITAL CLOCK SYNTHESIZER 4.29 billion frequencies The T1 002 is a digital clock synthe- sizer which produces a TTL compatible, 50% duty cycle square wave. This device will synthesize 4.29 billion different fre- quencies between 6MHz and .002794 Hz. Units may be displayed in MHz, KHz, Hz, us, ms.s, ormin. It uses a 24 MHz crystal oscillator as a master refer- ence. This unit also features an output impedance compe n sation control which allows you to use regular wire instead of an expensive injection probe. To select a frequency just press "D" and type in the frequency desired. If your frequency is not available, the closest available frequency will be displayed and synthe- sized. Pressing the up or down arrows will increase or decrease the frequency. The T1002 can be used to generate clocks, baud rates, sync pulses, and period calibration waveforms. Frequen- cies generated are based upon the fol- lowing formula. foHz - 24MHz/(2n) where n>1 & n is an integer order # 1-9 10-49 T1002 *1 79.95 ea. *169.95ea. T1 003 8 CHAN. 1 2 BIT A TO D • 8 BIT D TO A • 24 BIT DIG. I/O OVERVIEW The T1 003 consists of three pieces of test equipment all housed in one 10" x 7.5" x 3.1" ABS plastic instrument case. It contains an 8 channel 12 bit analog to digital converter, a single 8 bit digital to analog converter, and 24 con- figurable digital I/O lines. This device will allow you to interface your computer to the real world quickly and easily. TO D First, we have an 8 channel 8 bit analog to digital converter. With the press of a key, the 8 bit converter be- comes a >12 bit converter which offers 1 mV resolution from to 5V, You can use this device to read or monitor 8 different DC circuit voltages simultane- ously. Any of these channels may be activated or deactivated with the press of a key. D TO Next we have an 8 bit digital to ana- log converter which produces to 5V in 20mVsteps. To produce a DC voltage, you would simply press "V" and then enterthe desired voltage. This device is great for linear op-amp projects. 24 BIT DIGITAL I/O Finally, we have a 24 bit digital I/O section which can be set up as three 8 bit ports, or two 8 and two 4 bit ports. Each port may be set up as input or output with the press of a key. This section has an infinite number of uses. Create your own alarm system. You could monitor up to 24 window or door sensors. Generate the 1's and 0's needed for digital gate control. Why build a display for a prototype circuit? Just feed the raw binary into your com- puter and see the count displayed on the screen. Your breadboarded design is much more powerful when you can proc- ess the data with your computer. Large corporations have been doing this for years. The T1003 is easily accessed through a 36 position European style terminal block mounted on the unit face. When using the included software, all of the functions which have just been de- scribed appearon the display simultane- ously. The A/D and D/A values are displayed as DC voltages. Each I/O port displays a decimal value, a binary value, ON or OFF, and INPUT or OUTPUT. order* 1-9 10-49 T1003 «1 89.95 ea. *179.95ea, IT1004 LOGIC IC TESTER / IDENTIFIER The T1004 is an advanced digital logic tester and identifier. This unit is capable of testing a vast number of logic packages including 7400, 4000, custom pals, and more. This package includes a tutorial on how to add components to the existing database. The T1 004 goes beyond simply running a truth table. This unit has the ability to analyze an unknown IC, and if it is within the data- base, identify it. Additionally, it meas- ures the input low to h ig h and hig h to lo w thresholds, as well as the output volt- age levels. From this, the T1 004 often has enough information to assist you in determining the exact logic family of the IC under test. order # T1004 Available 12/91 DB-25-6 6 FOOT INTERFACE CABLE This cable connects the 11 000 to any peripheral unit. If you elect to con- struct your own, it must be fully popu- lated, wired 1:1, and contain 24 awg (or larger) wire. orders 1-9 10-49 DB-25-6 *12.95ea. '10.95 ea DB-RIB-(num) INTERCONNECTS (num) PERIPHERAL UNITS This cable is required in order to use more than one peripheral unit (T1001-T1004) simultaneously. If you elect to contruct your own, it must be made using 28 awg, 25 conductor rib- bon cable and contain (num) DB-25 IDC females and 1 DB-25 IDC male connectors, Connectorsmustbeplaced at 5" intervals. order # 1-9 DB-RIB-2 *15.95ea. DB-RIB-3 *23.95 ea DB-RIB-4 *28.95 ea Make check or M.O. payable to: TSW ELECTRONICS Address: 2756 N. University Drive, Suite 168 Sunrise, FL 33322 z TSW ELECTRONICS CIRCLE 272 ON FREE INFORMATION CARD Add $5.00 S&H for ea. T1001-T1003 , Add $2.00 S&H for ea. 11000, or cable o Florida Residents add 6% sales tax < Allow 4-6 weeks for delivery 5 For technical info call (305) 748-3387 § All prices are in U.S. Dollars 3 Prices and u n i i avai lability subject r± to chan g e wi rhout notice SJj 54BG NEOPRENE WEATHER BALLOON inflates to 8 ft. diameter; 1000 gram net lift, 5.5"L x 1.5" dia. inflation nozzle, 3.5" dia. neck. October 1971 dated; 3 lbs. #BAL-75GH Unused $16.95. ..2 for $30 1 00 GRAM 3 ft. BLACK BALLOON;5/75 date. #BAL-100G $1 .50 ea; 10 for $10 SOUND PROTECTOR / V Avoid hearing damage from loud machine Bjl &■ noise, firearms, explosions, 4"H x 3"W x 3"D ^A ; £f foam- lined plastic cups with padded cush- ^^ ions and headband, Made for military; 3#. ASTROCOM #10232 Unused $16.95 ^^^^ GROUNDED 6-OUTLET AC STRIP with lighted ON- \ OFF, RESET, and long 15' cord, 13x1.8x2.5, 3 lbs. #ST-6AC, Used $5.95 ... 2/$10 Unused $9.95 ENERGY STORAGE CAPACITOR 88 MFD 1Z0D VDC, non-PC B for high voltage projects; 1 0'Hx4.5'x3.8 1 , 9 lbs. sh wt. #LPC-271, Used ... $12.50 TORROIDAL TRANSFORMER with two 20 V 5 AMP secondaries; 1 1 5 VAC 60 Hz primary. Nice specs for audio amps, etc.! No hardware; 4.5" dia. x 1.6"H,4 lbs. #4365-P1S2 , $11.95 MATCHED DC METER SET, consisting of 0-30 VDC and 0-30 amp DC 2.5" rjia sealed meters with 50 MV shunt; 3 lbs. #M3u u -30A, used ... $19.95 Prices F.O.B. Lima, O,* ViSA, MASTERCARD Accepted. Allow for Shipping • Write for latest Catalog Address Dept. ES • Phone 419/227-6573 FAIR RADIO SALES 1016 E.EUREKA • Box 1105 • LIMA, OHIO • 45802 TECHNICAL SCHOOL CLOSED! Sell! tig hundreds of H Eath Co. test and (rainingequlpm«m at upto 7G% offiliali' eatatog price*. Use Heath catalog for description. Condition: new to slightly used, many without manuals. All professionally wired S tested, or In kit form If noted. First come, first served. Check or major credit cards. Sorry, no COD or open accounts. Add 14.50 Mailing & Handling, any quantity. HEATH TEST EOWPUm IMS217 BatoryC^aadV.O.M., Wired ITW2250 AirtoRa^&radtar Malar, Wired IT22SOK AlttRwgtCipKffixMrttrKlt ITW3120 SeroaxiAjaMChejrjwi. Wired PKW105 DeluwlOilCoiTSo Prose, Wired SPECIAL 10 @7.S5, 25® SK101 12VDC-3APm« Supply SIStHM 3.5D^,l DMU,An»nbl«i,».c aie SM2206 Crami>On Ammeter SM2420 Dsltjx* Unwraal Counter 2717A Pjj.H.V.Pmhi Supply 271S Tri-Pjg.Po»«Suppy *22&;«iu al't Dual Trace 25 MHi OecilQKOpt. 27.50 S!.K 46.50 43 50 S« 6.50 M.50 37.50 36.50 1*5.00 lt5.DC 159.50 355,00 Z" Project Speaker E*penmenier's DeluhL g ohm , . \ Wall J"Spk 3(oiI.OO 1Jlor5.« HEATH SWCATIONI} KYfJTFItl ET1O0 McrocompuEer Trainer EWD100 Dual 5-5- Disk Dms (tor Abo™) ZVM133 Terminal lor ET1 00 Above ET1O05ET H3taoi&Ht 6WMO W0 H ale I W arfeMe Oi nk SOLD ETSOt 350 Holt Breadboard BkA ET250 1 70 Hold Breadboard Bo* ETB3300 Bread Board Eiperrmerll Morkie ETA3MO Fjtln GSO hoie Breadboard Bock ETB6201 ESg.Exprim«l\CrculBfdMaiii« EEA31MA EtoroniiCto Guide* 2 Audio Tapei HCA300C RF Connector Adaptor Kit MSCEUAtteOJS DSMS4 0XAulSjWi»R»c*v<>r IF.950-U5QMHI HP-1 SC H-P SotntBc CeJeulalor 1 360 pa. Book HS232-VJ* Dutnaim NW Breakout Box. RS232 2-Hne 1-018 LED Tes1 Sat U93 Ctj-DarjiMrcrolinaPnnler 700-T T-l Sikwl 700 Data Terminal wrAcousl DB2S2S-2V R S232 AB Sw. Box. MrKaJ CN3 625-2V Ce ntror. c AB Sw. Box, Maul B1D60 500 •wis.LugAsjt.AWGI 2-22 wfcat HT301 Oe\i» Ratchsi Ck>s« Lug Cfmp Tool 54SA H-PLogieClip 395.00 S5.00 149.00 595.00 OrSt 2S5 195 24.50 7.95 43.50 15.50 55.00 SB5.0O 49.SO 29.50 95.00 54.50 14.50 15.50 12.60 11.50 99.00 Stainless Pliers Set Designee! for precision rJecrjOrwc work, S Li n!e ss. ru5:eroo J . wash able a/>d erwn contaminate. Furfliwmora. (hey're run-' majific. Feature*: box jomi. pred ion ground cuttng edge and plastic nnps. Fib palm. Lirrwted quantity aviiabT*. > H104A 5-IWOtfMtNoedlenose H104B 4-1/4" Diagonal Cutler H104D 5" Long NeeClenose H 1 (ME 4-3/4- Snort Necdtenose One Set 0141 2.85, 4.85 4.85 4.85 485 to sate ea. 9.95 SV Alkaline Battery Each 1. 85 10 (on .65 9V Battery Snap Clip GBitMEKESnRM RESIN COM SOWER 5ft t K642SM K6493M KS431M KSS32S7 KS46«.54> KS64BAR-1lb Let .025 .025 .093 All J02 Dual Banana Adaptors 2710 BNC Fomalrj lo Banara 2720 BNC Mai* to Binding Port! 2730 BMC Fnmala to Poala 3.95ea. 10<3>3.45ea. wfjTHitaawwseottBSFfi NotoiThaamallkiuol opmpooanl: parti muitr avppaad wrtn mamialsartnolavailabli and prim refect tmomissjon. AJ countaart naw. andvrithKXram, EE4S4 O tur a m nl A wpMiia BOLD WS& E6W2 A awaRllna S anaa SOLD -7 ~3 EEIOS OptoEkKtrnniclCauM 24 50 E6WM Paaawa C n u l D aa^n C otnw SOtD 2»M EE3140 Corwpt! of Etaamira, 2 Vol, 36.50 EE3201A BgitalTacrrri^taCoiJrsi^wl.SPEC. 36.50 EE4201 FibwOptksLtamingCourw, SPECIAL 19.50 EE5201 Lib Eisorimwt! Digital T*di wGudt 1 3.50 OI70» TTL'CrnlOC Ci'fxilQ SOLD 3&W Easy CoijMPiogriTvrrinjH-PHCilSC 250 pj. 9.50 EOKATIOHAl BOOKS Thtf la oMki ara brand ntw £ raprasanta saving war pubish art bat prioaa. All hard bound axcapt{aofr) aa notad. Were CornpuKt Estptrimantafsn wrtnaaj SDK-65 TTL Cook Boo*. LanouHr (»h), Sams Atsambly Languag* Program (soft), (ntaf LVisbn Makmg LHsarUnoartainty. Hull. P-HaJI In -CffCul Tasting, J. F3altaon Indusaial VantJarion , 1 9th Edraon , Anvrican Conl. BOOKS BrUCSHAWHlU Sotwara RaliatxMy , Mu aa lamino ktrrodocing Tha Unix SyJUrrr, McGilton 4 Kforgan B jftal Elodronka , Tottiaim t Activitas Man.. 2 Vol. A Refrwc* Guide to PracKal Badronics {tort) Sa-aJagiag lor Bacirorac TtsL P^rvi go mmm mM Etectronic Devicas. Royd. 2nd Ed. Experiments In FJectronrj Dev., Accompanies above DirjitaJ Expanments- Trouble shool, Cox (son) Expenmanli in Electric Crcuils, Stanley, 2nd Priraples of Electrorac C'rcmts, Royd, 2nd Ed. Principle! of Electrcnc Circuits. Boyd, 3rd Ed. 7 53 f-K fS5 8 95 ',;.K 14,* 3.50 2.ES 5 35 335 4 3.5 13 a 850 S.35 3.50 3 95 12 55 Quick Guard Motion Alarm eiraare amchmeni to ai computer etc by magnets Erryls 80tfa pulsed ararm signal i rawrtadl Smflla arra 1 desm ws^iraf key. 10 hc .amy 1 ■»( May . Alio r»SM aftaf i> aec, ciatann. SV beJery cpe ra tcn. STO SPEaALIJiiae. 1D«>1DJ0 tcom Tech MCTQytM CABLc^tJ[iyWWL4TH>4rOtJ£g Ct.tJLt.llO OEubOCand MaktiMrJe tOFl SOLDe-96 CW15MM13 D-Sub « ConrJ.. MdesMaiit. lOFl. 6.95 CW15MM15 0-Sub15Cond..MalerMale, 15FL 6.95 SPECIALBvy10®5.95, 25rjn.S5 ASK FOB BtTTTEH PRICE OHAYMLA SLEOUAHmiES 1 755 Osgood St . N Anriover, MA 01845 CALL 506/482-6936 FAX: 508/689-9484 ORDER TOLL FREE. 800/343-1455 RE4 CO O Z o LX UJ 6 D 2 MICE & MODEMS EXTERNAL MODEMS & FAX CARDS $69.00 2400 BPS Modem $89.00 $81.00 2400 ModeBi/4800 Send Fax $94.90 $8S.00 2400 Modem/9600 Send Fax $99.99 $111.95 2400 Modern V.42 bis MNP5 $151.00 $110.91 ALL MODEMS ARE HAYES COMPATIBLE $132.40 MNP 2-7 & COMMS SOFTWARE INCLUDED FREE PRODIGY TRIAL ! 5 YEAR WARRANTY INTERNAL MODEMS & FAX CARDS 2400 BPS Modem 2400 Modem/4800 Send Fax 2400 Modeni/9600 Send Fax 2400 Modem V.42 bis MNl'5 9600 Send Receive Fax 2400 Modem/9600 Send Receive Fax MICEANDTRACrUlALUS NAKAl: Serial Mouse, 2 button, optional graphics software ($5.00) $16.00 Z-NIX SUPERMOUSE II & MICROSOFT WINDOWS v.3. Serial Mouse with software $75.00 GENIUS F302: Serial Mouse, Pad & Pockcl, Graphics & Menu software, 1050 dpi $42.00 GENIUS F303: PS/2 Mouse, Pad & Pocket, Graphics & Menu software, 1050 dpi $46.00 LYNX Trackball: Serial , 2 button, mouse alternative - takes up less desk space $39.00 MOUSE PADS: Help your mouse run smoothly, high quality, red or grey $2.90 SCANNERS AND OCR LOGITECH SCANMAN: 400 dpi, 4" width, Paintshow Plus software, for all DTP packages $79,00 CAT READER OCR: Logitech Scanman & CAT Reader combo $99.00 MATRIX NORTH (USA) 4154 NORSE WAY LONG BEACII, CA 90808 TEL: (800) 800 MICE FAX: (213)429 6369 54BH !?•" ELECTRONICS LESKO'S ELECTRONICS COMPUTER PARTS AT Multi-IO Card 2S.P.G $ 19,95 AT Multi 10 Card 2S,P,G,IDE HD/FD Cont 34.95 XT Multi-IO Card S,P,G,Clk.,FDC 360,720,1.2,1.44 36.95 IDE HD/FD Controller 24.95 WD-1003V-SR2 AT RLL HD/FD Controller 49.95 WD-1003-RA2 AT-RLL HD/FD Controller 49.95 XT Super Floppy Controller 360.720,1 .2,1. 44M 24.95 XT RLL Hard Drive Controller 56.95 XT MFM Hard Drive Controller 50.95 65 MEG Hard Drive 3 1/2" RLL w/" mounting kit 239.00 40 MEG AT-IDE Hard Drive KALOK 340 (reman.) 180.00 32 MEG Hard Drive KALOK 330 RLL (reman) 125.00 84 Key XT Keyboard 22.95 Focus 1002, 101 Key keyboard AT/XT w/hardcover 54.95 Super VGA Card w/1 MEG, w/Sottware Drivers 149.95 20 MEG XT-IDE Hard Drive w/Controller Board 125.00 Speedlink 2400 Baud Modem w/software 64.95 Genius CLIX Mouse, 3 Button, 200-1200 DPI 26.95 Joystick, Serf Centering w/Fire Button 15.95 Surge Protector 6 Outlet 7.95 Surge Protector 6 Outlet w/Modem Protection 21 .95 6 ' Printer Cable 5.95 10' Printer Cable 8.95 6 ' Monitor Extension Cable 9 Pin 4.95 6 " Keyboard Extension Cable 5.49 Monitor Power Cable Adapter 4.50 Replacement Keyboard Cable With Connector 3 50 360K Floppy Drive 64 95 720K Floppy Drive 3 1/2" 64.95 1 .2Meg Floppy Drive 5 1/2" 64 95 1 .44 MEG Floppy Drive 3 1/2" 64.95 EPR0MS 2716 Eprom (pe) (1.25 2764 Eprom (pe) 1.90 27128 Eprom (pe) 2.75 27256 Eprom (pe 3.25 27512 Eprom (pe) 5.00 MEMORY 4164-15 (p) .50 41256-120 (p) TMS4464-150 (p) 1.25 2.00 TMS4464-120 (p) 2.25 44255-80 5.95 1 MEG x 1-100 5.25 1 MEG x 1-80 5.50 1 MEG x 9-8 SIPPS 56.00 1 MEG x 9-8 SIMMS 58.00 (p) Pulled (pe) Pulled Erased L0RAN ANTENNA MOUNT This ts a toran antenna mount with builtin amplifier used to receive the loran navigational signals used on ships and boats to locate their positions. The mount rasa built in amp and is to* freq. usable in the 40- 400 khz range. Comes wifli approx 35' cable. A STEAL AT ONLY I $15.95 100# MEMORY PHONE DIALER + This single line Telephone System has 100 number memory with up to 40 digits in length. Automatic and manual delays may be stored. Last number rediat and hold feature.LOCK OUT 900 NUMBERS. Lock out long distance numbers. All Touch Tone phones on line can use dialer. PLUS MORE FEATURES.SUPER PRICE ! WOW! ONLY! 15.95 MITSUMI UHF TUNER These are standard urrf tuners with a 70mhz outputThese are used In many TV and VCR's Mitsumi p/n UES-A55F w/schern. SUPER PRICE AT ONLY 1 $ 5.00 PROGRAMMERS SUNSHINE EW-904 Eprom Programmer 4 Gang program 271S-27512 Eprom a w/software EPROM ERASER Does 25 pes. w/limer $ 129.95 119.95 MISC. PARTS SAWFJterCTI-BOl34 70mta $ 1.95 24 Pin Gold Sockets .65 28 Pin Gold Sockets .75 Other IC Sockets in stock CA1L LORAN AMPUFIER 8.95 DC to DC Converter (isolated) 10.95 22 Volt DC Power Supply 9-95 24 VAC Wall Transformer 250mw 2.00 UtTSUMl RF Modulaior w/pmout 5.00 Bridge Dwde 600V 1.5 Amp JO Bridge Diode 600V 2.5 Amp .45 Vertical Linear Pot 47K 200pcs. tor only 5.00 70 Ohm Coax .125 od, AWG 27/7 braided shield. 501 Minimum peril .08 SATELLITE /CABLE CAL-AMP Cim FEEDHORN $ 139.95 45Deg,C-BandLNB 109,95 1 .8 KU LNB LIMITED QUANTITY! 44.95 4 WAY Spitter DC Passive 950-1450 5.00 2 WAY Spitier 3.00 AB SWITCH F-Connector 2.50 TRACKER ll & III Remote Upgrade 15.00 Replacement Feedhom Motor 1 5.95 20dbUNEAMP 11.95 STS Horizontal/Vertical Switch 8.50 RepSacememiOTumPot 10.00 10 db ATTENUATOR 9.95 N CONNECTOR F-F 3.95 N CONNECTOR 90 deg, 3.95 MITSUMI RF MODULATOR Crystal corrtroted "RCA" phono style output. connector. Used by Blrdvlew tor their satellite receivers. Super for all projects !! w/pinouls ONLY! $ 5.00 AMIGA CD-ROM SOFTWARE The Fred Fish Collection on CD ROM Disk contains the entire 480 floppy disks of the Fred Fish Ibrary. Over 630 Megs of data and over 49,500 separate files. The disk contains a second copy using LHARC program for BBS sysops that wish to post the collection online. This is a unique feature of this disk. The collection is in its original form, organized by disk, which makes ii possible to easily locate any program or file on 1 he disk. The disk is a product of HyperMedia Concepts Inc. The price of the disk is ONLY! $69.95 We also have software drivers for CD ROM to SCSI interface for the AMIGA. CALL! PONT SEE WHAT YOU NEED ? COMPUTER, ELECTRONIC COMPONENTS ? CALL 11! Send Orders To: Lesko's 66 14-7th Street Kenosha, Wl. 53144 Phone Orders: (41 4) 553-9440 Fax Orders:(414) 859-2928 Hours: Mon-Fri 9-5 Central Time Closed Sat-Sun Minimum orders: $10.00. Minimum shipping & handling $5.00. MC, VISA, M.O. and CO D's .Wisconsin Residents add 5 1/2% sales tax. Not responsible for typographical errors. All merchandise subject to prbr sale. 20% restocking fee on all returned orders. Return orders require R/A Number.Sorry No Personal Checks. WE BUY SURPLUS & OVERSTOCK ELECTRONICS Send us a fax with discription/price and quantity. 9 m CO m n (O (O CIRCLE 225 ON FREE INFORMATION CARD 54BI o -I LU 6 a LEARN / to Clean/ Maintain/ Repair CAMCORDERS HUGE EXPANDING MARKET! Work from your home - part-time or full-time! No prior experience needed - Average mechanical ability only requirement for your success! Over 75 million camcorders in use - Over 5 million expected to be sold in 1991 alone! It is a fact that the vast majority of camcorder malfunctions (just like VCRs!) are due to simple me- chanical failure... We can show you how to easily fix those breakdowns and earn an average of $85.00/Hr. while working at home! Get In Now - Soon camcorders will be like VCRs, i.e., one in almost every home. For a camcorder cleaning job you can earn $65.00 for less than 30 minutes work. For a camcorder repair job you can earn over $ 1 00.00. Free information package call or write: Toil-Free 1-800-537-0589 Viejo Publications, Inc. 5329 Fountain Ave., Dept. RESC Los Angeles, CA 90029 CIRCLE 263 ON FREE INFORMATION CARD LogicLab™ Explorer The Soft Logic Bench An affordable logic simulator for students/hobbyists • Easy-to-use graphical user Interface • Point-and-click wire wrap operations • Thorough users manual — easy-to-follow tutorial LogicLab™ gives you the equivalent of: • A parts cabinet stocked with more than thirty types of common 74LS series ICs • A 16-channeI, 1 -nanosecond logic analyzer » A wire wrap board that holds up to forty ICs • LED and seven-segment indicators • Pushbutton switches • Signal sources ^ Kll v/ $^Q95 and much more ONLY Send check or money order to: K.E. Ayers & Associates 7825 Larchwood St. Dublin, OH 43017 30 day money-back guarantee Requires IBM-PC/XT or AT (or compatible). 51 2K, DOS 3.2 (or higher), EGA or VGA display, and a mouse. CIRCLE 269 ON FREE INFORMATION CARO MS-DOS EPROM PROGRAMMING SYSTEM NEEDS NO INTERNAL CARD F.PXOMS cM,2I.Ui>d*'pJi»i 2708,2758, TMS2716*,2716 27C16, 251 6, 2532*, 2564* 68764*. 6*766*, 2732, 2732A 27C32, 2764, 2764A, 27C64 27128, 27I28A, 27C128 27256, 27C2S6, 27512 27C512, 27S13* 27011*, 27C011* (1 MEG) 27010, 27C010 27C1000. 27C1001 27C020,27C2O01 (2 MEG) 27C04O.27C4O01 (4 MEG) EEPBQMS 2K04.2S16A,28C16 2817A*,2864A,28C64 28256, 28C256.52B13* 52B33* MknCaatadSca S741A*, 8742*. 8748(H)* 8749(H)* 8751*, 87C51* 8752* 8753*. 8744* 68705 *, TM57742* •ADAPTER REQUIRED Digrams included Willi manual Assembled adnpteTa arc ayatiablr ccwircrs PARALLEL TO YOUk SYSTEM'S PRINTER PORT .\ FAST. EASY-TO-CSE Vi STEM HOKKs Willi l\V DESKTOP OR LAPTOP MACHINE .EXPANDABLE, FLEXABI.E DESIGN St WORTS CI RRENT AND FL'TIRE DEVICES SVPPORTS 8, In * 32 BIT DATA FORllATS INCLUDING WORD SPLIT & DOL'BLF. WORD ■READS AND CONVERTS INTEL HEX MOTOROLA S-RECORD AND BINARY STIES 'HARDWARE PROTECTED AGAINST DEFECTIVE AND INCORRECTLY INSERTED DEVICES .NO SOFTWARE INSTALLATION NECESSARY PR1X.HAM TOTA11.Y SEIK CONFIGURING SYSTEM SOFTWARE COMMANDS .PROGRAM EPROM(S) F-RO.MDLSK1T1E .READ DISK FTLE INTO BCFFER .READ EPROMIS) INTO BITTER -SAVE EPROM(S) OR BITTER TO DLSK .PROGRAM EPROMlS] EROM Bl FEER COMPARE EPROMtS) WITH BUFFER •COPY' EPROM(S) .VMB1 EPROM ERASES •SELECT BCTTER EDITOR .SELECT DEVICE TYPE •DEVICE CHECKSUM ■SETRVFTER (», 1.1.3) PLUS AN INTEGRA TF .O Bffh'KK EDITOR WITH 78 B YTE LEVEL COMMANDS S289 SYSTEM IN GLIDE'S! PROGRAMMING L'MT, POWER PACE CONNECTING CABLE, OPERATION MANUAL & SOFTWARE. CAU. ABOUT OPTIONAL .ADAPIIXS- TO ORDER SEND CHECK, MONEY ORDER, WRITE OR CALl ANBRATECH VISA P.O.BOX222 MTLFORD, OHIO 45150 (513)831-9708 FAX 1513)831-75*2 MASTER CARD U)D 44J* JOll T.O.D. vDD V?.0* FOR SHtmNC IWaiTE FOR MORE INFORMATION OR CAUL AND LISTEN TO OUR "TALKING" PATA SflEET 54BJ FREE CATALOG! call toll frees 1-800-356-7714 9:00 a.m. to 5.-00 p.m. Pacific Time Minimum Ofder $20.00 Please note that each laser tube and head sold by MWK Industries is time-tested and measured lor true optical power output before shipping. Al tubes and heads we set will put out tie specified power at the nominal current setting. When purchasing a laser diode assembly, please note that visible laser diodes operate at 670 nM (nanometers), while Helium-Neon lasers produce light at 632.8 nM. The human eye will percetve the HeNe laser as being about seven times brighter than the equivalent laser diode even though the true power output is the same. Thus a 5 mW (milliwatt) laser diode will only appear as bright as a 7 mW HeNe. 2 mW SIEMENS LASER-TUBE Great tor light shows, holography, communications. The units are surplus, have been used but work wed. Now only (25.00 OPTICS KITS Learn Basic Optic Theory with this Hit Kit includes 3 Lenses, Fresnel Lens, 2 Polarizers, Flexible Minor, Hologram Diffraction Grating, Optical Fiber. Only $20.00 Sltmtm I mtr-Tab* 1.5 mW Ht-Na HEAD (Phillips) Brand new, polarized with a very small beam divergence, designed with mating connector for the following power supply. 10" by 1 1/3" Not pictured. $35.00 Qq#t QtcvH Batfii "OPEN-CIRCUIT-BQARD" LASER POWER SUPPLY Brand new, is ideal for the budding laser enthusiast on a tight budget! This supply was originally destined for use in video-disc players, but is now available tor your use on any He-Ne tube up to 4 mW. They measure 4" by 12" by 2" with an external transformer, and are now selling for only $35.00 Esc hi Bar Coda Scannar COMPLETE WORKING SUPERMARKET BAR-CODE SCANNER Puil one apart and get a 2-3 mW working laser tube, laser power-supply, polygon-mirror motor, several front surface mirrors and much, much morel A bonanza of parts for the electronics experimenter. Our Low- Low Price $75.00 (plus shipping and handling charges; MWK Industries 1269 W. Pomona Road #110 Corona, California 91 720 LASERS LASERS? What can I do with them you asKBuy our plans or books on laser technology and get started} LASER Plans Mem 62A: LASER perimeter security alarm based on HE-NE, Whooping or silent alarm. Reflects beam off mirrors. Selectable alarm duration. 7 pages. $5.00 Item 63A: LASER modulation and de-modulation using HE-NE. Transmit voice or data over free space. Uses commonly available components. 6 pages. SUM Item 64 A: LASER experiments plan. Demonstrate coherence, colli maSon, divergence, focusing, light show effects, rifle alignment, pipe laying, trench cutting, optical alignment of sophisticated LASER systems, light sculpture. 9 pages. $5.00 BOOKS Item 53 B: The User Cookbook by Gordon Mc Comb A collection of sa working projects for the laser experimenter. The projects include everything from power supplies to holography and include excellent illustrations throughout Definitely an experimenters dream-come- true! Great reading. 406 pp. $20.00 flam 53 A: Holography Handbook, by Unlerseher, Hanson and Sc hie sing or Making Holograms the Easy Way. Probably the best text on a "hands-on" approach to holography. This is a step- by-step tutorial designed for anybody who is interested In generating 3-dimenstonal images using a laser. Hologra- phy is one of the most fascinating art-forms ever and new ideas in this field are being come up with every day by holographys at every level of expertise. Fascinating information on each and every page I Hologram Included. 408 pp. $18.00 Item 54C: Lasers, Tool of the 80'a How beams of light are changing our lives from surgery and communications to art and the military. 272 pp. $15.00 HIGH POWER HELIUM NEON TUBES 1=> MORE MILLIWATTS PER DOLLAR! 8-9mW 9-10mW 10-11mW 11-12mW 12-13mW Laser Tubes below are brand new: $125.00 $150.00 $175.00 $200.00 $225.00 13-14mW 14-15mW 16-17mW 20-30mW $250.00 $275.00 $300.00 $750.00 Item 21AN18: Brand New Plasmatronlca H»-N* Supply 1 10 VAC input. 1 1/4" x 3 1/4" x 3 1/4". "Potted" supply with "Akten" HV connector. In our opinion, the best He-Ne laser power supply currently manu- factured. These are direct from the manufacturer and will power 90% of all He- Ne lasers up to 1 8 mW. Our Price $95.00 SATISFACTION GUARANTEED Pmamalwnia Ha-Na Supplf .5mW LASER-TUBE These tubes were made by a major laser manufacturer and are only 4" long and 1" in diameter! They make great pointers, small light-shows, weapon-sights, or can be used for education or experimental applications. Now only $20.00 Each It lor any reason you're unsatisfwd roturn the IhSOr within 1 5 days for a rotund or crutdt Phone t -800-356-771 4 Phone 714-278-0563 Fax # 714-278-4887 $20 00 Minimum Order Educational & Corporate PO's Welcome WE ACCEPT VISA MASTERCARD .SmWltatr Tuba MINI HE-NE POWER SUPPLY For .5mW lubes. 12-16 VDC Input 3" by V NEW, Designed for the above laser. $39.00 ALL LASER PARTS ARE SOLD A3 COMPONENTS ONLY WABNWQrDO NOT BUY THESE PRODUCTS IF YOU 00 NOT KNOW THE DANGERS OF LASER ENEFtGY. WE TAKE NO RESPONSIBLITY FOR YOUR ACTONSII WHEN ASSEMBLED THIS LASER MUST NCORPORATE THE SAFETY REQUIREMENTS OF THE CENTER FOR DEVICES AND RADIOLOGICAL HEALTH OF THE FOOD AND DRUG ADM NISTRATION. m CD m 33 CIRCLE 228 ON FREE INFORMATION CARD STRANGE aw* Electrical Books! Low Cost! Old Radio! Discover one of most incredible collections of electricity and electronics books to come along in years. Youll find scores of nigh quality new books and reprints of rare old books on building and collecting old-time ra- dios Including spark- gap transmitters, crys- tal sets, regenerative and other antique receivers, early telephony and televi- sion, ana morel Big Catalog! Write for your copy of Lindsay's new Electrical Books catalog and see for your- self what you've been missin ' Send $1.00 r & Canada) or $4.00 foreign air- mail. Well send your catalog Im- mediately! Write today) Coils! Build Tesla coils. Induction coils. Wlmshurst and other lightning bolt generators! Re- wind and repair motors! De- sign and build electrical generators! Get high power from auto al- ternators! You'll find quality books on these topics and much more! You'll find plans and info on all types l of unusual equip- ment from lasers to century-old induction coils! Build equipment your friends haven't even heard of! Lindsay's Electrical Books | PO Box 12-WA9, Bradley IL 60916 Enclosed Is »1.00. Send me a copy of Undfiay*a Electrical Books, catalog via nrat class malit I Name | A<[-:lr«s -St- -Zlp- £*E;H®:iPis P-C-B ARTWORK MADE EASY I Create and Revise PCB's in a Flash HERC, CGA, EGA, VGA, SUPER-VGA HELP SCREENS EXTREMELY USER FRIENDLY AUTO GROUND PLANES DOT- MATRIX, LASER and PLOTTER ART GERBERand EXCELLON OUTPUT CREATE YOUR OWN FILMS with 1XART LIBRARIES DOWNLOAD DEMOS from 24 hr. BBS! REQUIREMENTS: IBM PC or Compatible, 384 K RAM DOS 3,0 or later. IBM compatible printers, HP Laser PCBoardS - layout program 99.00 (PCBoards HP or HI PEN PLOTTER DRIVER 49.00) PCRoute - auto-router 99.00 SuperCAD - schematic pgm. 99.00 DemoPkg. - (includes all 3 programs) 10.00 Call or write for more information PCBoards 2110 14th Ave. South, Birmingham, AL 35205 1 -8CXM73-PCBS/ (205)933-1 1 22 BBS/ FAX (205)933-2964 CIRCLE 279 ON FREE INFORMATION CARD I o UJ oi 6 MC300 POWERFUL MM. "II CAW'. ITAfJCE METER whal your mull! functioned Multimeter CANT do Die MC30G will do. YtMjr niUtL-taellanMI mutlmalw WtuiBfflPf types of T\\ 7|\ bipolai tansstm & ~^p^} f p n p\ Mr /safe i** (te ^.^ ^^ MC3Q0, ten usejwr LtbkJ t-LMJ mdtmtac for HFE, MC400 EVEN MORE POWERFUL COMPOMErHT ANALYSER CAPACITANCE METER Besides appearance what do the blowing tmipoMflts have in common? ANSWER. istatFurtQli Thsy'r* 41 compiet** drJlarant cornponerts Some have omanc part nuruMrs (hava yexr catalog ready to idantny wruort 11 when) OTftra hav* OEM r>jrnb«rs (bet you donl have mat catalog) write stiM ottws riarve no mantingai ft ADOmOtf to to inarvMty by* *rt? rar»jr*j cqrtMy ffllpFBf FARAD rife' _ r*tmy m 1 pr- wrtcrt yeur nwatnup r emi doj r» MCXG atto oo*t the fcfemrg ' HM [MKYC IDHflAcn ■ 1 imp 3 iiitna rou^rg t |h WETR0N a Div of Begem Tetfirotoges Ire 7270 Tertian FK uri 22 Msssaiga 0,1 Carta L4I 1X2 DEALER ENQUIRIES INVTTE0 PI£ASE5BI>5e" " "ulRWi _ MC3CC Qtifl9.9S _ MCTO OJ249.95 _ CASE 8$ 24.96 „_ PAIR OF 36" LONG 1ST LEADS 0(1235- TW HC4X CAN ALSO OO ' all tha fL^cton* ot tha MC300 ■ iflontT-j* tyn» ot COTtfsanonl . FCTV BIPOlAAft. SC*** TRIAC*. UjT*. PIfTh ■ da^t'tin* ooarit/ ot Compor«nl -NPN. PNP. P o* M cn«n"»j. o^rmncamant o- ' co^.I'lai o"c_t at comeo"o r J 4 myra J abH ^ Ihx mcht, nits of 'Vws I ^^21?T^?S21 *C*«W SSf^S eU&*<* • «« 3 r«™c le* eewi , E5 JS?^!! 1 * 2H? lTlX ^ tattBrycGrdfciri * J«nor dodes to 23 V arid rectrlftrs ' B* or* tee • * U dip OVrdi LCD Oflf, to ttmptf and tee protected irpot peered t^ 9 wA betery or cpferiBi AC atoptor [Beanrnsnded fw MC4D01, 'mpaa rejaant ptaefe caas MM20M ras 2 »tj orgs Al uris hew sendtid ps» rf Ka leeds MM3XH (B2S9.S6 C^e a S34.9S M.i«0QA OS46S 95 (tsawHcp voson) EZ rCOK TBT 1£AT£ 0899S _nao6caofltnj6D miSAIOft TET IBDS K3996 ACaateltilAlffl«1055 WWCWHUIOKitrBM m»ijn&» in*. twtf M> (J «a«si WBB_ QUE !dta z Ml ■: fcfiid :-j-\:t flu curt lUCADUHTI/U] r-ABT\ Order Your FREE 48 page Skyvision Catalog Today It's Loaded With Factory Fresh Satellite TV Products, "All At Discount Prices" Call Toll Free 800-334-6455 International call 1-218-739-5231 Fax line 218-739-4879 ~\^t0t ■ Complete Systems • Upgrades • 2ft to 24ft Dishes Satellite TV Anywhere • Parts • Accessories - Major Brands Factory Fresh USA Warranty Fast Delivery Ku Band System ^h WORLD SATELLITE TV AND SCRAMBLING METHODS "The Technicians' Handbook" This thorough text is a must-buy for technicians, satellite professionals and curious do-it-yourselfers. The design, operation and repair of satellite anten- nas, feeds, LNBs. receivers and modulators are ex- examined in detail. An in-depth study of scrambling methods and broadcast formats including the VideoCipher II, OaX Orion. Rim Net. Sky Channel, EuroCypher, D2 MAC. BSB and Teleclub Payview III. Circuit and block diagrams of all components are presented and clearly examined throughout the handbook. This information is a prelude to the chapters on troubleshooting and setting up a test bench. This expert guidance on testing, servicing and tuning is complimented by a wealth of detailed illustrations. 340 pagis, 8 i.-i i 10 i-.» ov«r 200 photos, diagrams, wiring schematics and 16 tables /ipptndicM I ind»x S&H$5(U.S) $39.95 THE SKYVISION DO-IT-YOURSELF INSTALLATION VIDEO "Wow You Can Watch It Being Done" Installing or "Tuning up" your satellite system made simple. VHS or Beta.. ..S&H $3 (US) $33.95 ORB1TRON Mesh Dishes "Quality Demonstrated by Performance" dish & polar tracking mount Z*® "IB" 24" 24" 51" ^ Superj ack II Superj ack XL ball Venture acme JGS acme ACTUATORS S&H $14 15 15 22 $239 299 349 439 $B9 139 129 219 TUNE YOUR DISH TO ITS MAXIMUM! "With The Pico" Signal Meter A must for the serious dealer or satellite system owner. Saves time, frustration and money. Use when installing a new system, moving your dish, re-alignment of a dish that has been moved by wind, frost heaves etc.. gets you right on the satellite belt for the best possible pictures) Pico signal meter S&H $6 $89,95 Includes: 3* solid alumlmun dish with nng mount A quad feed support, slide jack, Uniden 2200 receiver, 1 .3 dS LN8 & feed CBand System lnclude»:7' mesh dish with polar mount & quad feed support, slide jack. EchoStar 3000 IRQ 40' LNB & feed. (VCII+ module optional) LNBs/LNAs LOW TEMP "Hemt Technology" "Commercial Grade" IRD* / RECEIVERS I SYSTEMS "Save $$$ on Packages" System package Includes: OR8ITRON 7 loot mesh dish. 40 degree LNB, 18" Motor Arm, Feed- horn and Raceiver/IRD. VC 11+ decoder module, plus a FREE detailed installation Video. 45' LNB C-band 4GHz S&H $6 40" LNB 30° LNB <30"> LNB &S'~29°) 1.3db,LNBKu 12GHz S&H $6 1 ,2dbLNB " 1.1dbLNB " i.odbLNB " 0.9dbLNB " O.BdbLNB " 50° LNA .(70MHz & block) S&H $6 45" LNA 40° LNA 35" LNA 30" LNA $99 109 149 199 $109 119 129 139 199 249 $129 139 149 159 179 UNIDEN UST22Q0 UNIDEN UST9000 UNIDEN UST9900 UNIDEN UST4200 UNIDEN UST4400 HTSV (IRD) HTS VIII Plus (IRD) HTS X (IRD) MONTEREY 90 (IRD) MONT.100C(Commer.)(IRD) WD/Receiver System (Receiver) $219 (Receiver) (IRD) (slave fecv.) (IRD) DRAKE ESR924i (Receiver) DRAKE ESR1 024 (IRD) DRAKE ESR1224 (IRD) DRAKE ESR1424 (IRD) ECHOSTAR 410 (IRD) For 10 it abitron Antenna — Just a partial listing of hundreds of products in the Skyvision catalog. Askfor your's today! $459 $919 $709 $877 $1099 $1255 $1449 $1869 $1439 $599 $1037 $1165 $1369 $899 Add' $1349 $1309 $1539 $1693 $1889 $2299 $1859 $1049 $1487 $1599 $1799 $1349 $166 Skyvision Inc.* ocdCa^ 1 All Major Credit Seo° W f, $£* ^ cards Aecapted citcte WW 1046 Frontier Drive, Fergus Falls, MN 56537 - Toll Frae 800-334-6455 Mail in coupon or call Toll FREE today lor tfie SKYVISION Satellite TV Product Catalog. Delivered free to your mail box in U.S. and its possessions, * International requests add $8.00 to cover shipping and handling. Qsend Skyvision Satellite TV Products Catalog Name PhoneJ 1 Address. City State. Zip- Install A System, Upgrade & Repair Yourself And Save $$$$ CIRCLE 234 ON FREE INFORMATION CARD Z s m m 33 54BM Z - Tac *Test Chips * Plus 'Top Of The Line Products Only* (Raw SSAVI Like New-Call) (Raw Oak Sigma's New-Call) \3T (Caution) This Device Is Sold As A Test Aid Only To Help Service And Repair Surplus Or Privately Owned Cable Units Only. Any Cable Owned Signal Must Have Their Consent And All Channel's Subscribed To I (BO'S) HI-TECH PRODUCTS To Order (800)722-9381 Inlo Tech Support - (313)722-9381 I i -Tech Sprays & Zappers (Where Legal ) Highest Quality Products CIRCLE 291 ON FREE INFORMATION CARD Toner Cartridge Recharge Kits— Supplies—Service Everything you need to recharge toner cartridges used with Canon based laser printers and personal copters. Use with HP: LaserJet, LaserJet 91, IID, IIP, HI, HIP Apple: LaserWriter, LaserWriter liNTJINTX, QMS: Kiss, PS-SOO, PS^10, Canon: LB-P8A1 ,A2,ll, OKI, NEC, Ricoh, etc. With our Kki—S«ppU*s—S*rific* you can start your own profitable recharge business or just recharge your own cartridges. Model Recharge Kits/Supplies Dealers Please Call TR-300 Recharge Kit for CX type laser printer engines. $21.95 TR-302 Recharge Kit for SX type laser printer engines. $2630 TR-304 Recharge Kit for HP IIP (LPB4) laser printer. $21 .95 TR-325 Recharge Kit for PC-10/12/14/20/24/25 copier. $25.50 TR-370 Recharge Kit for Sharp Z-5Q/55/70 copier. $34.95 4080 Replacement Toner Kit for Ricoh 4080 laser. $35.95eW6 6000 Replacement Toner Kit for Ricoh 6000 laser. $14.2Sea/6 9710 200 grms of high quality blade toner for CX $9.95ea/12 9730 250 grms of high quality black toner for SX $12.50ea/12 801 1-Blue/Br 200 grms of Blue/Brown toner for CX & SX.$22.95«a/12 8057 150 grms of high quality black toner for PC $10.95ea/12 FcIt-CX,SX replacement treated felt for all models. S0.90ea/12 SS-CX,SX seal strips for sealing in toner for rcshipping $0.85ea/12 DPP Drum Padding Powder (pixie dust) $12.95 EverDnan™ OPC drum life extender agent. 40+ applications $41.95 C2094 3M Toner Vacuum with attachments. $199.95 Instructions Available Free to Customers! Call 800-221-3516 ask for our catalog. Chenesko Products, Inc. 2221 Fifth Ave., S4, Ronkonkoma, NY 11779 Call: 516-467-3205, Fax: 516-467-3223 to o UJ 6 Q 1 ft took some tireless effort to finally put the wheels in motion, No one would argue that people with disabilities deserve equal access to public transportation. But it took your support to bring the issue to the fore. And the Americans with Disabilities Act to finally make it law. Thank you. Because public transportation is for everyone. U< OCEAN STATE ELECTRONICS PROFESSIONAL, AMATEUR, OR COMMERCIAL — WE'RE YOUR ONE STOP ELECTRONIC SOURCE CALL OR WRITE FOR OUR FREE 96 PAGE CATALOG 1-401*596-3080 ^ SIGNETICSNE602N Bahflotd MoanOSC PflwftiCwwfl towmwiwi lor t*j4*ng DC »d hjw»*« S 2 . 2 5 BUY30RUOP.E..S1.S9 ANTENNA INSULATOR L^iir- m^M . dirjfih moUod HM pt 4*1 e oifcxirc ««ngtn * enmD#™M» lo jft to c/ fc3u*g or bnutt}* under iflptct or mvw Mnpviiurt otwipf woifhwproQl S2.Q0 pur RECTIFIER DIODES 1M-SO0". 1N4002 1N4003 1N4004 1N4O05 1N4006 1N4007 (N5400 1NS401 1 '!"J02 1N5404 1NS40G 1NS407 1N540S 1 AMP 50 PRV .0» 1 AMP10OPRV .0? 1 AMP ZOO PRV .to 1 AMP 400 PRV .10 1 AMP 600 PRV .« 1 AMP 600 PRV .11 1 AMP 1000 PRV .17 3 AMP 50 PRV J» 3 AMP 100 PRV .2© 3 AMP ZOO PRV .20 3 AMP 400 PRV .25 3 AMP 600 PRV .25 3 AMP 900 PRV .25 3 AMP 1000 PRV .25 IN34A ha no io f so G^rrwriuimQioo* 1-30*!' and SWH Simp rnwmnfi «t *50vt. CD224G2E CMOSLSISYrcG^wps-f tots ^fl* 1 FILAMENT TRANSFORMER 6. 3 VCT AT 3 AMPS 2 K4T. r T7rrO 1 17-TH S5.9S MAGNET WIRE PU»n •p*m*l SOW bin «pp*r For wmtag coil , uajittorron wd lorodt Pish Igt 1M b V»ok #24 3.70 W4 4,80 #28 *,TS we 4J0 -29 . 3.15 #38 4 95 *30 4,00 MO 110 •32 4.40 TOROIDS IRON T-MWt 40 T-J5-0 „..„„. .40 T-37-8 ,*» T-37-12 40 T-SO-2 _ 55 T-50-3 OS T50-8..,, 55 TBO-0 .75 TBS-2 75 TB8-6 75 TOM 05 T200-3 4.00 PER RITE FT37.43 „..BC FT3T-*1 „.,e0 FT37-77 _.. .SO FT50-43 7S FTSM1 75 PTBO-T7 7B PT82-43 1.00 FTB2^S7 1.00 FT82-68 1.00 FT11*4I1 2.18 FT1 40-43 ......4.10 FT240^1 . 0.00 WE STOCK A COMPLETE LINE OF TOROIDS AND BEADS. Q-DOPE SS*ACnc*pur»pOtfltyr»nitii toVWTt [>s« tad and taavti ■ iSt*r ptt^mcivm cooing on tonotJt , oo* vti tf oVwa"onTi»™, wtti no or mrmtaJ *n*a en mduav* runt ttayifeo b# intact a* t ctwnart 1w motfad Of JrtKka£*d fl*Trxrriifl*c rtovrwr jrou c*i pm poml HrtltK* a EjOaVl'Yt OIH *04tt and hKam* ivnjbnaOui} S1S.95 FISH CALLER Th* F «ft Can*-. **-tm connlMtd. muiH a c»Gfci*ig Kund that Uwutf attract hynpy F«h r ttv* «c«ni]r J7.95 LOGIC PROBE Hwd «d Ogul Loos Pro» proinott conwinvnt vid pnK«4 UH in tfw rm m / wv m t or toys qroun It ooplfcinl Idok Invoi [hfllt or loix] . piAtw utd WKifl* Irantwttt down 10 300 rvwo«*xnoi HigrMritmi.ly LEO ruadoutt pronoj misrt 1 19 tn» teqc lt*it S1S.95 CD m 3J i CIRCLE 231 ON FREE INFORMATION CARD 54BO Part IDC £34.99 Part 6 Oscillators $34.95 Part2AC $34.95 Digital 1 $34.95 Part 3 Semiconductor $34.95 Digital 2 $34.95 Part 4 Power Supplies $34.95 VCR Maint&Rep. $34.95 Part 5 Amplifiers $34.95 Intro to VCR Rep. $34.95 LeiurmMg El^te^ics Huns mefoar b®eoa Emsw! These Computer Animated VHS Video* Vividly Illustrate Important Electronic Coacepts You Derservc the UCANDO Advantage. Order yours today! For PAL Tideos Contact: Electronic Asaembry Co. P.O. Box 21191, Edgeware 8030, Christ church. New Zealand Visa ft Master Caid Accepted Mail Check or Money Older to: UCANDO Video* P.O. Box 928 Greenville, OH 45331 Bach Video is app. 55 Min. long Call Toll Free 1-800-678-6113 C 1JI7 DCANDO VCKB CIRCLE 237 ON FREE INFORMATION CARD great for robot enthusiasts ! CO O z O fl. i- o s LD 6 D £ lead identification data included GEARHEAD STEPPER MOTOR ts.se OPERATES ON 1 2 VDC 7.5 DEGREE STEP ANGLE' approximate dimensions : gearhead 2-3/4' x 3' motor1-1/2 , x2-1/4 , dia, shaft 3/8' dja x 2-1/2" length 12 VDC GEARHEAD MOTOR $12.50 1/8" dia x 1/2" length direct drive motor shaft output 1/4" dia x 1-1/4" length gearhead shaft output gearhead approx. 2-3/8" x 3" V motor approx. 1-1/2" x 2" > ELECTRONICS, INC" 81 23 PAGE BLVD * ST. LOUS, MO 63130 (314)427-8116 8222 CHESAPEAKE DR. ■ SAM DIEGO, CA 92123 (619)279-6802 2525 FEDEHAL BLVD * DENVER, CO 8021 1 (303)458-5444 8880 WESTPARK DRIVE " HOUSTON, TX 77063 (71 3)978-6575 MAIL ORDERS CALL TOLL-FREE 1-800-669-5310 ELECTRONICALLY SPEAKING, GATEWAYS GOT IT ! c — . Radio /Tech Modifications n rrrn li RADIO/TECH MODIFICATIONS" SI 0.95 A must for every HAM library, this book provides detailed modification information, (such aa expanding frequency spectrum to commercial frequencies),forAtinco, Icorrt, Kenwood, Yaesu, and other radios. Well written and easy to understand, it is sure to be a favorite ! • • BEEP BEEP !! CAR SOUND SYNTHESIZER $6.95 S -^ With the press of a button you can create the sound of a car engine starting, a car shifting gears, or the sound of a car horn. Works with power of 6-1 2 v (a 9 volt battery works great ! , or use a cigarette lighter adaptor to hook it up in your car 1 Also great for bikes !) dimensions : 3-1/2*x3-1/2*x2" >■- J THE FINE PRINT : PRICES SUBJECT TO CHANGE WITHOUT NOTICE GATEWAY IS NOT RESPONSIBLE FOR PRINTING ERRORS SUPPLY OF SOME ITEMS IS LIMITED PRICES DO NOT INCLUDE SHIPPING MASTERCARD AND VBA ACCEPTED , "\ ^BABY CHASER / BOSS ALERT A $9.50 Eb This two-piece alarm unit allows you to keep track of your camera bag, purse, or little Cindy-Lou. Clip the receiver to your belt or slip it into your pocket, attach the transmitter to your toddler or drop it in your camera bag. When the transmitter and receiver get too far apart (about 15-30 feet) , the receiver will beep. A minor adjustment to the circuitry makes the unit beep when the transmitter and receiver get close together. If you can get him to wear It, it's a great way to know when the boss is heading your way ! ! ! (includes batteries) (approx. dimensions revr: 2-5/8* x 2* x 9/16' V xmtr: 2-3/8' x 1-1/2 -x 7/161 V V* copy - Iron - etch PC BOARDS 1-2-3 EASY with TEC 200 FILM 1] copy circuit pattern on TEC-200 film using any plain paper copier 2] iron film on to copper clad board 3] peel off film and etch 5 sheets, 8-1/2" x 11" $4.95 instructions included COM PACT AB SWITCH $10.00 BIG DURABLE FRONT-PANEL PUSHBUTTON SWTTCH, AND VELCRO FASTENING STRIP MAKE THIS THE PERFECT LTTTLE DATA swttch. Mount rr under the desk, ON THE SIDE OF THE COMPUTER, PRACTICALLY ANYWHERE ! SPECIFICATIONS: I/O Ports : RS232 25 D female connectors Connections : R5232 : 25 wires fully connected Enclosure : High-impact plastic Dimensions : 73mm X 25mm X 11 3mm No power required 54BP CIRCLE 240 ON FREE INFORMATION CARD DANBAR SALES CO. 870 W. CIENEGA AVE., UNIT 1 , SAN DIMAS, CA 91773 (714) 592-2940 FAX (714) 592-9518 HEWLETT-PACKARD 853A/ HP 855 8 B Spectrum Analyzer Display with spectrum analyzer plug-in. Goes from 0.1 to 1500 MHz, 1 KHz resolution, -117 to + 30 dBm amplitude range, calibrated. $ 6500.00 HEWLETT-PACKARD 8640B AM/FM Signal Generator, .5 to 512 MHz, 4 19 to -145dBm RF output, counter, phase lock. $ 2650.00 HEWLETT-PACKARD 3586B Selective Level Meter Makes carrier frequency measure- ments to 32.5 and voice channel measurements from 50 Hz to 100 KHz. Works with HP3336. $ 3250.00 HEWLETT-PACKARD 8620C W/ HP 86220A. Sweep oscillator mainframe with RF plug-in, 10 MHz to 1.3 GHz. $ 1750.00 WAVETEK 2002A Sweep Generator, 1 to 2500 MHz, in three bands. A fourth band cov- ers the entire range. Internal harmonic markers. $ 1795.00 HEWLETT-PACKARD 3336B Synthesizer/ Level Generator Bell standard, 10 Hz to 21 MHz, 4 output Z, AM, PM modulation .01-99.99 sec. $ 1250.00 HEWLETT-PACKARD 8620C Sweep oscillator mainframe, uses 86200 series plug-ins, sweep and cw function. $ 750.00 HEWLETT-PACKARD 8660 A W/ 86601 A & 86632 A Synthesized generator mainframe with HP 86601 A RF generator plug-in, 10 KHz to 110 MHz. Also with HP 86632A, RF generator plug-in, AM/FM modulation. $ 2200.00 TEKTRONIX 576 CURVE TRACER Accept 3 different test fixtures, delivers up to 220 watts, 2 or 3 lead devices. $ 3250.00 HEWLETT-PACKARD 8620A W/ 86230 B Sweep oscillator mainframe, plug-in goes from 1.8 to 4.2 GHz. $ 1200.00 TEKTRONIX 7633 Storage oscilloscope, 100 MHz multimode storage, comes with (2) 7A18 dual trace amplifier, DC to 75 MHz. (1) 7B53A, dual time base. „ „ __, __ $ 1150.00 WAVETEK 1067 Sweep generator, 1 to 400 MHz, primarily for CATV use. + 10 to - 55dBm calibrated output, RF output 75 ohm, includes manual. $ 795.00 HEWLETT-PACKARD 1645A Data Error Analyzer, SYNC/AS YNC operation, will determine, out of lock, received data inverted, bit error, carrier loss, clock slip among others. $ Mfi _ 00 TEKTRONIX 7704A Oscilloscope mainframe 200 MHz BW, CRT readout, comes with the following plug ins: (2) 7A26, dual trace amplifier, (1) 7B80 delayed time base, (1) 7B85, delaying time base. * SPECIAL * $ 1250.00 HEWLETT-PACKARD 435B Power Meter, comes with HP 8481 A power sensor & cable. Power range -25 dBm to + 20 dBm with 8481 A. $ 1150.00 WANTED: ELECTRONIC TEST EQUIPMENT Call or fax us your list. V. All test equipment has been tested and is guaranteed to be in good working condition. > r WE ACCEPT VISA AND MASTERCARD. m 03 m XI CIRCLE 244 ON FREE INFORMATION CARD S4BQ Big Plans . . . Small Budget ? ? 6805 Microcomputer Development System TECI's MCPM-1 system allows your IBM PC and Compatibles to be used as a complete development system for the Motorola 6805 family o( single chip microcomputers. Many time saving features at an affordable price. MCPM-1 Programmer for Motorola MC6870SP3. PS, U3, US, R3. R5 MCPM-1 w/ driver.assennbler.simutator/debugger $449 MCPM-1 w/ driver program only $349 Also available - Programmer for 68HC05, in-circuit emulators, "How-to" Primer, and many software tools to help you. Call ToD Free 1-800-336-8321 TEClm jXt The Engineers Collaborative, Inc. Rt, #3 Box SC Barton, VT 05822 USA TEL: (802) 525-3458 FAX: (802)525-3451 Call Toll Free (800) 336-8321 THE ELECTRONIC GOLDMINE Ttw Electronic toldmini has one ol lire greatest selections of unique electronic kits a.aitabfe in the wld We have w 65 kite and over 1.400 unique, bargain priced, components in our catalog! INEXPENSIVE GHGER COUNTER PiobacJy to lowm prictd Geiger Cantor ki nraiabts h to fcodd botyl FoalurK ■tniibVa thin wated GMgff Mjetor tub« and tp«akar tor flmrti dicks ti proportion b to notation lavd. Dotocts Bota and Gmrnft ray*. OpwatM from orra SrV battmy (rot hcludwj) Duly? I lea" CG447 $39.95 24KHZ ULTRASONIC TRANSDUCER High oulput utnsdnic transducers for ih h ultra- Bone p«f repflnws, bugler alanrs. rcrroto controls, etc. Size W njvngtw X W Mek. G951 $1.50 ^D 5VDC 3AMP POWER SUPPLY Regulated power supply made by SOLA feature* Hog/sled circuit raguUtor* and prccscn par- (wtthtco. Has short ctrcut pra- tKicfi. bw rippje .and isotaitods output Opacifies licrn SardaJtl 120 VAC. H0J3Q INFRARED D ETECT OR KIT Great tor otearoriic cuartry to respond to ail typat of nfrafod TV, VCR. etc. renrcta conlrofan and LED* producing sound and ightng a bright red LED, BV battery (not included). Size of board: 25 x 1.4*. Cornptee wflh al parts. PC board end Instructions. C5441 $535 ULTRASONIC' PEST REFFJJfH KTT Acoordng to ra- saarch. bw ntenrty uttrasenic sound wawc reprt ntecs •rid sbtuI rodonte. Trio caput of this tot isobnonous to t» past but ts abova tha hawing rang* of humans, dogs, cats, and birds w biflery (not hctoeed), Size of board; 25* X 2*. Complete *Kh al parts. PC board and jnttnicfow. C6350 $9.00 PIEZO FAN This fan oparaJas on 110V£OHr Ac and uses a fraction of the energy that standard rotary typos use. Defivere scout 7 cubic ftrmJn eir Ibw. Use tor coding comcut- ers, equipment, etc. G736 55.00 9VDC ADAPTER Converts standard 12QVAC to a narad 9VDC for powering anything that requras A 9V baflwy G533 $1J5 Two aaparata high pawar amps on on* PC board Each amp has ts cvffi level controf and puts cut an hcracbble 20 watts RMS, Faafejras red LED "on" hdrcaicr and bw dtttxtian circujtjy. Great stereo booster amp tor your car sound system. Uta witi arty speakers capable of handtog at toast 20 watts. Operates en 12VDC. Size of board: & x 225*. C6442 $1935 CIRCLE 281 ON FREE INFORMATION CARD MINIMUM ORDER: $10.00 plus $3.50 Shipping and handling We accept MC. Visa and Money Orders SEND ORDERS TO: The Electronic GokJmme P.O. Box 5408 Sosttsdale, AZ 85261 PHONE ORDERS (602) 451-7454 FAX ORDERS (602) 451-9495 CIRCLE 254 ON FREE INFORMATION CARD IMMEDIATE SHIPMENT UNIQUE EASIER TO USE International MicroPower Corp. We put the DESIGN back Info kit design. SCHEMATICS AVAILABLE SURFACE MOUNT COMPONENTS PRE-ASSEMBLEDTO BOARD ALL NEW DESIGNS CO o o y LU 6 Workf s FIRST hobby kit for CALLER LD. See WHO IS CALLING before answering the phone. Simple to use: — Plug into standard mil jack — RS-232 to PC or serial pmter IHCCID-1K kit 138.00 IMC -CI D- 1 A .xam i M $45.50 Opfionti SsfiMw daunt to ea?*y aft* m PC art Nod fe d a ■«, IMC-CIDSW-1 $6.50 (Crf* ID. tv« J»t mfrtte **n>tfi*t.ChKfc wfi ]w !oea pfw» e*fnp«ir.) ULTRA HIGH RDEDTY WireleK MicrophoneTransmitler UNDETECTABLE WireJess Telephone Transmilter wih automatic banery saver Ttxsse fU mnsin ills demoB are surarlof p ofha H S. Yen oe( modi m«o ia vour mtney with De tokuwig IsaMas; (oompara t> othwih ^TrutVwKUMr^SS-ICIiMHii-Rnsnnvdui^ie^affi-IU^luntin^bro^ tonpaatn or iMtinj Wireless Microphone Transmitter IMC-WM-1 $39.50 ATTENTION: COMf LETE SCHEMATICS ONLY W.S0 ORDER BEFORE NOV .21, 1 991 AND RECEIVE EITHER A FREE SCHEMATIC OR FREE SHIPPING * HANDLING. Wireless Telephone Transmilter IMC-VrTM $39.50 1-800-992-3511 ORDERS ONLY (SORRY. NO CATALOGS) Jniamotiwiol McroPowtf Corporation 3MS W. Spring MxmMifl Ron), Sum » LuVtgH,hVi»l02 w«,iJ:[CCCtaii5.um.imigww) 54BR HSC's High-Tech Potpourri is your opportunity for savings! Evemx BV100B 14" Monitor Amber Monochrome (simitar to Illustration) "Flat* Low-Glare Screen, Hercules compel. Factory RelurtM, 6 Mos. Warranty HSC# 12530 579,00 t& dbx Noise Reduction Unit for your personal stereo Uses two AAA batteries (not included) For dbx (or type *B" Dolby) encoded tapes. 4 m m x 1 1M" x 1 3/16", with belt dip. Reduces tape hiss, increases enjoyment! HSC#12414 $4.95 r Bulk-packed 3.5" HD Diskettes No boxes, no labels, no toolin' around! Just a plastic-wrapped stack of 25 high-quality, high density (1 .44 MB) 3.5" diskettes. More bytes tor the buck] HSC KM E D-0QO-0O00O2 $17. 25 'package of Z5 & Power Supply Specials! SMS. input Output HSQ* P_dc£ ■A - 110,220 VAC 5VDC@2A 12541 $1S.95 12 VDC @ 1.5 A Compact switching supply • 2.5" x 5.5" x 1 ,25" on PC Board (no chassis) "A" 11 0/220 VAC 5VDC@9A 4751 $9.95 12 VDC @ 3 A (5 A peak) -12VDC(gi1A 15VDC® 1.5A Ckiseout of larger switching supply (pullouts)- 4.5" x 8.5" x 2" (no chassis) ■B- 10928 S9.95 110 220 VAC 5 VDC @ 32 A 12 VDC @ 4 A -12 VDC @ 1 A Closaout of HUGE switching p.s. - 13.5" x 5" x 2.5" on frame. 250 Watts! X" 110/220 VAC 28 VDC @> 1 A 10646 $9.95 Nice linear supply - 5" x 4* x 2" in frame, new in box. Large quantity! Style "A - Style 'B' Note: Illustrations are approximate representations only, and not to scale! if^h #%• ^9 Style "A" Style "B" Style "C" Style "D" SCSI interconnect Cables Style "A" "B" "C ■D" (hiata: Styla *A" And "P" had Wrong pari numbs r» in pravHUJ ads, plea Be da-Ecntoo Wtion enrtenng) DescriBtion i-y> Price 18" Macintosh (DB25P to CN50P) 12938 $7.95 18" SCSI (CN50P to CN50P) 12029 $7.95 5" SCSI Ribbon (IDS50 to ICN50S) 9625 $5.95 SCSI Terminator, External 11397 $6.95 One-Offs, . . Oddments... Objets d' High-Tech trwaa ittraro-ghtbagont byTheibna j«hi roadthti. evttn*y an) inehcitivi oitux v*r*d mtntety beontt 42D7N 40mW Hatam-Cadmuri i bngnt Wual'i Lutr & F*cnw Supply *1 2*5 00 VArtin Aaragraph Model 400 Gas Chrorrialogriph with Mad*! 485 Raccrta* lrte*fae*, Houston irtttnanfrrAi Chan recorder, nunuaJ $4S5.00 Bitf &gn*l C«p*TS-l ISA AP flF Witfrnetet Load T2 oa.| 60Orun.2 - 500 WaH, 2Q - MOO MRi Laige Coaxial Compactor (Typg "C*?i $195 00 «a Viator* Phatoplan Ur»-W*3th Measurement S-yjdem r,&nocu«ir McfOJCOp* wKh DigCll RtaOOUtj 12-Sx Eypt*D*i 10*, E3x ObjscirvaE Lamp, Power Supply, Raadom JT50 M Apptood Metertab Raikectometaf I (2 aacti) $44,00 a*. HP ^BASHFcUgna' Generator *129.M LAraiach Fvkdil GOO Pta!o Claanor \wat used unknown condybon) ¥49,00 ~\ V^ The Lowdown on a great Subwoofer! Ha r»*tom*ihmgHSCdo*t not gatevary day Alksc gaai' Thn ADC SouncfejJwpar Subwoeter {Modal 301 Ef) HimaDIn iix*{ir n7.S"x 1 r> tHX bg cm fwternwiw Ftafttfj outputs both en annate from your ttarao irtpefttr rrto rr. and than hook your tan and right utolkte spaakan onto U output Ewmtnaht. The [jtkI -order cnnsovar sands frequon e*s from 1 1 Hi and abovo to th* uteftftas, and Ih* 41 Jo 1 *5 hte band is r op* oducad by in* 8" dual voice coil, rag r> tru* dr rv* r llcin handtt 150 Witt* pat*. SO Warn FftlS into 4 ohm* Impcd- bacs Thota4*in*t»lhtgN-fMhioniT»UI«criafcoilbU;fK with a at/uclUTaJ Toarn rrarvl Ijont cavof and bUck Iwcturad vinyl ovsrh-ghr-dinsityparticia -board iidori Thaun«atvKy isa8dS«--id9riV/aflanMtt*r)ai^th«whoi*unitwBight 1S-.S fca, Thaia a.ro brand now in Eha carton, and Ml (w S9D u0. but only whaa thay lattl ADC Su bwcKjIcr HSC#1 24S0 $99.00 HSC's Laser /C/7 /s Sac/f... ...af ;f's best price ever! Th# kit that Bf*tlhopnW'b»fiiOrT, tor lat*f*i* lack, and ncwi-rstnatwitofroryat 1 OurowncmtOfn rjtatgnad PC board maasurn Z.25" k 9" and comai with mo* of tna cornpononts you wtf r*ad to gtt a Hfthoni-N*OnJa,ta*uploiOf SMiluWaEa-runnngon 10CVAC; .notji AK you nHd to SUpfiy v ■n anciouft, AC cord ind twitcti, and bUUart tpth&at id*f oronc Sor avary tuba) You should nol aBampt !hi» xjt rf you nj.ya no! bun kits bafofa and davalopad good soWanng [atrvi^ua. n n nol dinHcurl butrftquiies6icaltant*DWarpin(slo»ort:pfopafly Our ragutv pntal tot Una ki tt $4S.0O. but whfcitocXtatia. you cart buy [hakitaiaJal -2 MkttftVan Uwr tuba (LB»d> lor $50.00' Thatuba comas with a mounting bracket and Aldan oonnactor, end wNI* you can cut th« conntotoroff ind solder tha w/iros dkracfly to (ha PC Bo*rd, you may yyirt to buy a mating connector for $& S5 ^ L«3r. Oo.v«r Supply Kn HSO»BuM3 MS.OO iodSS OOtor HSC«1!S» 1 MV.'LuhTum Ferrnl* Alden Htgn Volug* conn*cu>r (luttt *llh ibov* tutw) HSCi12457 15.9* ^ / More Laser Goodies for Advanced Experimenters f"*f£! Electronic Supply Tott Free (Orders Only) 1-600-4 HALTED (1-800-442-5833) 3500f)yderSt.,SantaClara,CA95051 (408) T32-1 573 4837 Amber Ln., Sacramento, CA 95841 (916)338-2545 V 6819 Redwood Dr.. Cotati, CA 94931 (707)792-2277 Epoxy Enc*ptul*led Uti HSQI incut IIO^ZOVAC 11O220VAC tig vac 21 . H VDC' 21 - 31 VDC' 10-UVDC 9 VDC 7 . ».S VDC Cadm- U ■ UHlt. 80005 ::■'-: 12468 112*0 11241 S000D 60015 M0O4 4.25x325 1 1.1 2S S12)M 4 25 < 3 15 » 1 12S S 6500 'Sic Un*v Powsr Supc^- ir Pawtr 3u:ppl:f5 : Otifeul 1 4 • 2.6 KV. 4 - 7 mA adj 1 7S KV, S mA 1 « KV, 3.7 - 5 mA K|. 1 5 KV. 5 mA 1.1-1^KV.3.SmA 1 S-2 6KV.4.6.S5mA«q. 3.75 » IS (1 1 15KV,52mA 425x1 IIS MO- t.SKV.4-SmA 2125K1ji625 N- Nflw. A. AkmiKVComttilor.S-SpKtoHV T ■ RvquMn 6VDC Tlggtr kipm •1SU< Abo« lor 2S VDC-Buy ■ fgr 15 00 w 5p wi M (jtl.Sil 12S 4«1Jn1 125 4i1 5«1 125 * 6« .00 S 3900 S 39.00 »129DO t 49.00 1129 00 £2dl F^A UAT UA UA U H»lium-Heon L*3tr Tub*»: ■4SC« 12477 1247» 112S6 12347 2 mMVaa nom 5m*Winr»m 95-11 -1 2S" 5.75" 1 1" 10.5" It .25" 16 25'Kl.TF' s^fjfl. Nun* t*»»<»»?SMt Paa Sira Qlm fit 95 Blr.Gtus J19 95 11-StHBfidvl *14 95 Alumngnn Tut* $79 95 J Tanrrs Soma quant*** ana Itrnftod. aH rtorns lubjact to prts," site- Minrmum ordariS-IOODplLH Shipping GKfenl unctarS^.OO subjactto $2 00 huxndhng Taa. AJ ordanj ihapp*d FOB Santa Clara, CA. (this m«am you pay frognt'i b/ UPS Surtao* (no P O. Boxvi) uniata oihonnia ipacfiad. in wtiich c#te pravalMng cimar rata plus S5 00 handling laa appKaa. Propaid ordara tor rnarchondi*« amoumt only win ba lhaipaoi tra^ght GOD. Myauhavaqufl-abjntol^iJlyc^OftVBr.callCutiemafSaA*^ CIRCLE 245 ON FREE INFORMATION CARD ? m CD % S4BS SOMERSET ELECTRONICS ^% Announces... THE MICRODEC™ 'SERIES' NOW IT'S YOUR CHOICE1 You select the Model and the features to meet your decoding and budget needs'! Each choice is fully upgradeable to the top of the line! With our new VIP50 Interface you can choose an expanded display (32x16 characters on your television) and hard copy - with or without a computer! prfcM „„, shippinsmimdung FEATURES: MD 100 BASIC MD200PLUS M0300 MAXIM (Compact Size; 1.3Hx5.1W*5.3Q Ust $229.95 List. $329.95 List: $429.95* MORSE; DECODES CW WITH Autospeed, software fitter, speed display ~k ~k ik" RTTY (60,67,75, 1 00 WPM) (major shifts) * * "it RTTY (bit inversion) ASCII (110 & 300 BAUD) ASCII (bit inversion) AMTOR/SITOR Mode A-ARQ AMTOR/SITOR Mode B-FEC WEFAX (with VIP50) Smart display/Intensity control On/Off with volume Serial Interface Code Oscillator AVAILABLE OPTIONS: Display Colors: (Green standard-no charge) Red, or Yellow (your choice) $15.00 NICAD Batteries for portability $29.95 Model VI P50 Adaptor $189 95* "MD300 price includes the VIP50 Interface Adaptor. (TV Stations, phone companies, and public utilities are selecting MICRODECtm for their operational and FCC requirements • FCC Docket 86-337.) Call us for special Introductory prices and orders at 1-800-678-7388. Fax orders: 1-407-773-8097 • Technical assistance: 1-407-773-8097 VISA • MASTERCARD • PERSONAL CHECKS • MONEY ORDERS SOMERSET ELECTRONICS, INC. • 1290 Hwy. A1A, Satellite Bed., FL 32937 CABLE TV "BOXES" WHOLESALE PRICES! CONVERTERS • DESCRAMBLERS REMOTE CONTROLS • ACCESSORIES FROM S9.95H CALL NOW!! -GUARANTEED BEST PRICES- -BEST WARRANTIES-COD'S -IMMEDIATE SHIPPING- LAKE SYLVAN SALES, INC. 1-800-800-4582 phone 1-612-895-9454 fax Do You Know Who's Calling When Your Phone Rings? The Call Identifier has the Answer • display* cellars phono number wtMfi your phone rings • stores phone numbers $79.95pcel with date and Urn* ot call cFiecKArnney order SUP, VEILLAN CE-COUNTERSURVEILLANCE EQUIPMENT CATALOG. ..*5 .00 (eIoTz) P.O. Box 337. Buffalo, HIT 142M ^-^-^S (716) 691-3476 Dealer Inquiries Invited Owe*. wfBi your tocil Phone Co. lor CALLER E servnct waiuijkty CO o z o or. a 6 Connect Muscle Wires to o battery or other power source and watch them contract in length! Remove power, and they relax and are ready for millions mare cycles. Muscle Wires let you create direct linear action without heavy gears, toils, or motors. Use them in robots, models, planes, railroads - anywhere you need small, strong motion. Get our new 96 page Book and Muscle Wire Sample Kit - it has everything you need to get moving today! Tall free: _ M 800-374-5764 Viia, MC, cheek, MO Mondo-trontcs 2476 Verrra Court San LeandVq, CA. 94577 Phone:510-351-5930 Fax:510-351-6955 Book and 5 «"wp| e Kit Only 29-90 " »"««» odd „, Knight Patrol™ Talking Home Alarm Kit A high end alarm system at an affordable price! Features include: Verbally warns burglars away State of the art PCF 8200 Speech Synthesizer 21 Sensor Zones. 2 Arming Circuits 2 Five Watt Audio Amplifiers Auxiliary Alarm Real Time 24 Hr. Clock A 10A & 3A Relay Circuit for Sirens, etc Alert/Sleep Monitoring Modes {verbal status) Trigger Memory (verbal status) Self Diagnostics & Performance Monitoring Microprocessor Controlled Pleasant Female Voice Expand ibility & so much MORE! 4 * t i i * * i t t Aveileblo as ■ kit or pre-ftasombled. Wrrta tor Ire* Into or send S3 tor lull-tins catalog. A complete Una of penpherass Is also available. Com- plete eireurt board kit $253.00 + J10.50 S i H. (CA residents add 8% lax). Complete systsma starting from J4S300 Instructional vrtoso tap* (VHS SaSS + S2.50 S * H). pdlmlin £ltctronitx 1°425-BSoledadCyn. Rd. Suite 333 Deet OS Canyon Country. CA W mS) 251-8725 "Wt irotftt Eunr cuitlt CIRCLE 255 ON FREE INFORMATION CARD PRESERVATION PLAN ON IT Planning on restoring a house, saving a landmark, reviving your neighborhood? Write: National Trust for Historic Preservation Department PA 1785 Massachusetts Ave., N.W Washington, D.C. 20036 CIRCLE 259 ON FREE INFORMATION CARD 54BT Amazing Pocket Reference! 480 pages of tables, maps, formulas, constants & conversions and it fits in your shirt pocket! ( 3.2" x 5.4" x 0.6") *7*£e 0-teate^t fi&c&et *te£eke*tce <%£ ait ttmef __■ * Electrical The perfect Christmas stocking stuff er! * * Electric Wire Size vs Load Wire Classes & Insulation NEMA Motor Frames Wire & Sheet Guages Electric HP vs Torque Resistor Color Cooes Capacitor Color Codes Pilot Lamp Specs Fuse & Battery Specs RF Coll Winding Data Wire Size vs Turns/Inch Decibel Tables Air Automotive Carpentry & Construction Chemistry & Physics Math Mining & Milling Money & Currency Physical Constants Plumbing & Pipe Rope, Cable, & Chain Steel & Metals Geology Glues, Solvents, Paints and Finishes Hardware Surveying & Mapping Tools Water Weights of Materials Welding Computers & Printers Computer ASCII Cooes IBM® PC Error Codes IBM® Interrupts-IO Map IBM® Memory Map 3200 Conversion Factors • Generallnformation US & State Holidays Signs of the Zodiac Flowers ot the Months Anniversary Names Radio Alphabet Morse & TEN Radio Codes Paper Siass(lml) Military Rank & Grade State Information Climate Data of trie US Time Zones of the US Time Zones of the World Telephone Area Codes World Airport Elevations Lost Credit Card Phone #"s Airllnel-BOO Phone #'s Temperature Conversion Sound Intensities Body Weight vs Height Wind Strength Scale Wind Chill Factors Firewood Comparisons Frequency S pectrum Sun & Planet Data * Detailed index LATEST INTELLIGENCE Now, for the first time, the meanings of more than 35,000 terms, phrases, abbreviations, and acronyms used in the international Intel- ligence, law enforcement, military, and aeronautics communities have been compiled into one convenient, well-indexed volume. If you have a scanner or shortwave receiver, LATEST INTELLIGENCE, by James E. Tunnetl will unlock a world of listening possibilities! CaJIslgn Country Prefix Red Cross Network TV, Audio, CB Frequencies Aircraft / Country Codes Police 10 and 12 Codes Fire Codes / Frequencies Border Patrol Frequencies Repeeter Frequencies Cellular Telephone Frequencies Civil Aircraft Markings Road Condition Codes US Military Bases / Frequencies Goodyear Blimp Frequencies Mystic Star Frequencies Pro Words Security Clearance Basics Country Codes Secret Service Frequencies HOT OFF THE PRESS - IT'S HERE! Pocket PC Re£ An incredible shirt pocket size reference book on IBM® PC's and compatibles. If you're a PC service man, hacker, hobbiest, or general user, BUY THIS BOOK !!! It contains a weaith of hard to find information that took 1 000's of hours to colled. By Thomas J. Glover and Millie M. Young. GREAT STOCKING STUFFER ! • MS-DOS® 5.0 Reference • PC Industry Phone Book with over 2000 main and tech support numbers! • Specs and configuration information for over 1000 Hard Drives II • ASCII Codes, PC Error Codes • InteimptsHO Map-Memory Map • 80286 Hard Disk Types • Printer Control Codes • Cable Wiring, Modem Commands • And MUCH, MUCH MORE Description Quantity - Price Each Total Order $ USA Shipping & Handling $0 to $10.00 $2.00 $10.01 to $20.00 $4.00 $20.01 to $100 $6.00 Canada orders add $1 to above S&H Name : Address: City/State/Zip: Payment enclosed (circle one): Card #: Sub Total Shipping & Handling (see table at left) Sales tax (CO residents only), add 4.7% of Sub total+S&H Alt payments must be in U.S. funds. ORDER TOTAL . Company: ___ Phone:| )_ Check Money Order Visa MasterCard Prices subject to change without notice. Exp. Date: Signature: PRIZM Resources, Inc., Dept 961, P.O.Box 557, Morrison, CO 80465 (303) 979-6054 Toll Free Order Line (800) 873-7157 CIRCLE 260 ON FREE INFORMATION CARD s m Z n m — * 54BU UNIVERSAL TOROID TRANSFORMER PRIMARY!! INPUT: 0-130 VOLTS KMOO Hz OUTPUT: 0.22 VOLTS PER TURN 250VA MAX OLrTPUT VOLTAGE UMJTEO ONLY BY THE NUMBER OFTURHSOFWIRE YOU CW WlNDTHftU THE i.r ID MOLE I THEORETICALLYTWO TURNS - BM VdH §> 250 VA(ma) ■ S6« AMPS USING VERY HEAVY COPPER WIRE. 66 TURNS • 1 4.3 VOLTS $ 17.5 AMPS BATTERY CXAFGEF - POWER INVERTER CURRENT TRANSfORUEP HUNDREDS OF USES BRAND NEW by STACO R&D #470 $1 4.95 comes with plenty of applications information uHy @ 20 Amps DC ROIDIAL CHOKE 2.1 Z OD 0.010 OHMS $3.50 Each 10 @ $3.00 R&D #965 HIGH SPEED, HIGH TORQUE J>M 12 VDC MOTOR gear on shaft 3" length 1 .5' diamtr DOZENS OF OTHER MOTORS AVAILABLE IN OUR NEW 48 PG. CATALOG R&D #1141 (3.95 INSTRUMENT ENCLOSURE Two piece high-impact grey plastic is 0.1' thick and snaps together holding two aluminum panels !(5.r>c 2.6" x 0.13- thick) in place. Black steel mounting bracket included, #1077 weighs 1#shp 10 @ $4.25 each 15 CHARACTER LCD MODULE Intelligent Display- LSIHD4J780 & HM4100 dips Ful ASCII diaracter set - interfaces to 4 4 8 bit mpirs Ideal far battery operated devices! Brand new ■ still in the box! R&Dt1099 $935 5VDC, 2 ma, 3.8S - x 1.75" * .25" 63 -KEY QWERTY KEYBOARD Made by Alps for HEATH /ZENITH. White legends on grey caps. All keys are Normally Open matrixed to two 1 2 - conductor ribbon cables. HEATH 12KC132A 141/2- x 41/4" SALE R&D#766 $2.99 R&D ELECTRONICS 1224 PROSPECT AVE. CLEVELAND, OHIO 4411 5 CALL (216) 621-1121 CIRCLE 277 ON FREE INFORMATION CARD R-E SHOPPER CLASSIFIED CB-SCANNERS CO o o LU 6 THE SCANNER HACKERS BIBLE. 112 modifica- tions. Covering: Pro-2004/5, Yaesu, Kenwood, Bearcat, loom, Frequency fixes, modifications (scan rates, interfaces, programmable channels, improv- ing operation), antennas, laws, cellular telephone operation and frequencies and more!!! $33.45. CODs (602) 782-2316. TELECODE, Box 6426-NV, Yuma, AZ 85366-6426. THE NO-CODE HAM RADIO OPERATOR'S Ll- CENSE IS HERE. PASS FIRST TRY GUARAN- TEED! $4.95 PINNACLE PRODUCTS, PO BOX 1756, BURLINGAME, CA 94011, THE ALC100A Automatic Volume Controller keeps the volume of transceivers and scanners neariy constant whether the received signal is a whisper or a shout. Size 3/4- X 3/4" X 1/4." Price $24.95. CSS Electronics, Box 2142, Norwalk, CT 06852-2142. Phone (203) 866-3208. COMPONENTS PLD DESIGN sales and programming service: A complete PLD service at affordable prices. New AMPALI6R6PC S .99 each, other types available. CALL 1 (800) TED-HEXS. AUDIO-VIDEO-LASERS LASER ITEMS list. Send SASE Mikes Laser Facto- ry, 132 1/2 East 3rd Street, Dayton, Ohio 45402. FREE HOLOGRAM with $2.00 shipping. Any LASER PROJECTS patterns for: Lightshows. Op- tics. Measurement. Alignment; and ANIMATION! HOLOVISION. 2536 Alki Ave. S.W., #203, Seattle. WA 98116. ND: GLASS LASER ROD BLANKS, THREE INCHES BY ONE QUARTER INCH FOR ONLY FIFTY DOLLARS. When these rods are optically finished, they can provide above ten Joules of op- tical energy. Free catalog available. Lasers, 7403 Bent Oak Drive, Port Richey, FL 34668. MISCELLANEOUS ELECTRONICS FOR SALE IS IT true... Jeeps for $44.00 through the U.S. Gov't? Call for facts! (504) 649-5745 ext. S-1 1066. TUBES. OLD stock from radio-TV stores. Extensive listings $1.00 (refundable). Diers, 4276-SC2 North 50th Street, Milwaukee, Wl 53216-1313. BATTERIES GALORE for all your electronics and household projects. Every type available. Free cata- log 1 (800) 657-5929 or write PO Box 9932, Mapiewood, MN 55109. HIGH VOLTAGE RECTIFIERS! 6,000 volt 1 amp $4.50 each. 8,000 volt 1 amp $8.95 each. 14,000 vott 1 amp $13.00 each. Add $2.00 shipping per order. Spi-Ro Manufacturing, Box 5500-A, Lakeland, FL 33807. (813) 646-7925. TV NOTCH FILTERS. BROCHURE $1.00. MICRO THinC., BOX 63/6025, MARGATE, FL 33063 (305) 752-9202. HEAVY DUTY INSULATORS 1/2" dia. $2.95, 3/4" dia. $3.45. 1" dia. $5.95. You pay shipping. Slack Enterprises, 101 Royal Park Drive, Apt 2H, Oakland Park, FL 33309. RFI-TVISOLUnONSrlnterference kit RFI-2" Over $33.00 value, only $15.00 plus $2.50 shipping. In- cludes assortment of ferrite toroids, beads, andspiit beads for keeping interference out of TVs, stereos, computers, telephones, etc. Instructions included. Other kits and ferrites available . Free brochure. Spi- Ro Manufacturing, Box 5500-B, Lakeland, FL 33807. (813) 646-7925. HAM GEAR FOR SALE DIGITAL VOICE recorder. 60 seconds record/play- back time, user expandable to 4 minutes, $84.95. DVR chip with data sheets. $12.95. VHF FM crystal controlled transmitter chip 3 for $10.00. Add $3.00 for S&H. C&S Electronics, PO Box 2142, Norwalk, CT 06852-2142 Phone (203) 866-3208. RFI-TVI SOLUTIONS! Ferrite beads, lorofds, reds. interference and balun kits, etc. Free brochure and tech sheet. Spi-Ro Manufacturing, Box 5500-C, Lakeland, FL 33807. (813) 646-7925. PLANS-KITS-SCHEMATICS INDIVIDUAL PHOTOFACT FOLDERS under #1400 $5.00 others $7.00 postpaid. Loeb, 414 Chestnut Lane, East Meadow, NY 11554. (516) 481-4380. DESCRAMBLEH KITS. Complete cable kit $44.95. Complete satellite kit $49.95. Add $5.00 shipping. Free brochure. Summit RS, Box 489, Bronx, NY 10465. No NY sales. BUILD OR buy assembled, four digit SWR & power meter, with alarm & set points. Plans available. Free Information, Rupp Electronics, 5403 West- breeze, Fort Wayne, IN 46804. (219) 432-3049. BLACK BOX BIBLE. Collection of 16 + cable, satel- lite and video stabilizers schematics covering: Vid- eoCiphers, Oak, Cable (Sinewave, Jerrold, Tri- Mode, Universal. SSAVI) and Macrovision, $33.45. CODs (602) 782-2316 TELECODE, Box 6426-NV, Yuma, AZ 85366-6426 54BV I * ELECTRONIC <• PRODUCTS and KITS NEW CONCEPT! Mystery Levitating Device Remember War of the World*? objects float in air and move to the touch. Defies gravity, amazing gift, conversation piece, magic trick or great science project. AHT1 K Etsy to Assemble KH I Plans ■ .... S1 9.50 Combination Solid State Tesia Coil & Variable 100,OGOVDC Generator p*,. Experiments Using Tests Coil: f-b2i£~~ " Plasma in a Jar/Tornado, Furnace HW ^Kiriian Photography • Wireless Energy Transmission * Induction Fields ■ Pyrotechnic Effects • Corona and Brush Discharge ■ Energizer for Neon Plasma Tubes Experiments Using Hi Volts DC: ■ Plasma Blaster Driller/Cutter • Anti -Gravity/Force Fields • ion Reaction Motors • Lightning Generation • High Ion Source ■ Ozone For Air Purification • Electrification of People 4 Objects Particle Accelerators/Atom Smashing ■ High Energy Capacity Charging HVM7 Plans Complete System $10.00 HVM7K Complete System Kit/Plans $149.50 TCL4K Tesia Coll Only KiVPIans $79.50 115V19AC Wait Adapter for 115AC $9.50 jperatK'MSYDClK Field Use alts VAC For Laboratory Use Solar Power! All New! Free, Clean, Saie —■ — " ^*"\; and Plenty for All s^ / i \ SOU 4" Dia., .5V, 2A Silicon Cell & Plans .. . $7.50 SOL2 6x12", 14V, .2A Amorphous Cell & Plans $6.50 Solar Energy Kits / Build The Following; SOLH1 Motor Kit For Science Fair $14.50 SOLIT1 12" Multi-color Neon Outside Lite Kit $34.50 SOLCH1 Charger Kit With 6V9A Battery .. $24.50 SOLSHK1 Shocker Kit For Objects, Fence, Bug Zapper $29.50 Solar Furnace Use the power of the sun to build a device that can melt metal! Easy to build, excellent science fair project. S OLFURU Data Sheets, wiBig F resnel Lens $14.50 Plasma Fire Saber \ Shocker Force Field / Vehicle Electrifier - Near little device allows you to make hand and shock bails, shock wands and electrify objects, charge capacitors. Great pay back for those wise guys who nave wronged you! SHKIKjj Easy To Assemble Electronic Kit . $19.50 100,000V Intimidator / Shock Wand Module Build an electrical device that is affective up to 20 feet. May be enclosed for handheld, portable field or laboratory applications. ITM2KM Easy to Assemble Electronic Kit . , $49.50 Blaster Blitzer Device - our answer to legal. effective personal protection. 20 shot capacity disables attacker for up to 30 minutes. Also marks subject for identification. Mini spray can with 8-10 ft range. BLTZ1 Ready to Use $12.50 Invisible Pain Field Generator Shirt pocket size electronic device produces time variant complex shock waves of intense directional acoustic energy capable of warding off aggressive animals, etc. $8.00 IPG7K Kit I Plans $49.50 Produces the spectacular effect that captured the fantasy of millions of movie tarts. Visible plasma field is controlled by grip pressure and adjusts saber length. Active energy field produces weird S bizarre effects- Excellent for special effects. Specify photon blue, neon red, phasor green, or stem re purple. PFS2 Plans .... $8.00 PFS2K Kit/Plans $49.50 $pedal Offer PFS20 Assembled reg $69", $59,50 Dancing Plasma Lights - Neat electronic circuit causes the discharge in fluorescent and gas lamps to move to sounds and music. This is one of the best devices to use with your stereo music system for a lantastic display effect. Easy and simple to install. DPL1KM Easy To Assemble Electronic Kit . $29.50 IPG7 Plans . IPG70 Assembled $74,50 Homing / Tracking Transmitter Beeper device, 3 mile range. HOD1 Plans .... $10.00 HOQ1K Kit'Rans $49.50 Listen Thru Walls, Floors Highly sensitive stethoscope mike. STETH1 Plans , . . $6,00 STETH1 K Ktl'Rsns $49.50 3 Mile FM Wireless Mike - Submtntatunt Crystal clear, ultrasensitive pickup transmits voices and sounds to FM radio. Excellent security system, warns of intrusion. Become your neighborhood disk jockey I Monitor children and invalids. FMV1 Plans $7,00 FMV1K Ktt/Ptona , $39,50 Telephone Transmitter - 3 Miles! Automatically transmits both sides of a telephone conversation to an FM radio. • Tunable Frequency ■ Undetectable on Phone • Easy to Build & Use ■ Up to 3 Mile Range • Only transmits during phone use VWPM7 Plans .... $6,00 VWPH7K K lt'Ptans $39.50 Automatic Telephone 4| Recording Device Connects between telephone and recorder ■ No power req needed ■ Undetectable ■ Crystal Clear * Extends Tape Time Special Offer! TAT30 Ready to Use . reg 24" $14.50 INFORMATION UNLIMITED Dept RES11, Box 716, Amherst, NH 03031 Phone: 603-673-4730 FAX 603-672-5406 MC, VISA, COD, Checks Accepted. Please Add $5.00 Shipping & Handling with many more torn* FREE with Order, Or Send $1 P&H Body Heat Telescope ■ ai lasti a device that can detect people and animals at considerable distances. Excellent for intrusion alarms, detecting hot spots on objects and people. BHT1 Plans .... $10.00 BHT1K Kit/Plans $99.50 TV & FM Joker / Jammer sm pocket device allows you to totally control and remotely disrupt TV or radio reception. Great gag to play on family or friends. Discretion required. EJK1KH Easy to Assemble Electronic Kit .$19.95 Visible Beam Laser High Brightness^ red HeNe laser visible tor miles. Produce your own light show • see HoloDlscs (below). Projects a beam of red lite clearly visible under most circumstances. Can be used to intimidate by projection of a red dot on target subject. Also may be used to "listen in" utilizing our laser window bounce method 4LUS1 . Easy to Build Modules Produce A Working Visible Laser: LAS1KM Kit wj 1 MW Laser Tube, Class II . . $£9.50 LAS3KH Kit w/ 2.5 MW Las er Tube, Class IIIA$99.50 Hoio Discs™ Laser Lite Shows All new patented concept! Produce your own animated _ special effect lite shows. Uses one of systems (see LAS1 KM and LAS3KM above). Mufti - programming disc with full instructions. Extremely simple to use. HODSK1 Holo Pise™ & Instructions $43.50 "Laser Bounce" Listener System allows you to hear sounds from an area via a lite beam reflected from a window or other similar object. System uses our ready-to-use LATR1 Laser Terminator gun site as the transmitter The receiver section is supplied as an easy-to-build kit, including our cushioned HS10 headsets. Order # LLIST20 System, Includes our LATR1 Ready-to-Use Laser Gun Site, LLR1K Special Receiver Kit, and HS10 Headset, all for only $299.5 Visible Red Laser Diodes 670NM Toshiba. All new, toll spec. #VRD1 3mw Laser Diode & Plans to Build a Complete System . $4950 See In The Dark Viewing Device uses invisible infrared illumination for seeing in total darkness. Excellent demonstration of night vision .along with observing lasers and other IR sources. Functional unit, many useful appiicatioi S05 Plans .... SD5K KitPlans Basic 6032 A 1 st Gen Image Tube IC16 2nd Gen Image Tube PBK3K Power Supply Kit 10.00 $299.50 $99.50 $129.50 $44.50 r , ha t ^XISOOO has worn off and &Te yoU g omg ^ ^ ^ "This w^te P°* lUctu a\ly put > s Js and easy » f^'^y or dangerous che ^ ^.n ^ It has saved me ' _ 8 it Thanks Jim Wenstrom for the original report and for permission to run it again. Call us at the factory for information— or to order direct. We'll also send you a brochure on our other product, Conducto-Lube— the silver-based conductive lubricant. P Cool-Amp Conducto-Lube Company 1 5834 Upper Boones Ferry Road • Lake Oswego, Oregon 97035 (503) 624-6426 . Fax (503) 624-6436 54BX CIRCLE 250 ON FREE INFORMATION CARD SPECIAL PRICING on A.W. SPERRY DIGITAL MUL TIMETERS from cL£C \acs TscumAsrsa r SERIES MODEL DM 8100 Digital Multimeter ■ ■ -;jiin--i.ii V (isj'i deop-prnat heavy-duty autannaiog DMM I !t«; !? Ui.rri.-nr!* mi 3? ranges Fused -TiAAC-'OC Range, Hi* lo Power Ohms, salety yellow and Auto • ; ' lhe fechmasfer series one of the musl feature packed ' ■ne-sn iignsl miilljmetent dp itw market rndiy R«jet MOmV/ajB/aOflOXNik; ?■;*>' ?(W7Wai: 2TIC*iA.?nni.'3mmA^ JOAdt: ?«■:." ■■ i A /3)A* <">i 'K.'7f»(-J(m:?MiJfllOK:..' 20M iJWx-- - t> ■•'■■ V, i«)K,/2r>M[?0iW-in. uo :■-■ DIoflttBfl liiiniinniiy iral $107.96 MODEL DM-8200 Digital Multimeter icesnon i rimit irnD-oronf tieavv-ddiy auioranqing DMM *it h na'gMof- o*< "n* capaollity p' i*arimg i? functions on i? 'anaes c jsed 70AADDC Range Hi & Lo Power Ohms ana'mt ■wa- iDf diSDiay safety yellow snd Auto-or? mat - sow oi lhe most feature packed staie-ot-lhe-arf t-giial rnumnwiers Wr lhe market today RtnqK SOflmV'' ■ -i- nnnvdc ^'OTTOWac 20CkjAi?m^/.?ortmA/ l ■'■ ■ 'VuUttvllOnillHOmHWiar Tmmiwizmt ;->Mi;tjf!OXI/20M(2nO«'IDIHi W a/20* 'TOW'PMtVriBKr ?OM42DnOK'<1Cn l.o W Res tunctmn Lntqir Indiatoi Oimle tesl Continuity tB5t S1?f5 9S MODEL DM-8300 Digital Multimeter ligil hop-proof ltMvY- - dtgitaJ muttimetftrs on the marke! today fangs- 'YOmV, 1 t!UnV(lf.:?»M'J0fl,'7TnVar ^VaWJMOfTiA -II.,,-, Bm/JfJOmA 81AfM 8XM» WOO* 'Mian* 1'fW TO, IIJlHin:2*'?riK/m/i?Mt?uun ••= i ' m C Temp Ret to notion Loqic miratnt niocfe Ibs.1 Cn'rrdnuity tesi 1)52.96 3939 II ■I m „ „,.. F ,"> — MM • • • m MODEL OM-84O0 Digital Murtimpfer ■ , ■ . !'.■'■' ■ f v ■-.].-. safety .- * (used 20AAI t-: - u matte ■ ■'-'■ i'- digital trull i rrtajicn Wlay (hap* WWV'*/40'4aW ■OffilVnc jayiiVA'W'MI.""**'*- *KV)A. , 4m;4flni:4»>iiA,3(lArK tfftyA 4ml« 4/nrod JDlaf mn.'4K-'«i1(..'«0K: , 4M'«IMi«0MO: ji. .:nk .ui* moiKH -J-. mJlBrtW '> teatiKC patkBd state-ot-it)e-art Sianal inuliimewr" or the martoo todav Rmget *nmV'4(40.rJaw inmudr 4nr)mV'4iifl'JflO' 1 WVar- #wi WOniA tiiiv *lm; 40DioA/3()Aar **>■ IK 40K;4C«t4M'-«WO IX «K/«OKj 40COKHZ 4df*)n'4«)nF V-Xi/ ufv awl Diode test S12S.96 #1 ;.«?3ms *■ B 1 ,.?",, » • • « » -= --»- MODEL DM -8600 Digital Multimeter T his exceotinruii 3' 1 1 rtiort drop-ptool. manual landing DWM Oas trie capacity of n*arJ[ng tj-functksns on 37 rangB. Peak hold, (used 20AAC/DC range, safety yellow and "Auto-nfr make lhe Tfrhmsstei series one ol lhe most featwe packed, state-ol-lhe-art diglial multimeters on lhe market loday Rinots: JOOmV.'-ii'tOi'JOO' IfOOVrtc: mmVHinimimtic. «0f;A/4m/*)m/4(0mA(2!Wdc; WQuAi^OraiWrnAiJuAac; «0,'4K/40K/400t!y4»f4OMO 4K.'4CKJ MXKimmt. Temperature 58° wWftnm. -SO- loWCl '■hi C Logic rndtcator Cfimiouity and Diode tesi SI 3456 MODEL DM-8700 Digital Multimeter This excepimnal 4^ rirghi r>MH is capable of leading 11 functions oo 14 ranges True RMS, duly cycle data hold, safety yellow and A.iir. otr make the Techmasler series ore of lhe most feature psritwi (tare-o"he-art digital mullnnaters on the market today, Rings: 3»rnV -'J I a) 'ffJO n OOOVdc JOOmV II 1 20/200 1 750Vac; ivi,-i ■■'m/?0m. , »OmA/20Adt; 20C,uA/2m/>?Om/200niAi?OAac. <.W«< , 3K,'MQtO , ?Mj'?0Mo: JK;?0K,'4rj0OKH? Duly cycle- 00 to 999S I ogic indicator Diode rest and Continuity test $170,96 MODEL DM-400OA Digital Multimeter .. ... .,,-,■„ . ij.ir.1 ifil llirr-'f- ' - -.-I fv ,1 f --. r ni-- ■i 1 ' sell ■-li ITW TOlihvisi mi- Rinom "n ■■■ - lT(|n,0 niVK A -, - - OT* ->M •**! Jhm Vixii- Binnnuitv $4406 MODEL DM-4100A Digital Multimeter liwul J ■ nig n f^ndheld dignai n the apai ■■ v - r reiujing G tuixdji I irnjes. ■ poweiToiise of - ■ ' , "i * smjiO wit edho -:-'« RjngB : '"i ■.■ I k ■ •■ • fJCitriA u u ■ ■■ ' -'- , ta I 5Vl9Vdi Sal 46 MODEL DM-4200A Digital Multimeter iTus excapuonDl 3 EUgii I iwilllrrnlfli has irie eafiaci^ 01 ■swing - -inges Tnis OWl' . nail v" H*»iga -xrimy TflflJ ifjomii* >n, i ■»■ ■ i- > iiim, t^t. '■"! 20n T(knA 1QM WOK!?!* m !WBK TOM ■ -,, | .-W'9Vr|i IrtMwv ii-^i Hrr 1 m«stoi mr Dii $5646 MODEL DM-4300A Digital Multimeter This exi pn'-^nul 3 dKjIl handheld, ■ -oullimcier has toe capacity of reading 9 tnncnons or. iip io35 ranges MM rfi • rxrwerhoust ot meastiremeni capaoilrry m a small sefl- ronmrasd nnninn Rangn. OTmVi 2.'20/200f JTOVac mnVnWXfil iflOOVrtr JOOjiA/am/aim/jrjOmAy fOAai fiquA(?m<3Dmf?0(SmAj' WM'miZWWKILlWM Ohm ZmffiTOnlJOOalliiiTBif. HFE traoMsin, rpsl ni04f? Tonlm ,,r, $7196 MODEL DM-2A Pocket-Pro fi DMM with UL Approval Big Features are packed In Ihts pockel eakulator sired DMM You II t,no manual/autoranging. overload omipctioo on all ranges, auto-polar ity audible and visual coohnuily indicaliort, bullt-m lest leads. ' booklet- lype' carrying case aesigned ir, lit easily m a stun: pockel Rings: 2OCOmV/2OV,'20OV,i4OOVdc: JOOOmV/ 3W;Si30V,'400Vac JO0j2KI2I»!I TSfKim Ohm. Continuity test $2656 Cal tr write far mt S28 n . Catdtf . Only $4.95 — FREE with order. CALL TOLL-FREE . SAME-DAY SHIPPING 30 N. NUtwMkee Aw. Niles, \l 60648 70*. 2W- 4200 FAX:708- 297-6923 AM $7.50 SMpfi^ end Howlfeig far each mit ordered. IL Residents odd 7% Sates Tax 60dB display dynamic range 40dB spurious rejection 60 uv sensit, ±2dB flatness 1 KVDC. 1v@ 100 MHz max Input as isolated by lOpF ±7%hor frequency linearity '07 SPECTRUM PROBE converts your scope into a 100MHz spectrum analyzer $249 dealer* wanted 30 Day refund VISA/MC Specifications & app. ideas Smith Design 1324 Harris Dresner, PA 19025 (215) M3-6340 X- BAHD TRANSMITTER Miniature (2V4 x 3X x "iTGaAsmlcrostrlp transmitter pro- vides 10 dBm centered at 10,525 GHz. Integrated microstrip pat* antenna elimi- nates the need lor an external antenna. Advanced matching techniques secured good temperaturestability with low frequency pulling. Great for long-range testing of radar detectors, calibration of radar receiving equipment, and point-to-point communica- tion links. $39.00 Complili Assembled Systtnr P«rti 4 Intfruetlon Kit moo Plus $2.00 Sltypiq and Handing P.O. Box 80096, Fort Wayne, IN 46898 (219)489-1711 VIM • MasttrCird • Check • Monty Order ■ COD Money-Back Guarantee PRINTED CIRCUIT KITS ER-4-KIT lets you copy art from this magazine onto your circuit board. Complete kit includes everything but exposure bulb. Shipped UPS to your street address (no PO Boxes) for $39.95. Full Catalog of other PC sets and supplies, dry transfer Titles, Patterns, Symbols, Wire- markers, etc. sent FREE Just call or write to: DATAK, 55 Freeport Blvd., Sparks, NV 89431; 702-359-7660. Cablmz=zfMi Ordcn only all t-SC&4S2-7!m Aids lafatroMJon (213)867-0081 W O z O DC H O u, ID 6 a I 54BZ Test chips for TOCOM 4c ZENITH. Fully activates unit in just minutes. OnlySSOea. Great quantity prices! hajjj Nix luf a* in aH; «, a^ml ™»ij F-or ™ - ■ ml tai tn! FREE 1991 CATALOG TEST/MEASUREMENT EQUSMEKT OOUPUTEH FRODUCIS COMPONENTS fim.3ED ELECTRONIC AE3EADCK, IMC ill SI 1 : IV -iVs'j PAX [JOS] 9W-S9M R-E SHOPPER CLASSIFIED DISTORTION ANALYZER measures 0.003% THD. 90db notch at 1kHz. Uses DMM (or readout. Built-in calibrator. Only nine ICs, Manual $4.00. Add $25.00 for PCB and silkscreened panel. Add $3.00 S&H for PCB panel. INSTRUMEX Box 490. Blue Bell, PA 19422. NI-CAD ZAPPER can rejuvenate those unre- chargeable NI-CAD batteries. For complete sche- matic and parts list to construct the NI-CAD Zapper, send $5.00 check or money order to: Tenlronix, 3605 Broken Arrow, Coeur d Alene, ID 83814. FM STEREO BROADCASTER kit. This kit outper- fomis the competition. Transmitter will broadcast any audio signal from a CD player, VCR, or cassette player to FM stereo radios throughout your home and yard. All the complex circuitry is in the unique BA1404 integrated circuit. Tunable across the FM band, runs on 1.5 to 12 volts DC. Complete kit of PC board and components for $22.00 postpaid. Tent- ronix, 3605 Broken Arrow, Coeur d 'Alene, ID 83614, DETER AUTO THEFT. 3 simple extremely hard to defeat diagrams, variations, time delays. $8.00 — $18.00 Radio Shack parts. Slops joyriding, child accidents, plans $5.00. Chory Electronics. 1285 Bart James Road, Elizabeth City, NC 27909. Infor- mation SASE. AUTOMATIC KILL SWrTCH with valet. Customized disarming. Plans and instructions only $9.95. Jess Lewis, PO Box 539. Dearborn Hgts, Ml 48127. SCRAMBLER PHONE: Demand ultimate privacy in your telephone conversations? Complete instruc- tions to build your own. Send $5.95. ABG Enter- prises, 27081S. Halifax, NS B3H-4M8. CABLE TV CABLE HACKERS BIBLE 275 pages covering all aspects of most cab! e systems. Schematics — fixes — theory. $34,95. TOCOM 5503/5507 "SUPER TEST CHIPS" — $29.95. JERROLD 400 manual — $14.95. Catalog — $3.00. CODS [602) 782-2316 TELECODE, Box6426-NV, Yuma, AZ 85366-6426. TV NOTCH FILTERS. BROCHURE $1.00 MICRO THinc. BOX 63/6025, MARGATE, FL 33063. (305) 752-9202. Z-TAC REPAIRS got you biting the bullet? Then let us help with a full line of Zenith replacement parts and complete repair facility, CALL 1 (800) TED- HEXS. RFI-TVI SOLUTIONSl "Interference Kit RFI-2'' Over $33.00 value, only $15,00 plus $2,50 shipping. Includes assortment of ferrlte tore ids, beads, and split beads for keeping interference out of TVs, ster- eos, computers, telephones, etc. Instructions In- cluded. Other kits and ferrlles available. Free brochure. Spi-Ro Manufacturing, Box 5500-B. Lakeland, FL 33807. (813) 646-7925. TOCOM VIP 5503/5507 'Super Test Chip" — $29.95. SA-6550 Test Chip" — $29.95. JERROLD 400 Service Manual — $12.95. CABLE HACKERS BIBLE — $34.95. Catalog — $3.00. COD'S (602) 782-2316. TELECODE, Box 6426-SH, Yuma, A2 85366-6426. COMPUTER HARDWARE IBM PC VIDEO DIGITIZER connects through the printer port, capturing up to 640 by 480 with 256 gray levels in 20 seconds. Includes software for CGA, EGA, and VGA. Grabs can export pictures for DTP. Only $89.98. More information send $3.00 for sample disk. COLOR BUR ST, PO Box 3091, Nashua, NH 03061, COMMODORE 64 Ham programs, 8 disk sides, over 200 amateur programs $16.95. 29 cent stamp gets unusual software catalog of utilities, games, adult and British disks. Home-Spun Software, Box 1064-R, Estero, FL 33928. PROGRAM THE 8051 microcontroller in Basic with this PC/compatible shareware collection. Disk con- tains Editor. Basic Compiler, Assembler, Dis- assembler, Procomm plus 3 surprise programs. Only $7.00 from Suncoast Technologies, TO Box 5835A. Spring Hill. FL 34606. VIRUSFREE SHAREWARE. 25 MEGABYTES $39.00, add $4Q.00;25MB increment up to 450 MEGABYTES. Include $3.00 shipping per 25MB: 1 (800) 876-8496, Visa-MC, SHARE-NET, POB 12368, Oklahoma City, OK 73157. 8051 TINY Basic interpreter. A program that resides in EPROM, allowing the programming of the 8051 microcontroller with simple Basic commands. Disk contains the Tiny Basic program, Editor, program converters, detailed Instructions and schematics. Only $10.00. Suncoast Technologies, PO Box 5S35A, Spring Hill, FL 34606. CREATE PROFESSIONAL printed circuit board designs with this IBM/compatible shareware pro- gram. Written for CGA equipped computers, this program produces quality layouts with a standard laser printer. Only $10.00. Suncoast Technologies, PO Box 5835A, Spring Hill, FL 34606. X-10 C-64. Together the most versatile, cost effec- tive, two-way home automation system. Includes TW523 interlace, software $69.95. Free info: Taurus Automation, 7423 Tacoma Ave., Tacoma, WA 98408. LEARN ELECTRONICS Why Spend thousands Of dollars on an electronic course when you can learn electronics on your MS DOS-PC compatible com- puter? We offer modern Computer Aided Instruction programs to help you achieve your goal. Lessons are shipped every other month until you complete the course. Each lesson costs only $29.95 plus $3.00 S&H. Order lesson one today and receive a FREE safety program. Specify disk size, Satisfac- tion guaranteed. EES-S02, POB 1391, Lubbock, TX, 79408. DESIGN CIRCUITS with our user friendly electronic engineering software. IBM and compatibles. Com- modore 64 and 128. Eleven different programs from $19, 95 to $24,95 each. Complete sets $197.50. Cat- alog $2.00. Visa/Mastercard. Order todayl WeaselGraphlcs, PO Box 647. Sun City, CA 92586-0647. Phone 1 (800) 356-8113. ATTENTION 8052 AH BASIC users. Newly de- veloped programming tool automatically converts standard musical notation (o2 MS A#8 P8} into PWM reload format. Add music to your programs with this 400 + note capacity IBM PC; compatible floppy. Just upload into memory to run computer tenerated; BASIC- 52 (tm) compatible program, 24.95 Suncoast Technologies, PO Box 5835, Spring Hill, FL 34606. BEST SHAREWARE CLUB. Receive 6 disks each month for $5.00 plus $2.00 S&H. CSS-S01, POB 1391, Lubbock, TX 79408. S .25 SOFTWARE. 100 PROGRAMS OF THE BEST GAMES, UTILITIES, DATABASE, WORD PROCESSING, AND MORE, Send $24,95 plus $3.00 SH to D.T.S., PO Box 34879, Houston, TX 77234-4879. UNIVERSAL MICROPROCESSOR SIMULATOR DEBUGGER 1.2 for PC. Simulates Z80 & 8085, 6800 & 6809, 6502 & 65C02, and 8051. Una as- sembler and disassembler. Debugging utilities. $55.00 each set. Call (201) 325-1892 for informa- tion. J&M Software Hardware Design, Inc., 83 Sea- man Road, VVes^range^NJ07052. COMPUTER SOFTWARE PC BOARD and schematic design software for the IBM PC/compatible. Create professional PCB layouts (with autorouting — requires EGA) and elec- tronic schematics (CGA) with these inexpensive shareware programs. Both for $7.00. SUNCOAST TECHNOLOGIES. PO Box 5835, Spring Hill, FL 34606. ElietHtruiiiEs. M®MS EfflJ ® Quality and Innovation NTERCONNECTION PRODUCTS DIVISION PACKAGED PRODUCTS 6PCV Series Terminal Blocks .375 CENTER-TO-CENTER PC PINS 6PCV SERIES #6-32 SC WIRE RANGE 1 2-22 AWG No. OF OVERALL LENGTH PACKAGED BULK TERM, STOCK QTYf POS. INCHES No. CARD PART No. 2 ss 46010 5 SKv-M J i la 46011 2 6PCV-0J 4 1 66 46012 2 6PCV04 5 1 84 46013 2 6PCV05 6 2 31 46014 2 6PCV06 7 2 69 46015 2 6PCV07 8 306 46016 2 Epcvog 9 344 46017 2 SPCV49 10 3 81 46019 2 6PCV10 11 4 19 6PCV.I1 12 416 6PGV12 13 f4»4 6PCV13 It 5 31 6PCV.14 15 si* 6PCV.15 16 £06 6PCV 16 17 £44 6PCV17 It £61 6PCV ig 6PCV 19 19 7 15 20 71$ 6PCV20 21 7(4 BULK 6PGV21 22 23 (31 3 69 ONLY 6PCV-22 6PCV2:! 24 906 6PCV24 25 944 9PCV-25 26 962 6PCV26 27 1019 6F>CV2? 2> 1057 6PCV2a 29 10S4 11 32 6PCV29 6PCV-30 30 Coaxial Cable Coaxial Cables BNC BOTH ENDS MOLDED IN RG-S8C, 59 B, 62A TYPE LENGTH ■ FEET OHM SULK PART No. sac 25 50 ccsac 2 5 58C S SO ccsac s sac 10 50 CCMCID sac 15 SO ccsac is sac 25 SO CCSaC 25 sac 50 so ccsac so sac 1M SO CGSBC-100 BSD 25 7S CCS9B-2S 59B 5 75 CC598S S9B 10 75 CC59B'10 590 15 75 CC59B-15 MO 25 7S CC59S.25 590 SO 75 CC59B-50 596 ICO •5 CCS9B1M 62* 25 •-.1 CC62A.2S 62* 5 93 CC62A-5 62* 10 93 CC62A10 62* 15 93 CC62A-IS 62* 25 93 CC62A2S 62* 50 93 CC62A-50 62* 100 93 cc62*-ioc AUGAT INTERCONNECTION PRODUCTS DIVISION PACKAGED PRODUCTS 33 Perry Ave, Attleboro, MA 02703 (508) 222-9635,9636 FAX (800) 284-2832 MTA Series Miniature Bat Toggle Green Series CorKicLi: Contact Rating: Contact Re t iitance : lobulation Reaittance: Dielectric Strcng tfi: Operating Temperature Actuator Marten at: Terminal Seal: GokJ Hash over silvsi 6A@125VAC 3A® 250 VAC 4A@2SVDC 20 murrSn 1000 Megohms min. 1500 V RMS at sea level -20*C to +B0-C (-4"F to 1 76-F) Nickel -plated brass Insert molded TOGGLE -.41" LONG WIRE LUG TERMINALS 1M-40- UNS-2A THREADED BUSHING .32" LONG A VERSIONS HAVE A .1" LONGER CASE () = MOMENTARY CONTACTS ACTION PACKAGED BUCK PART No. STOCK No. 01 Y CARD SPOT On-OH-On On-Nw»-[Oft| lOnl-OIHOnl On-OIHOn| 74001 74002 74010 74011 74012 UTA106D WTA106E UTA106F MTA106G MTA1Q6H DPDT Or. Hcrt»-0n OoOHOri Oft-noftMOnt (OeKNHQnl On-o*-iOn> 74003 74004 74013 74014 74015 UTA20S MTA206P MTA206P. MTA206S MTA205T SP3T On-On-On (OnlOrnOnl On-OfWOt 74016 74017 74011 UTA206PA MTA206SA MTA206TA 3PDT OnU^i On On-OH-On On.«Dn»-LOn» On Ott/Ont 740O5 74006 74019 74026 MTA306O MTA306E UTA306F UTA30GH 4PUT On-Kon* On On-OH-On 74O07 74001 MTA406N «TA406F> [ll'jl ■ ^ .'«*->■ )!-:■: UTA406PA Grid Array Sockets Pin Grid Array Sockets Open Irame insulator- molded plastic Low msflrlof. loree contacts Gold plaied 30 m* Non wcking. closed bottom Preasion-rnactiinrad m -plated sleeves Popular footprints shown o#low h hundreds available Also available in wo wrap versions - consult .aciory PC TERMINATION .125" TAIL No. OF POPULAR FOOTPRINT PACKAGED BULK STOCK QTY/ pins DEVICES No. CARD PART No. u WoteroU MC68000 15001 POM 069.1 41 006- V 114 Wol^oij MC68020 150O2 PGM114-IA1345-V 126 Uowci. UC69030 15003 PGM128-1A1359-V 179 Matcrola MC68040 15004 PGM 179- 1*1 81 4V U MottroUi D5P560O1 15005 PGUC*a-lA1373-V 66 InlM 90166 .90286 15006 PGM066-1A1132-V 132 mw 90396 ■ 5007 POM 1321*1 4 14-V 169 IM* 90496 15009 PGM1661A1715-V 175 Ndonal NS 32532 XLn« XL3090 15009 PGM175.1A1616-V PLCC Sockets PLCC Sockets Solder tail design allows through-hole board patterns on .10O"flfkJ Accepts JEDEC "A" type PLCC on ,050" centers and JEDEC FLCGsMO047AA AH (20-S4K MO-052AE {32 R«C) Porypfwny lone sulliOe insulator Phosphor hronzo contacts with Inland plaling Intornal standohs insurs proper posHioning Unrversal extraction available tor 20 thru 84 positjon PLCC devices, 2A rating, -55"C to *1 05"C UL recognised, IsleNo. Eti 1362 PCS SERIES • CHIP CARRIER SOCKETS 20-84 POSITIONS - SQUARE PACKAGES 32 POSITION - RECTANGULAR No. OF PACKAGED BULK STOCK QTY/ CONTACTS No. CARD PART No. 20 Sq 26100 pcs^oeoA-i 26 Sq 26101 PC302iA.1 32 Had 29102 pc&oasA-i 44 Sq 26103 PCS-044A-I 52 Sq 26104 PC&052A.1 66 Sq 26105 PCS .068**1 94 Sq 29106 PCS-OMA-I 20 awu 64 Eataciori Tod 29107 TK9136-2W94PCS SOCKETS 500 Series Wire Wrap PC TERMINATION MACHINED TIN-PLATED OUTER SLEEVE GOLD-PLATED STAMPED INNER CONTACT 10 MIL Ho. OF PACKAGED BULK STOCK QTY> STOCK OTYi CONTACTS No. CARD No. CARD PART No. t 3> ! 27001 2 27002 10 MSAGIID-ESL X3K1 27003 2 27004 10 506-AGHO-eSL 1*3X1 27005 2 27006 10 514-AGI1DESL 1&3X1 27007 2 270O9 10 S16-AG11D-FSI. IS' 3X 1 27009 2 27010 6 518-AG11DESL 20 3X1 27011 2 27012 6 520-AG11D-ESL 22.' 4X1 27013 2 27014 6 522-AG11D ESL 2* 4X1 2701 S 2 27016 ■ 524AG660 ESL 24/ 6X1 27017 2 27014 6 524AGHD ESL 2fr 6X1 27019 2 628.AC.110ESI. 32' 6X1 27020 2 5J2-AG110-ESL 36.' 6X1 27021 2 536AG11D ESL 40 6X 1 27022 2 540AG11D-ESL WIRE WRAP 3-LEVEL TERMINATION MACHINED TIN-PLATED OUTER SLEEVE GOLD PLATED STAMPED INNER CONTACT 10 MIL NOTE: For 2-L»v»l Win Wrap, add -2 •tier lh« "F' (•g. S16-AG11F-2-ESL) No. OF CONTACTS 'ACKAGED BULK PART No. STOCK Ho. QTY< CARD 3TOG* NO. QTY« CARD 6*3X1 a- ax i 1413X1 16 ]X 1 26001 26003 26005 26007 2 2 2 2 26002 26O04 26006 26008 6 6 6 6 506-ACl 1 F-ESL 509.AG11FESL 514.AG11F-ESL 516AG11F-ESL 1 & JK.1 20/ 3X 1 22/ 4X 1 24- 4X 1 24/ SX 1 26011 26013 26015 26017 2 2 2 2 2 26010 26012 26014 26016 26018 6 6 6 a 6 518-AG1IF-ESI S20AG11F-ESL 522-AG11F.ESL S24AG46F.ESL S24.AG11F-ESL 29/ 6X t 32/ 6X t 36' 6X 1 40 6X 1 26019 260SO 26021 26022 2 2 2 2 S28AG11FESL 532.AG1 1 F.ESL 536'AGHF'ESL 540-AG11F-ESL CIRCLE 273 ON FREE INFORMATION CARD CD m x (D <0 54CA HEAR THE TONES...SEE THE NUMBERS/ TOUCH-TONE DECODER/DISPLAY AND ASCII CONVERSION BOARD ^□[XP' 5EH3E •EIGHT DIGIT DISPLAY •32 CHARACTER BUFFER •ASCR SERIAL OUTPUT Model TDD-H riccodn and dt*pUy« all 16 DTMK ditfiln And providmi nn ASCII Wnnl outpul. fhnjim nrfdupJiypd dti fiifhl LKE'V* Il^chn.me'Lpr nwmnry can be scnullrd, ll will .iccrpl Almotjt jitiv Rudic »ourc* iuch 4k a Uirpc rwjrdfr. lelcptionc nnawcrinjl mnthiiW, ■C&irACr, Kc; Perfect for rrmuti- compul^r data tntiy unnjf ii telephone k«yp*d. -Scriul output can be connected to ytmr eampulti* IBM ctmpAtibl«»ft.iwa re included for displays iijj, itorintfprinUtifftinw. d-ntennd number for lutcrruitie logging. Ideal for •atomatlrjilly Jof ginx your nuto-patob traffic! TDD-H DTMF DECODER/DISPLAY ASCII S99.0U CAB-1 AUDIO & COMPUTER CABLES S20.00 PS-13 1 10VAC TO 12VDC POWER PACK *10.00 add $5 S/H - VISA/MC ACCEPTED TEL: 800-338-9058 503-687-2118 MoTron Electronic* 310 Garfield SL. M Eugene, OR 97402 FAX: 503-687-2492 (Tnuh-Tm ii ■ tndmurk rfATAVTi 3 Tunable NotCh Filters and Telephone Recording Equipment J Eliminates.^ • Beeping and Buzzing • Severe Interference „ Micro Thine, I P.O. Box 63-6025 J Margate, FJ 33063 as low as $16 each i of lOorirtoro Brochure $1 Assembled and Tested Filter* ? ! Kit Fillers as low as $8 each t of 21 or ism (305)-752-9202 ffJSfSSSSSJJfSSjrSfSSJ>SfSJSSrSSSSSSSffSSSSjrjfSSSSJ BMR-10 Speaker Kit S82.95 8MR-20 Amplifier Kit S99.95 BMR 30 Subwtxfe Kit $82 .95 Developed by Roikfard Corporalton Made In USA IdtrulieiKl t OrjorwinJiflrw/ Piinjunrj Available *"S" Jo anier raff toll litt ^Kfc 1 -800-366-2349 «t. 3010 or jemf thecb or money order: Racktard Corporation Educolional Service! 613 S. Rmtford Drive Trap*, AHieno 3528) IndiMl* SIM per un> ^Juppino t ttandfaf Try the bulletin board system (RE-BBS) 516-293-2283 The mere you use it the more useful It becomes. we support 300 and 1200 baud operation. Parameters: 8N1 (8 dala bits, tie parity, 1 slop tilt) or 7Ei (7 data bits, even parity, 1 stop bit). Add yourself to our user Diet to Increase your access. Communicate with other R-E readers. Leave your comments on R-E with the SYSCP. R-E 5HDPPER CLASSIFIED MISCELLANEOUS ELECTRONICS WANTED QUASAR VR10O0 VCR parts or whole units. Bay's TV Service. (304) 744-8431, ask for Steve. — Luxor 9534, 9539, 9540. 9550 — Birdview 20/20 — Toshiba TRX-100 — Toki TR-100 — STS MBS- LSR — Chaparral Cheyenne. $34.95. Catalog — $3.00. CODS (602) 782-2316. TELECQDE, Box 6426-NV, Yuma, AZ 85366-6426. BUSINESS OPPORTUNITIES EASY WORK! Excellent pay! Assemble products at home. Call for information. (504) 641-8003 axt. 11068. SATELLITE EQUIPMENT SATELLITE HACKERS BIBLE. Covering: Satellite data communications— RTTY — SCPC — WEFAX — Russian satellite television demodulator plans — frequency listings — schematics for: RTTY/CWV FAX demodulators — BMAC receiver — stock mar- ket quote receivers — SuperGuide. Includes 144 IBM-PC software files. $53.45 CODs (602) 782-2316 TELECODE, Box 6426-NV. Yuma, AZ 85366-6426. SATELLITE RECEIVER SCHEMATICS VOL. 1, A collection of satellite receiver schematics: Amptica - Macom T-1 — DX DSB-600 — UnkJen UST-1000 REPAIRS-SERVICES EDUCATION VCR TUNE UR VHS video shows you cleaning and belt replacement. Send $19.95 to How To Video, PO Box 19474, Baltimore, MP 21206. HEATH/HEATH KIT I can repair your audio, instru- ments, general and weather products no longer ser- viced by Heath. Factory trained: CALL (219) 287-9373, FAST SERVICE by EX-NAVY ET assemble/sokJer- ing PCBfc, cable/connector fabrication, sonar radar specialization. S&H, 41746 Gilwood Court, Te- mecula, CA 92591. GET YOUR "FCC Commercial General Radi- otelephone License." Electronics home study. Fast, inexpensive! Free details. Command Produc- tions, D-225, Box 2824, San Francisco, CA 94126-2824. FCC GENERAL RADIOTELEPHONE LICENSE! The easy way with these short cuts and latest Q & A material. Don't study more than necessary. Radar endorsement included! $25.00 postpaid. SMI. Box 5500. Lakeland, FL 33607. to O O m _l LU Q Q If there's a pain in your chest, be a pain in the neck. Complain to a doctor. Chest pain could be a sign of heart disease. The sooner you see your doctor, the better your chances for life, ^American Heart Association 54CB STAnTEIx INTERNATIONAL, INC. I 1-1500 MHZ I 8 DIGITS 2 GATE TIMES ALUMINUM CABINET AC • DC • BATTERY FULL YEAR WARRANTY soiutely (he best values In the frequency counter industry. Choose ler the STARTED Model 1500A or the 1500HS for finding and inting RF frequencies from 1 to 1500 MHZ (1 .5 GHZ). The 1500HS he same size and has the same features as the 1500 A but in lition contains Monolithic Microwave Integrated Circuit, Low ise Amplifiers which provide an "ULTRA HIGH SENSITIVITY" nal input. The 1500A can be purchased without the custom Nl- D batteries and AC adaptor, the 1500HS is priced complete. Both inters can be powered by 9-12 VDC, an AC adaptor or internal CAD batteries. The excellent HF to F sensitivity of these instruments kes them ideally suited for use with antenna to find and display transmit luencies from handheld, fixed and bile radios such as: police, ham, veillance, phone, marine, aircraft, etc. sy can be used with the model #DC- Probe to measure computer clocks, :illators, etc. TYPICAL INPUT SENSITIVITY IN MILLIVOLTS RMS MADE IN USA A a 1.5 GH2 HIGH SENSITIVITY RF COUNTER isoaoooo 1.5 GHZ COUNTER isaaaoao ■-■-■ ■QUENCY -600 MHZ 150 MHZ S00 MHZ 1.3 GHZ 1500 A 5-30 mV 8mV 50 mV 250 mV 1500HS <1. mV .5 mV 3 mV 15 mV 0QA 1-1500 MHZ Frequency Counter Only $99.95 M5 Custom Interna! NI-CAD Pack (Installed) 20.00 MS 110 VAC to 9 VDC Adaptor/Charger 9.00 #1500A/C Counter Including NI-CAD Pack & AC ADP 128.95 #1 500HS H I -SENS Counter I nc. NI-CAD Pack and AC ADP. ...1 69.00 #TA-90 Telescoping BNC Antenna, General Usage 12.00 #DC-10 Probe. 50 OHM, 1X, 3 Ft. Cable .....20.00 MODEL DT-90 DRAM TESTER The DT-90 is a new, compact memory IC tester that can READ/WRITE FUNCTION TEST, VOLTAGE TEST and MEASURE THE SPEED of 1 MEG x 1, 256K x 1 and 64K x 1 Dynamic RAMS. LED indicators show 3 Vcc TEST VOLTAGES and a RED/GREEN LED flashes when test is running then indicates PASS or FAIL. A switch is provided to continuously cycte a test if desired. The DT-90 is housed in a rugged aluminum cabinet 3,4" W x 3.8" H x 1" D. Two ZIF TEST SOCKETS are provided for the IC under test. The unit is powered by a 110 VAC to 9 VDC @ 300 mA adaptor which is included. The DT-90 is sold in KIT FORM with complete assembty instructions or FACTORY ASSEMBLED, calibrated and tested. MODEL DT-90-CK $89 95 fL MODEL DT-90 iM:, tii ,„ guaranteed rEST PRMBFS. IN" ( all toll &« I u guide and attains 1 80Q. V.X 5719 DFllXFTF.STLEAnKIT Users call TPI leads The Absolute Rest. The TLS?!«hi features the highest quality cable in the industry with spnne loaded safely sleewl plugs i [ listed(fifcE7958U Kil S30Leads and probes onii $19 Satisfaction guaranteed. TEST PROBFS, INC. Call mil free for cata- log i 800- 368 «!7io The World's Most Popular Probe Model SP1 m $ /iE 100 MH? Swiichable Ix-lOx ,J\j More SPlOft Probes Have Been Sold Worldwide Than Anv Other Probe Ever Made ForTektromx, Hewlett Pai kard. Philips leader R&K. Kikusui, Huai b R,') kman m.i ither oscilloscopes Immediate delivery fmm distributor stink Fconomical Substantial savings compared to OEM probes Dura hie I 'mque cable is slim, very flexible and resists hrentage l rt d;»\ retum polu v Guaranteed performance and quahty Free cross reference chart for all makes of scopes and probes. Call toll-free for i hart and name of your local distribu- tor. PROBES, INC. TPli 1 78 Brown Deer Road San Diego. V\ 02121 Toll Frw 1-800-368-5719 CIRCLE 266 ON FREF INFORMATION CAHD CO m s 54GE USE R-E SHOPPER CLASSIFIEDS READ BY MORE THAN 100,000 ELECTRONICS BUYERS AND SELLERS AND TRADERS INSTRUCTION FOR PLACING YOUR AD! HOW TO WRITE YOUR AD TYPE or PRINT your classified ad copy CLEARLY (not in all capitals) using the form below, if you wish to place more than one ad, use a separate sheet for the additional ads (a photocopy of this form works well). Choose a category from the list below and write that category number into the space at the top of the order form. If you do not specify a category, we will place your ad under Miscellaneous or whatever section we deem most appropriate. We cannot bill for classified ads. Payment in full must accompany your order. We do permit repeat ad or multiple ads in the same issue, but in all cases, full payment must accompany your order. WHAT WE DO The first two words of each ad are set in bold caps at no extra charge. No special positioning, centering, dots, extra space, etc. can be accommodated. RATES Our classified ad rate is 40c per word. Minimum charge is $6.00 per ad per insertion (15 words). Any words that you want set in bold or caps are 10c each extra. Bold caps are 20c each extra. Indicate bold words by underlining. Words normally written in all caps and accepted abbreviations are not charged as all-caps words. State abbreviations must be Post Office 2-letter abbrevia- tion s. A phone number is one word. COHTEHT All classified advertising in the R-E Shopper is limited to elec- tronics items only. All ads are subject to the publisher's approval. We reserve the right to reject or edit all ads. DEADLINES Ads received by our closing date will run in the next issue. For example, ads received by April 5 will appear in the July, 1991 issue that is on sale June 4. Shopper ads will appear Jan., Mar., May etc. No cancellations permitted after the closing date. No copy changes can be made after we have typeset your ad, NO REFUNDS, advertising credit only. No phone orders. AD RATES: 40c Der word. Minimum S6.00. Send your ads with payment to: Radio-Electronics SHOPPER, 500-B Si-County Blvd. Farmingdale, NY 11735 CATEGORIES 100 — Antique Electronics 270 — Computer Equipment Wanted 450 — Ham Gear Wanted 630 — Repairs-Services 130 — Audio-Video-Lasers 300 — Computer Hardware 480 — Miscellaneous Electronics For Sale 660 — Satellite Equipment 160 — Business Opportunities 330 — Computer Software 510 — Miscellaneous Electronics Wanted 690 — Security 190 — Cable TV 360 — Education 540 — Music & Accessories 710 — Telephone 210 — CB-Scanners 390 — FAX 570 — Plans-Kits-Schematics 720 — Test Equipment 240 — Components 420 — Ham Gear For Sale 600 — Publications CLASSIFIED AD COPY ORDER FORM Ad No. 1— Place this ad in Category # 1-S6.00 2 - $6.00 3 - $6.00 4 - $6.00 29 -$11.60 30 -$12.00 31 - $12.40 32 - $12.80 5 -$6.00 6 - $6.00 7 - $6.00 8 -$6.00 33 - $13,20 34 - $13.60 35 - $14.00 36 - $14.40 9 -$6.00 10 - $6.00 11 - $6.00 12 - $6.00 37 $14.80 38 -$15.20 39 - $15.60 40 $16.00 13 - $6,00 21 - $8.40 14 - $6.00 15 - $6.00 16 - $6.40 22 - $8.80 23 - $9.20 17 - $6.80 16 - $7.20 19 - $7.60 20 - $8.00 24 - $9.60 25 -$10.00 26 -$10.40 27 -$10.80 28 -$11.20 Z Total classified ad Payment $ enclosed. | O [ 1 Check [ ] MasterCharge [ ] Visa ($15.00 minimum credit "j card order) UJ O Name Q g Address Ad No 1 — Total words All Caps words . Bold words Bold Cap words . .x. 40 per word = $ . .x .10 per word = $ . _x .10 per word =$ . _x,20 per word = $ . TOTAL COST OF AD No. 1 $ Card # . Expiration Date I . Signature . Phone . . City State Zip . 54CF WE HAVE GREAT CONNECTIONS #TE-521 5 Outlet Modular Jack Assembly 'icBSH $3,00. [Waif ) #SPL-29 DB25/FtoDB9/M Mouse Adapter #SPL-31 MM6/MtoDB Q /M PS/2 Serial Adapter I $2.00 ®anD^ ]i #TM-476 1,000 Ohm/V Multi Tester Complete with test leads and instructions. $5.00 ea Any Quantity Bulk Ribbon Tape For IDE 40 Conductor 20CFoot ioo $15.00 For Crimp-on IDC Connector Make your own Drive Printer, Serial Cables, etc. #ec-iooi 100 foot RS-232 cable assembly, shielded 25 pin M/F. Gold plated pins. Fully shield- ed to stand shocks and misuse. Metal hoods $30 4 up $25 oa #CC-737 Adapter for: •Mac 512 to Mac Plus or better. • Mac 512 to Apple IIGS. E a« $1.50 20 up $1 ea #VA-154 Copyguarc! Corrector Enjoy Videotape* Without Flashing light & Dark, Tearing Macrovision methods often make it impossible to enjoy a clear, stable picture from prerecorded video cassettes. Picture roll, jitter, snow, tearing and flashing are the annoying side effects cured by the Copyguard Corrector. Sophisticated digital circuitry inside this compact unit ( no larger than two 8mm tapes! ), descrambles any copy- protection scheme and delivers a stable, whistle- dean signal. Connects easily between two VCR's, or your VCR and a video monitor, with its single video in" and video out" jacks. Recently, copy protection developers have successfully sued to keep descramblers such as the Copyguard Corrector off the market. We cannot predict for Row long this unit will be available, and suggest you order early to be safe! Reg. $69.00 Now $49.00 or 2/$90 Special! Unautfrnired duplication tJ Copy-righted Vidcotapea is pro^jbj ltd by Federal Copyright law I Plow Out 5peclals Part * Description Prk» SPL-10 Macintosh 512 Hayes Modem Cable 6* $1.00 SPL-11 DB25M/M Gender Changer $1.25 SPL-13 Centronjc F/F Gender Changer $2,00 SPL-1 4 Centronlc M/M Gender Changer $2.00 SPL-15 DB9 F/F Gender Changer $1.00 SPL-16 DBS M/M Gender Changer $1,00 SPL-1 7 M/M Null Modem Adapter $2.00 SP L-1 8 DB25 M/M Cable Assembled 6' / Grey $2.50 SPL-1 9 DB25 M/M Cable Assembled 15' / Grey $3.50 SPL-20 Centronlc M/M Cable Assembled 15' $3.00 SPL-21 DBS to DB25 AT Modem Cbl Asmbld 6' $2.50 SPL-22 Macintosh Adapter Cable 1 ' $1.00 SPL-23 DB15 M/F Extension Cable 2' $1.00 SPL-28 DB19 Apple/Macintosh Ext Floppy Cbl $4.00 SPL-29 DBS to DB25 Mouse Adaptor $2.00 SPL-31 Mini 6 Pin Male to DBS PS/2 Serial Adpt $2.00 #TM-319 DOUBLE DISK™ The original patented disk converter. HOW IS THIS POSSIBLE? Have you ever tried to format a regular, double density 3.5" disk to 1.44 MB? Of course you have. It doesn't work. The computer gives you an invalid media error. So there must be a difference in the disk media. Right? Wrong! Surprisingly, manufacturers find it less expensive to use THE SAME MAGNETIC MEDIA for both HD and DD disks, THE ONLY DIFFERENCE IS THE EXTRA SENSE HOLE IN THE HD CASE. That hole tells the drive to operate in high density mode. So, how can you take advantage of the fact that the media is the same? TWO YEARS OF TESTING. We've conducted an intensive testing program. We have converter over 159,800 disks and tested each one for data Integrity. In two years NOT ONE CONVERTED DISK HAS LOST ANY DATA! SUCCESS! The Double Disk Converter* is a true product success story. From the moment we put it on the market the order lines have been ringing non stop! Nearly every major corporation, school, university and government agency is now using the device. In fact, over one hundred thousand satisfied purchasers are converting millions of disks and SAVING SERIOUS MONEY with the Double Disk Converter™. STILL THE BEST Made of heavy gauge, deep drawn steel! For all IBM /dories and Mac- intosh systems! Don't trust your data with anything less than The Original Double Disk Converter™! $26.95 4 up $25 ea #AD-540 BNC T Adapter Mil #UL-274/AU 2 Fern, to 1 Male id up $ 1.50 m #CN-547 BNC crimp type conn. 3 piece. For RG-62 Areenet or RC-59 video 75c 20 up 65c ea twist-on same price DB9 or DB25 Hoods Grey plastic w/hard ware I00up-DB9 8Cea 100up-DB25l5Cea #CC-PR6 6 foot IBM/Clone parallel printer cable. Assembly type. $3.00 ea 10up$2.50ea *< ROGER'S SPECIALIST 27712 PinehiHs Avenue, Santa Clarita CA, 91351 G&> Credit card customers can order 24 hours a day 7 days a week by FAX. £*??& 0> Voice or FAX k 805*251*2520 Voice or FAX 800*365*0579 ^SSk Voice 805*251*3085 c e m m #* CIRCLE 276 ON FREE INFORMATION CARD 54CG A Complete Electronics SUPERMARKET! Super VGA {SVGA) 14" Color Monitor NEW! $349.00 1024 x 768 NON-interlaced * 28mm dot pitch * IBM Compatible * 65 MHz bandwidth * New * 1 Year Warranty + IBM Keyboard (IBM P/N 645-0200) $49.95 Genuine IBM * Tactile touch! * 84 key * 5 pin Din * AT 286 & 386 Compatible * 84 Key Keyboard $19.95 AT/XT Compatible * Autosense * NEW * 8087-2 Math Co-Processor $55.00 8 Mhz * XT Turbo Compatible * NEW in O.E.M box * Tape Back Up Drive (Cipher Model #540) $149.94 40/50 MB * 5 1 A" FH * w/controller * uses DC-300or DC-600 tapes * New * EGA Card $39.95 XT, AT & 386 Compatible * w/composite output * w/manual * 16 Bit 286/386 Floppy/Hard Controller (order #R/AFH) $49.95 Supports 2 FDD's & 2 HDD's * 360kb to 1.44Mb FDD + AT Compatible * supports MFM Hard Drives * w/cables & manuals * 8 Bit I/O Interface Card (order #R/IO) $29.95 XT Compatible * PIO * SIO * Com 1-4 * 2nd SIO opt. * Clock/Calendar * 0-384K Multifunction Card (order #R/MF) $29.95 XT Compatible * 384K opt, OK installed * PIO * SIO * Game Port * Clock/ Calendar * 2nd SIO opt. * Monochrome Graphics Multt I/O (order #R/MGMIO) $39.95 XT Compatible * Hercules Compatible * Supports 2 360K FDD's • Game Port * PIO * SIO * Clock/Calendar * 2nd SIO opt. + Multi I/O and Floppy Controller (order #R/MIO) $29.95 XT Compatible * Supports 2 360K FDD's + PIO * SIO * Game Port * 2nd SIO opt. * Clock/Calendar * Eprom Programmer-Ten Gang (order #R/EPROM-10) SALE! $149.95 w/Software * IBM Compatible * 2716 to 27512 * IDE Hard Drive Controllers with High Density Floppy controller New 1 Yr. $24.95 With SIO/PIO ports New 1 Yr. $24.95 20 MB Hard Disk Drive {order #R/ST-225) $129.95 Seagate ST-225 * 20 MB * MFM + 5.25" H.H. * Refurb * 1 Yr Warranty * 20 MB Hard Disk Drive Order #R/ST-125) $139.95 Seagate ST-125 * 20 MB + MFM * 3.5" * Refurb * 1 Yr Warranty * 1 laltek Electronics is a 15,000 sq.ft. retail store in the heart of silicon valley. We offer one of the most diversified selections of high-tech goods from the oldest to state of the art. We are exceptionally strong with computer products, ICs passive components, electro mechanical, optics, wire & cable and probably one of the biggest inventories of Lambda power supplies around. We do not have a catalog or a product listing, due to the ever changing supply So give us a call and we will be happy to check stock for any and all your electronics needs, HALTEK ELECTRONICS 54CH 1062 LINDA VISTA AVENUE * MOUNTAIN VIEW, CA 94043 » 408-744-1333/415-969-0510 CIRCLE 224 ON FREE INFORMATION CARD A Complete Electronics SUPERMARKET! 80 MB S.C.S.I. Hard Disk Drive (order #R/ST-296N) , $295.00 Seagate ST-296N * 80 MB * S.C.S.I. * 5.25" H.H. * Refurb * 1 Yr Warranty * Hard Disk Cable Set (IDS34 x IDE34 x IDE34) $2.95 Extra 20 pin data cable $1.49 Visible Laser Diode $49.95 Toshiba TOLD 9211 * w/docs * 670nm * Pulls * . $14.95 $200.00 . $79.95 Helium Neon Laser Tube Approx. 1-2 mW * w/mount & connector * w/o power supply * 12" Digital Calipers NEW! Mitutoyo CD-12' * \nJmm * Data Hotd * data output * wood carrying case * Mini HeNe Laser System Tube & Power Supply 12VDC input * Great for low recoil rifle sights * portable applications * 100,000 uF 5.5v Electrolytic Capacitor , $1.49 Lens/Mirror Unit $4.95 Fuji Optical * 190mm lens * 1%" front surface mirror * F1.5 + S.C.S.I. Cable $9.95 DB25 male to 50 pin Blue Ribbon male * 3' * NEW * Fiber Optic Rod 4.1" x 1.1" * Fused GSass Strands w/polished ends * w/QA Spec sheet * Aluminum Housing 3" x 6.5" * 1 to 1 coherent image * Amazing Optical Quality! * 5 Volt Power Supply Lambda #LYS-K-5-OV * 70 Amps * NEW * w/manual * 12 Volt Power Supply Lambda #LM-B-12 * 3 Amps * with O.V $39.95 S195.0G $39.95 P.* Microcontroller Kit INTEL 8052 * Basic Interpreter * Console I/O * serial port * 24 I/O lines * 3 Expansion slots * on Board Eprorri Programmer 8/1 6K + Kit includes Etched PC Board, all parts, instructions * Word Processing Software . w/Mailmerge * Brand New w/book * Hand Held IC Tester Tests TTL 74, CMOS 40/45 DRAM 4164-411000, 4416-44256 * 3.5"W x 7"L x 2"H * 9VDC battery or adapter (incl.) * Identifiers unknown TTL 74 and CMOS 40/45 * Auto power down * New * compare Price anywhere! * Keyboard Adapter PS/2 to Standard AT AT/5 pin DIN to PS/2 Microdin * use your AT Keyboard on a PS/2 * $249.00 $19.95 $185.00 $3.50 ■'•ABOUT (tUn R i I l R H 'i ■ ■ ■ Out Jf/uibislw*) hivrnlory contains items th.it fall into one or murciif the following cnlaeories; I) failed nrtniaty testing,?) wassitld and telimied as frtiletl, .1) cnsniHitalty imperfect, fn any case, I he ilem wai relumed tn I he O.K M. (original etiuipmriil manufacturer) and was ( i- L'tirtH ioned or fined let original manufacturer* spe* if ica lit >nv \ IAITF.K guarantees all refurbished pntdttcts for 40 day* from I he date of piinthasr Any item may he whanged within that pel rod The management of Hatrek FSrctnjnics rrr|ttires lhal any returns he in the onginal parkaging aihI he complete, including any and all manuals, cables, software, etc. and must he acrompnnied by the original sales receir*. Prices subject to c hange without notice • Quantities limited to slock on hand • All items ar* refurbished nnle*s indkll?d as "new" BR$*U15>%9-6ttl HALTEK ELECTRON C S I0f>2 LINDA VISTA AVENUE • MOUNTAIN VIEW, C A 94043 * 408-744-1333 / 415-969-0510 ? m m 8 CIRCLE 224 ON FREE INFORMATION CARD 54CI 13406 Saticoy Street North Hollywood. CA 91605-3475 CORP. (Call for free catalog.) [MoitttGovvl] TEK MODEL 7603N Oscilloscope: Mil SpccAN/USM-281C. 8 x 10 CM display, NX) mHz response which ac- cepts standard 7000 series PJug-lns, Vertical Plug-In: 2 ea. 7A15 IAM-6565), frequency BW75 mHz, maximum sensitivity SmWDIV, Horizontal Plug. In: 1 ea. 7B53 (TD-108S), triggering to 100 mHz, minimum, sweep- time 50 NS/DIV, has delayed sweep capacity. Price: $595.00 TS-723A/U Spectrum Analyzer: Frequency range 20 Hz ro 20 KHz. Fundamental frequency rejection, -90 dB. In here nt distortion <0.1%, sensitivity 0.3.% full-scalt- Useable to 0.1%. Input impedance 200K ohms 40 pf, Meter frame 0-3 to 300 volts fullscale. VTVM fre- quency range 10 Hi to 100 kHz + 3% Harness. VTVM input impedance 1M ohm, 3M ohm, 1AM ohm, 37" pfs dependent on range selected. Noise measurement — full stale. 300 microvolts, mini- mum — 75dBm, Irequency— 10 Hz lo 20 KHz. Power Supply— I1WB30V, 50 to 100 Hz, 90 wilts. Price: $150.00 L.R. TANK PERISCOPE TypeM~24. Rugged military construe- lion. Contains two independent in- frared image con- verter tubes plus correction lenses, prisms, and eyepieces. The binocular view- ing system is directly connected to a prism- type periscope. The image tubes have dy- namic focus provided by a built-in adj tilla- ble voltage dEvider. This unit requires TO to 15 KV ai low current for operation. Unable to supply power supply. (Dimensions: tS" high k 9" wide x 4W" thick. Weight 17 IbsJ Stock #OP 9001 Price: $200.00 (8181 787-3334 HEWL1TT PACKARD MODEL 606A SIGNAL GENERATOR Signal Generator: Freq. 50kHz to 65 mHz in 6 bands * 1%, freq, call 100kHz and! mHz, RF output (1.1 uV to 1.0V at 50 ohms ± IdFJ over freq- range, output VWXR — 10 DBC leverage 0.10V, modulation to 100% + 0.5DB over Freq, range. Internal: 400 Hz/1000Hz-5%; External: DC to KHz. Power "V!»V, 50 to 1000 Hz, 135 watts. Size: 20W" X XLW (H) X 14W (LI. Wt. 46 lbs. Price: S2S0.O0 HYPERION POWER SUPPLY MODEL HY T1-36-30C Solid state output 0-36 VDC. 0-30 amps. Input 115 vac 55 to 60 cps. Cufrcni limit adjustable. Dual meters to monitor voltage and current strapped connections In back to allow remote control. Price: $29S.0O A.C. POWER SUPPLY STAC0 MODEL EtfflOVA Price: Sf65 This unit has been designed and con- structed (or rigorous industrial, classroom or laboratory applications. These power supplies are brand new. Current list price $750.00. Specifications: Input: 120 VAC 50/60 HZ. Output: 0-120 VAC 10 amps. In- cludes manual with schematics. Features: Ammeter, voltmeter, convenience outlet, power indicator and circuit breaker. Dimen- sion: 10" x 15- X 6". Weight: 22 lbs. Price: $250.00 AN/USM 44C Signal Generator: General purpose, solid state, high frequency generator which pro- vides radio Frequency (rf) signals used to test, evaluate and align radio receivers, rf equipment and amplifier. Direct replace- ment for HP 60S series. Frequency: 10 MHz to 480 MHz ± 0.5% in 6 bands. Modulation : Internal AM: 400 and 1000 Hz +10%, to 95% with 0.5 volt RF output. External AM: to 95% , 0.S volt output, 1.0 volt RMS input w 20 to 200 KHz. Pulse Modulation: 40 to 200 MHz, 4 usee, 220 to 480 MHz, 1000 Hz. Spu- rious: 35 dBc, =.500 MHz. Output: 0.1 mi- crovolt to 1,0 volt continuous + 1 dfl over frequency range. Leveled Output: ±1 dB (one adjustment, 10 to 215 MHz, +1dB,two adjustments, 215 to 480 MHz). Power: 115/230 volts AC, 50 to 400 Hz, 1S0 watts. HEWLETT PACKARD 8640B-OPT 323 SOLID STATE SIGNAL GENERATOR Iw/Q synchronizer) Frequency range: 450 KHz to 512 MHz, to 1100 Mhz with external frequency doubler option (not supplied). Ten Frequency bands in octave increments from 500 KHz; band 11 for doubler use. Ac- curacy: 6 digit LED read out. Stability: <: 1000 ppm. Output power: — 145dBmto +10 dBm (0.013 V to 2 V) into 50 H. Level flatness is < +0,5 dB from 0.5 to 512 MHz. Imped- ance Is SO (1, VSWR < 2.0 on 2 V and 1 V range < 1.3 on olher ranges >. Spectral Purity: Harmonics at 1 Voulpt > 35 dB be- low fundamental of 0.5 (o 128 Mhz; > 30 dB below fundamental of 128 to 512 MHz. Mod- ulation; Internal AM, FM and PM, external AM, FM, and PM. Pulse frequency: 0.05 to 5 KHz, General: Power Requirements: 100, 120, 220. 240 V, 48 hz to 420 hz, 2 amps. Note: OPT 323 built to military specifica- tions. Ruggedized performance for better operation under severe environment. Size: 6" (HI X 19<" (W> x 13M- (D). Wt. 60 lbs. Includes ruggedized case and manual- Price: $1,250,00 Currenl Hewlett Packard Price $12,05000 (800) 235-6222 FAX (818) 787-4732 90 Day Unconditional Guarantee 54 CJ CIRCLE 283 ON FREE INFORMATION CARD THIS IS THE SOLDER side of the PC board. range. Alternately tune T3 and T4 for a maximum voltage, which will vary between 1 and 2 volts. If you don't have a frequency counter or DMM available, you can tune the stethoscope while listening to your heart. With the transducer and headphones con- nected to the circuit board, put a little mineral oil or ultrasound gel on the face of the transducer and place the transducer firmly on your chest near your heart. Try to place the transducer between a pair of ribs rather than directly over a rib. Turn the volume up until you hear some Doppler sounds, which will probably be low, as well as a hissing noise. Alternately tune T1-T4, starting with T3 and T4, to increase the volume and reduce the hissing. Turn down the volume control during this tuning to prevent overloading and distortion. If you don't hear any sounds with the above procedure, put a few drops of water on the trans- ducer face and rub it with your finger. If that doesn't produce any sounds, check the circuit board for solder bridges and cold solder joints. Testing and use As mentioned earlier, max- imum sensitivity is obtained when there is a good impedance match between the transducer face and the skin, with no air is trapped between them. A liquid- gel such as Aquasonic is specifi- cally made for that purpose and is available at medical supply stores. Apply a small amount of liquid gel to the transducer surface and place the transducer firmly against the bare chest, several inches to the left of the center and about 10 inches below the shoulder. Place the transducer so the ultrasonic beam passes be- tween two ribs for best transmis- sion. You will hear the sounds associated with the movement of the heart. Keeping the trans- ducer firmly against the chest and changing the direction of the ultrasonic beam you will hear dif- ferent sounds depending on what surfaces are in the path of the beam. When you take a deep breath the sounds may disappear because the lungs fill with air, covering a portion of the heart. As previously noted, air is a poor conductor of high-frequency sound. There are many aspects of heart action. First, returning blood from the venous system fills the right atrium. A valve con- necting this atrium to the right ventricle then opens and con- traction of the atrium forces the blood into the ventricle. The valve then closes and another valve connecting the ventricle to the pulmonary artery opens. The right ventricle contracts, forcing blood into the pulmonary system to return carbon dioxide to the lungs to be exhaled and to pick up oxygen from the air we breathe in. The blood then re- turns to the left atrium where it is pumped into the left ventricle through another valve. Finally the left ventricle contracts. pumping blood into the arterial system to feed the body and the heart itself. Each of the four chambers of the heart contract and relax at different times of the heart cycle. Their associated valves open and close synchronously. The move- ment of all those structures and the movement of blood through them provide the Doppler sounds which you hear with the Doppler ultrasonic stethoscope. When you move the transducer across the skin you'll hear some scratching sounds. To avoid this, turn the volume down while you move the transducer. Because there is attenuation of the sound wave as it passes through the body, those with a heavy build may have to try alter- nate body positions to bring the heart closer to the chest wall. Two suggested positions are lying on the left side or leaning forward in a sitting position. When listening to the heart with Doppler ultrasound a number of different sounds are heard, one after the other, in rapid succession as the heart chambers and valves move and the blood flows through them. One can listen to blood flow sepa- rately from other sounds by plac- ing the transducer on the neck where you feel the pulsation of the carotid artery. Because the ar- tery is small compared to the heart, it will take some time to learn how to orient the trans- ducer in the direction of blood flow through the artery. You must use the gel for that experiment. You may be able to hear a slight change in blood flow correspond- ing to the dicrotic notch in the pulse wave. Blood flow sounds may also be heard from the brachial artery in the arm on the inside of the elbow. That is the location where the physician places the stethoscope when measuring blood pressure. The transducer is again oriented in the direction of blood flow and gel must be used. When listening to the blood flow in the brachial artery, you may want to try an experiment. z Clench your fist to stop the flow of o blood in the hand for about 5 or 6 g seconds. When the fist is un- m clenched the blood flows again 3 and you will hear some interest- - ing wind-like sounds. R-E S 57 o s h- u HI _) UJ 5 < IF YOU THOUGHT A MUSIC ON-HOLD feature for your telephone was only for high-budget profession- als, think again. We'll show you how you can add FM music on- hold to any analog telephone line with a Touch Tone telephone. It's ideal for home offices or for peo- ple who want to project a high- tech appearance. Some of the features of this de- sign include; LED status indica- tor, audio volume control, built- in antenna, only one operating adjustment, and a mute function to eliminate "hiss" in between stations. You can build this im- pressive device in under three hours, for only $70. Construction, test, and align- ment is made easy due to the use of specialized IC's, namely a sin- gle FM receiver chip, IC4, and a DTMF decoder, IC1. There are no special coils to wind, and no tricky circuit adjustments are re- quired. All you need is a DMM to test and align the circuit. Let's now take a look at how the unit works. On-hold circuit A block diagram of the unit is shown in Fig, 1, and the sche- matic in Fig. 2. The FM on-hold device connects to an analog tele- phone line via an RJ11 modular jack. It's powered by an external + 15-voltDC. 150-mA power pack that plugs into a standard 120- volt AC outlet. The 15-volt DC supply passes through polarity- protection diode Dll to the input ofIC5. a 7812 + 12.0-volt DC volt- age regulator. Capacitors C24 and C25 provide decoupling and anti-oscillation protection for the regulator. The regulated output of IC5 is fed to the input of IC6, a 78L05 voltage regulator, to pro- vide a 5-volt supply for IC4, a TDA7000 FM receiver. Decoup- ling and an ti -oscillation protec- tion for IC6 is provided by C26. Voltage divider R16-R1 7 provides the +6-voIts DC power-supply output, which is filtered by C28. When a key on any Touch Tone telephone is depressed, the sig- nal is passed through IC3-d, an LM324N balanced amplifier. The purpose of this amplifier is two- fold; it acts as a balanced to un- balanced matching network, and its gain is set to 0.1 to act' as a line-voltage attenuator. Capaci- tors CI and C2 block the phone line's 48 volts DC from enter- ing the ampli- fier. The ring- ing-voltage is limited by Rl and R2. The ratio of R3 to Rl sets the gain of IC3-dtoO.L Re- sistor R4 biases IC3-d between its supply volt- age and ground allowing, it to operate from the single +6.0 volts DC power- supply line. The output of the balance ampli- fier passes through coup- ling capacitor C3 and is then decoded by IC1, a Motorola MC145436 dual- tone multi-fre- quency (DTMF) decoder IC. The output of 1C1 is a 4-bit word, whose codes are listed in Table 1. It is connected to IC2- 6, a 4082 dual quad-input and gate, so that the output of that IC (pin 13) is normally low, and goes high only when the "*" key is pressed. Therefore, when the "*" key is decoded by IC1, pins 1, 2, and 13 are high while pin 14 is low. To switch the output of IC2-b high, four logic-high inputs must be present. The high in- puts are provided by IC1 pins 1, 2, and 13 and IC2-a pin 1. In order for IC2-a's output to go high, it must also have four logic- high inputs. Two of those are pro- vided by R7, D10, and C27. Those components ensure that the in- ternal power supply is operating. That will prevent the unit from seizing the phone line if power is lost or removed while it is con- nected to the phone line. The re- maining two inputs are provided by a logic high from 1C1 pin 12, which is the dv, or data valid, output pin. dv assures proper op- eration of IC1 by providing inter- nal checks. When those checks are valid, dv will output a logic high. That prevents false trigger- ing due to voice or other tones. such as music, that occur during normal telephone usage. When the "*" key is depressed, IC2-b pin 13 goes high, which in turn charges C4 and turns on switching transistor Ql. That ac- tivates relay RY1. Diode Dl pre- vents DC voltage from bleeding back into IC2-5 pin 13. The time- base oscillator for IC1 is formed from a 3.58-MHz crystal XTAL1 and R5. The normally open contacts of RY1 close and D7. R9. RY2, RIO, C5, LED1, transformer Tl (Sec), and the four diodes from the po- larity bridge (D3-D6) are con- nected across the telephone line and effectively "seize" it. That combination of components is referred 'to as the seizure net- work. The unit is now in a "standby" mode and LED1 lights dimly. If jumper Jl is in the IN position and a station is tuned in on the FM tuner, that station will be heard on the telephone line. If Jl is in the OUT position, the sta- tion will not be heard until the phone is hung up. RY1 will stay activated for ap- proximately four seconds. That 58 Impress your callers by adding an FM music on-hold feature to your telephone. delay is determined by the RC network of R6-C4. Diode D2 pre- vents relay-coil induction-induc- ed "spikes" from appearing on the +12-volt DC power-supply line. If the telephone is hung up within the four-second time-out period, additional loop current will flow through the seizure net- work and activate RY2. That causes normally open contacts of RY2 to close. The project is now in the "on-hold" mode, LED1 will be brightly lit, and the selected radio station will be heard in the telephone line regardless of the position of jumper Jl. After the four-second time-out period, RY1 will deactivate. The loop current flowing through RY2 keeps the seizure network across the tele- phone line and the unit remains "on-hold." To return to the call, the tele- phone can be picked up. The loop current flowing through the seizure net- work is reduced because of the double termina- tion (the tele- phone and sei- zure network). RY2 deactivates, and the seizure network is dis- connected. Kick-back ca- pacitor C5 en- sures the loop current is re- duced below the drop-out cur- rent for RY2. That reduction in current turns off LED1, dis- connects the music, and re- connects the caller. If the tele- phone is not hung up within the four-second time-out period, RY1 will deacti- vate and the project will be taken out of the "stand-by" mode and placed in the "normal" mode. LED1 will not be lit, and the caller will be disconnected if the tele- phone is hung up. Latching push-button switch SI is used to tune in the desired station. When it is in the IN posi- tion, the seizure network is placed across the telephone line and the output of the tuner is also connected (regardless of the status of Jl}. That allows you to hear the output of the FM tuner and adjust the station tuning and volume. (A feature of the re- ceiver is the elimination of inter- station "hiss, " therefore no audio will be present until a station is tuned in.) FM receiver circuit At the heart of the receiver cir- cuit is IC4, a TDA7000 Signetics FM receiver. This 1C has a fre- quency-locked loop system with an intermediate frequency (IF) of 70 kHz, The IF can be chosen by active RC filters. The only func- tion that needs tuning is the os- cillators resonant circuit, which selects the reception frequency. The antenna is made up from the telephone line and the RJ11 cable. The RF signal travels through that path and is coupled via DC blocking capacitor C6 to the RF inputbandpass filter. This broadband low-Q filter consists of CIO, Cll, and LI. Its primary pur- pose is to pass RF energy in the 88.0- to 108.0-MHz range while attenuating RF energy from above and below that frequency range. The bandpass filter serves to suppress potential interfering energy from outside the commer- cial FM broadcast band. The bandpass filter also acts as a split-capacitor (also known as a tapped capacitor) input imped- ance-matching network to IC4. It matches a 75-ohm RF input im- pedance to IC4's 1.5K input im- pedance. The reverse RF input is decoupled by C12. After the RF signal passes through the input bandpass fil- ter, it goes to the input of the in- ternal Gilbert cell mixer where it is mixed with the local oscillator (LO) signal. As mentioned earlier, the frequency of the LO is de- signed to produce an IF of 70 kHz, The tunable LO, connected between pins 5 and 6 of IC4, con- sists of tank components L2 and D9. Varactor diode, D9, is DC-volt- age tuned by the voltage-divider circuit consisting of R13, R18, and R12, The low end of the tun- ing range is set by R13 while the high end is set by R12. A high impedance path to the oscillator is provided by Rll, keeping it from appearing on the DC tuning control voltage. C21 acts as an RF "short" to ground which prevents the oscillators RF from entering D9. The IF output of the mixer is routed to a three-stage broad- band low-g IF filter network. The first section (C20 and C19) determines the cut-off frequency for the second-order low-pass IF z filter. The second section (C8 and o C7) determines the upper and m lower passband. The third sec- m tion (C9) determines the pass- 5 band of the third section of the - low-pass filter network. 2 o z o 2 o o Q < ON-HOLD LOGIC "*"KEY DECODE RY1 TABLE 1— DTMF DECODER OUTPUT CODES FM RECEIVER IC4 TUNER AUDIO . AMPLIFIER SEIZURE NETWORK RV2 FIG. 1— THIS IS THE BLOCK DIAGRAM of the FM on-hold unit. The circuit consists of three basic sections; a DTMF decoder/on-hold logic, seizure network, and an FM receiver. Digit D8 D4 D2 D1 1 1 2 1 3 1 1 4 1 5 1 1 6 1 1 7 1 1 1 8 9 1 * 1 1 # 1 A 1 1 B 1 1 C 1 1 1 D After the signal is passed through the IF filter section, it is demodulated. The quadrature detector is tuned by C14. The fre- quency-locked loop (FLL) filter, which suppresses IF harmonics and prevents them from appear- ing at the output of the demod- ulator, is controlled by C18. The demodulated audio signal from pin 2 passes through a deemphasis network consisting of C22 and R14. A load for the audio output current source is also provided by R14. The audio signal passes through C23 and R15 to the in- verting input of audio amplifier IC3-c. Feedback resistor R19 con- trols the gain of the amplifier from to 10. Transformer Tl matches the amplifier's output impedance to the telephone line impedance. Construction The author's prototype is shown in Fig. 3. The entire FM on-hold circuit is mounted on one double-sided PC board. The use of a single-sided board will work as long as the jumper wires are added to the top where neces- sary. We recommend that a PC board be used because of the VHF range involved in this project. We have provided foil patterns of the PARTS LIST All resistors are U-watt, 5%. C28— 100 \iF, 25 volts, 20% T1 — audio transformer, 500-ohm pri- R1, R2, R11— 100,000 ohms electrolytic ma r y , 200-0 hm secondary R3, R4, R7, R13, R15— 10,000 ohms Semiconductors (Mouser no.42TM002) R5 — 1 Megohm D1-D7, D10, D11— 1N4003, 1 amp S1— DPDT latching push button R6— 39,000 ohms 200 PIV rectifier diode switch R8— 2000 ohms D8 — not used XTAL1 — 3.58-MHz parallel resonant R9— 2700 ohms D9— MV209 varactor diode crystal, HC-18/U case R10— 1200 ohms (Motorola) J1 — 0.1 -inch single inline jumper bar R1 2— 130,000 ohms LED1— Red LED and strap R14 — 20,000 ohms IC1— MC145436 DTMF decoder Miscellaneous: Male power jack, R16, R17-^70 ohms (Motorola) female PC board-mounted lug re- R18. R19— 100,000 ohms horizontal IC2— 4082 dual 4-lnput and gate ceptacies, 11 7- VAC power pack (15 PC-mounted potentiometer IC3— LM324N quad op-amp VDC at 150 mA), PC board, 6-foot Capacitors. All are 50 votts DC, IC4— TDA7000 FM Receiver (Sig- modular line cord, male RJ11 to 10% tolerance, mono or ceramic netics-Philtps) lugs, project case (Builder's disc unless otherwise Indicated. IC5— 7812 + 12-VDC, 1-amp Choice), and 3 14-pin IC sockets C1, C2, C6— 0.022 u.R 250 WVDC, regulator Note: The following items are 20% tolerance IC6— 78L05 +5-VDC, 0.1-amp available from HESC Inc., P.O. C3, C13, C17, C23-C26— 0.1 \lF regulator Box 12649, Fort Wayne, IN C4, C27— 10 (j.F, 10 volts, 20% Q1— MPSA13 NPN Darlington 46864-2649, (219) 482-7190: tantalum transistor • A complete kit of parts includ- C5 — 47 u.F, 63 volts, 20% electrolytic Other components ing PC board, all components, C7, C20, C21— 3300 pR 50 volts L1— 0.138 (i.H fixed inductor machined plastic case, and C8, C14— 330 pF (Coilcraft no. 132-09 or 9T no. 24 16 power pack— $69.95 -+ $3.00 C9— 150 pF -inch ID) S&H. C10, C11— 39 pF ceramic disc L2— 0,060 \lH shielded variable in- • An assembled and tested C12, C22— 2200 pF ductor (Coilcraft no. 150-02J08Sor unit— $119.95 + $3.00 S&H. C15— 220 pF TOKO no. MC122) Send check or money order, IN C16, C18, C29— 0.01 fiF, 20% RY1 , RY2— DPDT relay 12 VDC (Aro- residents add 5% sales tax. Al- C19— 180 pF mat no. DS2YE-S-DC12) low 6-8 weeks for delivery. 60 FIG. 2— SCHEMATIC OF THE FM ON-HOLD unit. The output of KM, a DTMF decoder, Is a 4- bit word that controls the on-hold logic. The FM receiver, IC4, uses a frequency-locked loop system with a 70-kHz intermediate frequency, which is tuned by a tank circuit consisting of L2 and D9. Spurious reception is eliminated by a mute circuit in the IC. component side and solder side of the PC board if you wish to make it yourself. If you choose not to use a PC board, the use of a prototype style board is recom- mended. You should note that the use of wire wrapping will not work for the receiver portion of this project due to ground return path impedance problems. You can use IC sockets for all IC's ex- cept IC4, the TDA7000 FM re- ceiver. The use of an IC socket at VHF frequencies should be avoid- ed. Figure 4 shows the parts-place- ment diagram of the unit. Before you begin construction, there are a few things to keep in mind: • Use proper soldering tech- niques — The importance of prop- er soldering cannot be empha- sized enough for VHF circuits. We recommend that the flux resi- due be removed from the com- pleted PC board using a mild non-CFC cleaner that's not harmful to plastics. Always read the manufacturer's label. • Static sensitive devices — Ob- serve electrostatic discharge pre- cautions when handling individ- ual semiconductors as well as the completed circuit board. • Component leads- — Pre-form component leads before install- ing them in the board. • Non-polarized capacitors — When installing these compo- nents, orient them so their val- ues can easily be read. This will help if troubleshooting is needed later on. • Resistors — Mount resistors so they can be read from left to right and top to bottom. This also aids in troubleshooting. • Tl— Bend the tabs flush against the PC board. The audio transformer has a "P" indicating the primary side. The primary mounts towards the outside of o < m CD m J2 61 o z o =/Bds where s is the cross-sectional area of the path. Since the area is uniform nl = BS = L/fiS In the circuit shown in Fig. 2-b, a current I exists in a material of length L. conductivity on ^ m • • - • • • • t* * a * * r, w^* * r^ w j ^ s m £ w m to CD 67 ^^^^^ J1BLED3 ^&®*®*®*® x ® d> «(D (D^d) ^rs^q' 1 «»r» ! S33 : S32 * I* ! S31 * ■• S30 S29 S28 • r*=I *, J* fc - C IS- 14/ — . — , RN11 ( C9 *SEE TEXT FIG. 5— MOUNT ALL COMPONENTS as shown here. Note that C4. J2, and all five jumper headers mount on the foil side of the board. to o z o ffi h- o W O 5 < BREAK HERE FIG. 6— CONNECT MICRO-MON to the tar- get system dir ectly, or insert a resistor in series with the wait line. 6) Verify that when SI is in the "run" position, an oscilloscope probe attached to the wait connector (J4) measures a logic one (5 volts), and when in the "stop" position, a logic zero (less then 0. 5 volts). 7) Hold SI in the "step" posi- tion and verify the presence of high-going pulses at J4. The pulse has a narrow width (about 1 jjls) and low repetition rate (2 Hz), so it may be hard to see. Use a scope in single-sweep mode or a logic probe with built-in pulse stretcher. 8) Verify that when you release SI, the J4 pulses halt. 9) Move SI to the "step" posi- tion several times, and verify that the J4 signal pulses high when you do that. If any of those tests fail, remove power and debug the circuit be- fore continuing. Final checkout Now you're ready to connect the unit to a target system. 1) Attach a test cable to the MICRO-MON unit and connect the clip over the PROM in the tar- get microprocessor system, at the same time ensuring correct pin-1 orientation. 2) If the target microprocessor uses an open-collector or open- drain device in the wait circuit, simply clip the wait cable direcdy to the wait pin. Another method is to insert a 200-ohm resistor between the target's wait logic TABLE 1— OPTION SELECT JUMPERS Jumper Position Description 1 1-2* 2-3 Wait low Wait high 2 1-2* 2-3 Enable internal power Enable power from test clip 3 On Off* Enable Match Enable signal to test clip 4 1-2* 2-3 Enable Match Enable to 8-bit test clip Enable Match Enable to 1 6-bit test clip 5 On* Off Enable power to test clip pin 30 Disable power to test clip pin 30 * = Default 66 •• f ** / — * " — '-v. * , — . • ^— • » »- iw \ • • • • » > * * • * — s* * • . • ~r) •/ • ■ >• V »» • • • • B ft /, -s=^ ^ i^- — . ' ^ ' ■ , , N^£_ _- , ^/ •■! «~ « ,» • ■ »V» • • • / \V* *JtA* * • • • • * ™ * — ~* *~ * i <* ■ * ** * * * — ™ / • »-«^*l* li *^^, tTi* im» .^ trz'm #— - , *"«- -«l • * /j l^^^f ^ 'z ^ * S~ ' i^»] ** .... y^ =^ / r/ " -^ J\ • *»>» Mi)Jn)Jtn}j>*nnnjn>n)n)tHJi>n>i)i3)>) »j)t3MitM]))jn \ EXAMPLE 1 - INTELLIGENT DISPLAY DRIVER j THIS ROUTINE WRITES "8748" TO THE NSH 1416 4 DIGIT DISPLAY ; LABEL A CODE WRITES THE LETTER "X" TO ALL 4 DIGITS ; LABEL 8 CLEARS THE CURSOR WITHIN THE NSM 1416 j LABEL C WRITES "8748" INTO DIGITS 0-3 ; LABEL D HALTS THE PROGRAM BY LOOPING ON ITSELF ; SUBROUTINE WRITEX PERFORMS THE WRITE FUNCTION ; ■ NOTE: CE- PIN ON THE NSM 1416 IS GROUNDED ; 1 *> ? 9 * * r>*^* i f i H i i r* i »i i * i t * H i rH i i i i i ^ ADDRESS I : | CODE I LABEL I 1 1 0000 23 07 I A H0V A,#00000111B ;WRITE LETTER X TO ALL 4 DIGITS 0002 14 2F CALL WRITEX '.WRITE TO DIGIT 3 0004 23 06 MOV A,#OOOQ0110B 0006 14 2F CALL WRITEX ;WRITE TO DIGIT 2 0008 23 05 MOV A, #000001 01 B OOOA 14 2F CALL WRITEX iWRITE TO DIGIT 1 OO0C 23 Oil H0V A,#00000100B 0OGE 14 2F CALL WRITEX ;WRITE TO DIGIT 0010 9A 00 B AKL P2, #000000008 ;CLEAR THE CURSOR 0012 23 00 MOV A,«0 0014 90 M0VX eflQ,A 0015 23 07 C H0V A,#000000111B ;WRITE UTTER 8 TO DIGIT 3 0017 3A 0UTL P2,A 0018 23 38 MOV A.t'S 1 001A 90 M0VX §R0,A 001B 23 06 MOV A,#GQ0000110B ;WRITE LETTER 7 TO DIGIT 2 001 D 3A 0UTL P2,A 001 E 23 37 MOV * t #>T 0020 90 HOVX @RO,A 0021 23 05 H0V A,#000000101B ;WRITE LETTER 4 TO DIGIT 1 0023 3A OUTL P2,A 0021 23 34 B0V A,#'4' 0026 90 MOVX e«o,A 0027 23 04 H0V A,#000000100B ;WR!TE LETTER 6 TO DIGIT 0029 3A OUTL P2,A 002A 23 38 MOV A.rs' 002C 90 H0VX §R0,A 002D 04 2D D JMP $ ;LO0P HERE FOREVER 002F 3A WRITEX 0UTL P2,A ;WRITE LETTER X SUBROUTINE 0030 23 58 MOV A.i'X 1 0032 90 H0VX eRO,A 0033 83 RET Z § m m 75 LISTING 2 »ii;ij>iiiii*i5»»**ii5J53>iitHii»9Ji 5 i EXAMPLE 2 - EXPENSIVE LED BLINKER S > THIS ROUTINE SLINKS AN LEO * J 3 * LABEL A WRITES 01 HO TO THE BUS - TURNS ON LEO ; J I LABEL B WRITES 00 HEX TO THE BUS - TURNS OFF LED ; 1 LABEL C JUMPS TO THE BEC INNING LABEL A 3 3 J 9 3 SUBROUTING KILLTIHE DECREMENTS 2 REGISTERS TO CREATE A DELAY ; a i j >3> 1 1 i S3 i 5 3 5 3* 3 5 1 J 5 j 5 i * J 3 i i i * i i I » 3 ADDRESS CODE LABEL | I 0000 23 01 1 A MOV AjlOOOOOOOlB ;WRITE A BINARY 00000001 TO THE DATA BUS 0002 02 OUTL BUS, A ;TURN ON TRANSISTOR AND LED 0003 1» 0C CALL KILLTIHE (KILL SOME TINE 0005 23 00 B NOV A,#O0O0OOOOB ;vmtTE A BINARY OOOOQOQC TO DATA BUS 0007 02 OUTL BUS, A ;TURN OFF TRANSISTOR AND LED 0008 1ft OC CALL KftLTIME jKILL SOME TINE OOOA 04 00 C JHP A ;G0 DO IT ALL AGAIN OOOC 68 FF KILLTIHE NOV RO.iOFFH ;LOAD REGISTER RO XI TH FF HEX OOOE B9 FF INNERLOOP MOV R1,(foFFH ;LOAD REGISTER R1 WITH FF HEX 0050 E9 10 OJNZ R1,$ ; DECREMENT R1 TO 00 0012 E8 OE DJNI RO, INNERLOOP -(DECREMENT RO - IF RO NOT EQUAL THEN DO INNERLOOP 001* 83 ■RET ;DON£ KILLING TINE CO a z o i LLI Q < EC FIG. 3— THE COMPLETED UNIT. Double check all voltages on the pads ol IC1 and IC2 before installing them in their sockets. When you apply power, LED2 should illuminate. DB-25 mounting hardware be- cause of the many different styles of connectors. Install your DB-25 connector and drill mounting holes accordingly. It's a good idea to double check all voltages on the pads of IC1 and IC2 before installing them. When you are satisfied that all is well, install the IC's. Apply power and LED2, the main power LED, should illuminate. LED1 should not illuminate indicating that IC2 has initialized transistor pair Q1-Q2 properly and no volt- age is present at the target ZIF socket (IC3). Figure 3 shows the completed unit. Using the programmer Connect the serial port from your computer to the program- mer's serial connections and ex- ecute the terminal program at this time. If all is well, "READY FOR COMMAND" should appear on your screen. This indicates that the terminal program has established communications with the programmer. If "UN- ABLE TO COMMUNICATE WITH PROGRAMMER" appears, some- thing is not right with the pro- grammer or your serial port connections. Power up the programmer and start the terminal program (PROG. EXE)— if you haven't done so already. You should get "READY FOR COMMAND" on the screen before beginning. You may socket the target device in the IC3 ZIF socket any time after you power up and any time LED1 is not on. Note the list of commands. You may execute a command by typ- ing the letter contained in paren- theses preceding the command. The terminal program has been written so that its use will be ob- vious to the user. For those of you not familiar with programming any sort of programmable device, the basic steps are: 1. Make sure the target device is blank. 2. Load the binary image of the file you want to program into the terminal program. 3. Program the device. Some sample programs and circuits have been included that use the 8748H in a minimum mode configuration. The intent here is to allow you to enter the machine code into a file using a 76 +-5VJ 27pF XTALa 27pF 1 M F t 20 40 4-DiG[T DISPLAY MODULE 26 XTAL 874BH XTAL WR CU At AC D7 D6 D5 D4 03 D2 D1 DO iO 23 22 19 18 17 16 15 13 12 10 20 19 IS D5 D4 DO D1 D2 D3 Cl W CU AO A1 D6 -V + v f Qsf\ [N/n ( \\\7h (N/V\ VfeDjlJ \I/imJ \i/n) \i/t\tj TSM1416 FIG. A — INTELLIGENT DRIVER for a 4-digit display module. The circuit will first put an "X" in all four digits and then display "8748." The accompanying software is shown in Listing 1. The TSM1416 4-digit display module is manufactured by Three-Five Systems, Inc. \hj> oaia AG ( fw f I ^t I (-« 3 15 /is INCHES — FOIL PATTERN for the microcontroller programmer, shown actual size. binary editor and then program that file into a target 8748H. This eliminates the initial need for a cross assembler and gives you the opportunity to experiment with minimum cost and effort. The circuits presented illustrate the advantages of using an inte- grated microcomputer like the 8748H — and they're simple enough to be built on an experi- menter's breadboard. Figure 4 shows an intelligent driver for a 4-digit display mod- ule, and Listing 1 shows the ac- companying software. The cir- cuit will first put an "X" in all four digits and then display "8748." While it's nothing fancy it does show you how to make the dis- play work. The TSM1416 4-digit display module is manufactured by Three- Five Systems, Inc. Our second example circuit, shown in Fig. 5, is our "expensive LED blinker circuit. " We say "ex- pensive" because you certainly + 5 VOLTS DC J 27pF XTAL 27pF r 1nF JT FIG cuit 40 ison 126 @ XTAL B74BH XTAL WR CD A1 A0 D7 D6 D5 D4 D3 D2 D1 DO LED w 2N2222A IK 5— EXPENSIVE LED BLINKER cir- While it is somewhat overkill, it is very useful as a teaching tool. The soft- ware for this circuit is shown in Listing 2. don't need a microcontroller to turn an LED on and off— the cir- cuit is somewhat of an overkill. However, the circuit's simplicity becomes extremely beneficial when it's being used as a teach- ing tool. That way you can con- centrate on the microcontroller's operation. The software for the Fig. 5 example is shown in List- ing 2. For the two example circuits we've provided, you can copy the software routines directly from the listings or download them from the RE-BBS as part of the main ZIP file (874XPGR.ZIP). R-E o < m 77 inMZEHHIEini Electronic dog tag contest, case & enclosure resources, SMPTE time code standards, photovoltaic panel bargains, and a solar energy breakthrough! DDN LANCASTER We'll start off with our usual reminder that this is your column and you can get tech help and off-the-wall networking per the "Need Help" box below. Your best calling times are often weekdays 8-5, mountain standard time. We have some really heavy stuff for this month, so let's have at it... Solar energy breakthrough? Well, just maybe. It is far too soon to tell. But I guess we are overdue for a general update on solar energy. On a bright Arizona day, you can figure around 1000 watts per square meter of incoming solar energy. This is a fairly diffuse and a rather weak energy source. A source that is made much worse by being there only some of the time. And made even more so by today's appallingly poor electrical conversion efficiencies. Silicon solar cells are inherently in- efficient when fed sunlight, which makes a diffuse energy source even harder to use. A semiconductor solar cell operates by receiving a precise packet of energy and then using that packet to release one electron to an external electrical circuit. The energy of incident light is pro- portional to its frequency E = ftvand all of that. At one single near-infrared frequency, the light energy packets are exactly the correct size needed by a silicon solar cell to get efficiently converted into electrical energy. All lower frequencies become largely useless waste heat. What about higher frequencies? Only the magic energy packet size counts, so the higher frequencies will both generate useful power and extra waste heat. The higher the frequency, w the higher your waste. The "spare 2 change" above your critical energy § level will get lost and appears to be q unrecoverable. Sort of like a dollar j tollbooth that requires you to dump all ^ the change in your pocket. o When you consider the entire solar tr spectrum, the best possible overall efficiency you can get from a silicon solar cell is around 25 percent. This appears to be a fundamental and un- avoidable physical limit. Out in the real world, silicon solar panels are much less than ideal, and you are very lucky to get an overall long-term system efficiency above ten percent. And often less. Which is dangerously close to the seven percent "breakeven" level, be- low which any solar panel will never pay for itself, owing to the materials and labor that go into the system, and the time value of the money used to finance the construction. At seven percent efficiency, a one- meter square solar panel will gener- ate around half a kilowatt hour per day, or around $5 of electricity per year. Yes, there are tricks you can pull to raise your efficiency Such as using a pair of different semiconductors hav- ing different work functions. Or using concentrators. Or heating water with the waste heat. Or trying to reshuffle or "downconvert" your solar spec- trum to the magic frequency. But these seem mostly laboratory pipe dreams that, in my opinion, are un- likely to see the light of day. In fact, the existing solar electric power plants are actually being torn down, owing to low efficiencies and really bad economics. Many hackers should be interested in the great bar- gains in the used (and somewhat de- graded) solar panels now being offered wholesale by Carrizo Solar and retail by Surplus Traders. NEED HELP? Phone or write your Hardware Hacker questions directly to: Don Lancaster Synergetics Box 809 Thatcher, AZ 85552 (602) 428-4073 Instead, "what if" our sun was a radio source? You would simply get an antenna and a rectifier, and high direct solar-to-electric conversion efficiencies can now be yours. This is called a crystal set. and all of the technology does appear to be fairly well proven. Efficiencies near 100 per- cent would be theoretically possible. With any care at all, the real world long-term efficiencies would not have to be that much worse. Your same square-meter panel could approach $80 per year in electricity, a much more attractive value. The only little problem is that, until now, nobody was quite sure what an optical antenna or an optical rectifier was. Enter an individual researcher by the name of Alvin Marks who uses crossed pairs of a special Lumeloid film that uses the antenna/rectifier method for a direct solar conversion. Figures now including an 80-percent efficiency and a penny per kilowatt hour are being bandied about. This does look legitimate. No ob- vious physical laws are being broken and the Electric Power Research In- stitute has seen fit to throw some cash at the idea. And we are certainly getting much better at working with stuff the size of optical wavelengths. All of this is brand new and was rushed to meet this month's Hardware Hacker deadline. All the info I have on it so far is the brief note in Business Week, August 12, page 49. For more on direct solar con- version, stay tuned or check into my PSRT bulletin board on GEnie. Other obvious news sources include Science News, Science, and the technology section of the Walt Street Journal. For ongoing technical info, do try EPRI or else the Dialog information Service. The search keywords could include solar, Marks. Lumeloid, power. EPRI, and energy. Finally, for the ongoing grass roots shirtsleeves solar energy info, be 78 OE... MERAL TIME CO! This older and nearly obsolete code needs an auxiliary audio channel and outputs one 1200 baud code string per video frame. The tape MUST be in motion for reading. The code is synchronized to begin on the fifth horizontal scan line of the first field in the frame. The low state equals IRE units and the high state equals 80 IRE units. The data stream is 80 bits long and follows the format of figure 2. It uses Manchester, or biphase encoding that is self-clocking and can be read in either direction. Various bits in the data are assembled into BCD words identifying the frame, the seconds, the minutes, and the hours. Other bits are used for synchronization, time adjustment, simple parity and special use flags. Reference; SMPTE 12M-1986 (B) VERTICAL INTERVAL TIME CODE... This newer and widely used code is embedded each field on single horizontal lines during retrace. The code gets repeated two, and sometimes four times, beginning on line 10 of each field's vertical retrace interval for improved noise Immunity. The code begins 10.5 microseconds into the line. The tape can be stationary or moving in either direction. There are 90 bits to the code, sent at a stationary rate of approximately 1.8 MHz. The format appears in figure 3. It also uses Manchester, or biphase encoding that is self-clocking and can be read in either direction. Various bits in the data are assembled into BCD words for the field, the seconds, the minutes, and the hours. Other bits are used for sync, time adjustment, full CRC error checking, and special flags. Reference: SMPTE RP-1 08 FIG. 1— THE SOCIETY FOR MOTION PICTURE ENGINEERS, or SMPTE offers these two standard time codes for video production or editing. sure to check out that really great Home Power magazine and the new Photovoltaic Network News. Video time codes We are shortly going to see lots of new software and hardware that will make any totally professional video production on a mainstream home computer system roughly as compli- cated as writing a business memo with a word processor. And that's real editing on a precise field-by-field basis. With the full genlock, overlay, station sync, anti-aliasing, and color keying. Plus all of the "gee whiz" bells and whistles. Real editing demands that you can locate and identify each and every individual field in the entire video. That normally gets done by using a video time code. Figure 1 summarizes the two most popular time-code systems in use to- day. Both of these are standards pub- lished by the Society for Motion Picture and Television Engineers. A useful Time Code Handbook is now available through Cipher Digital. It in- cludes the SMPTE code standards along with the related MIDI electronic music timing code. My copy was free, but they may panic when they see the humongous stack of reader-service responses that they are certain to get from this column. The human persistence of vision is somewhere around 40 to 50 Hertz, so tricks have to be played to mini- mize the flicker of many motion dis- plays. For instance, with any 35- millimeter movie, the light is turned off and a frame is suddenly moved into position by using an intermittent action known as a Geneva Stop Mechanism. The light is turned back on by a beam interrupter. The light is turned back off. The light gets turned on again, projecting the exact same image a second time. Finally, the light gets turned off and your next frame is moved into position. We say the sound movie uses a frame rate of 24 frames per second. The field rate is 48 fields per second. In this case, the two fields per frame are identical. With standard television, you have a frame rate around 30 frames per second. Each frame gets broken into two fields, one containing the odd scan lines, and another containing the even scan lines. This is known as Be an FCC LICENSED ELECTRONIC TECHNICIAN! i at home In spare time i| No previous experience needed! No costly school. No commuting to class. The Original Home-Study course prepares you for the "FCC Commercial Radio- telephone Li cense." This valuable license is your professional "ticket" to thousands of exciting johs in Communications, Radio- TV, Microwave, Maritime, Radar, Avionics and more. . .even start your own business! You don't need a college degree to qualify, but you do need an FCC License. No Need to Quit Your Job or Go To School This proven course is easy, fast and low cost! GUARANTEED PASS— You get your FCC License or money refunded. Send for FREE facts now. MAIL COUPON TODAY! commnriD productions FCC LICENSE TRAINING, Dept. 90 P.O. Box 2824, San Francisco, CA 94126 Please rush FREE details immediately! ADDRESS . CITY . 1 I I I I I I I I J $£ Save on cable rental fees! , {CABLE TV | JDESCRAMBLERSS t ANY PRICE 1 % JERR0LD-T0C0M-ZEN1TH 1 ft HAMLIN-OAK-PIONEER % SCIENTIFIC ATLANTA $ % 24 HOUR SHIPMENTS! # MONEY BACK GUARANTEE! jf • QUANTITY DISCOUNTS! JJ MASTER CARD /AMEX/ VISA /C.Q.D * '5 H*3 ^^ VOL* *v rht Have make and model number of *i equipment used in you area ready. | CALL TOLL-FREE i f 1-800-284-84321 | CABLE WAREHOUSE * W 10117 West Oakland Park Blvd., # fi? Suite 51 5, Sunrise, FL 33351 Cr "TJ HO FLORIDA SALES 3(J CIRCLE 195 ON FREE INFORMATION CARD 79 w Q Z o cc H o LU o Q < ir interlace and gets used to reduce the display flicker. The field rate is near 60 fields per second. Color TV introduces a further com- plication in that successive frames must be paired as Frame A and Frame B. This is done to reduce color subcarrier visual artifacts. Thus, only the multiples of two frames or four fields should ever be cut or edited. A glitch results if B does not always follow A. and vice versa. The original or Lateral Time Code standard was first intended for movie film, and later adapted to videotape. This largely obsolete code is sum- marized in Fig. 1 and is detailed in Fig. 2. The lateral time code needs a sep- arate audio channel. An entire frame is used to transmit 80 bits of digital data at a normal rate of 1200 bits per second. The tape must be moving. either forward or backward before the time code can be read. There is also no provision for error trapping. A Manchester or biphase coding is used. This just means that each bit changes at its beginning. A "one" bit also changes at its middle; a "zero" bit does not. A code of this- type is inherently self-clocking and can be NEW FROM DON LANCASTER HARDWARE HACKER STUFF Hardware Hacker Reprints II or III 24.50 Midnight Engineering Reprints 16.50 I ncred ible Se c ret Money Ma c h I ae 16.50 CMOS Cookbook 24.50 TTL Cookbook 19.50 Active Filter Cookbook 19.50 Micro Cookbook vol I or II 19.50 Lancaster Classics Library 109.50 Enhancing your Apple I or II 17.50 Apple Writer Cookbook 19.50 Absolute Reset lie & lie 19.50 Enhance I or II Companion Disk 19.50 AppleWrlter CB or Assy CB Disk 24.50 POSTSCRIPT STUFF Ask The Guru Reprints I, II or III 24.50 LaserWriter Secrets (lie/Mac/PC) 29.50 PostScript Show & Tell 39.50 Intro to PostScript VHS Video 39.50 PostScript Beginner Stuff 39.50 PostScript Cookbook (Adobe) 15.50 PostScript Ref, Manual II (Adobe) 23.50 PostScript Program Design (Adobe) 22.50 Type I Font Formal (Adobe) 1 5.50 LaserWriter Reference (Apple) 19.50 Real World Postscript (Rolh) 22.50 PostScript Visual Approach (Smith) 22.50 Thinking In PostScript (Held) 22.50 The Whole Works (all PostScript) 299.50 FREE VOICE HELPLINE VISA/MC SYNERGETICS Box 809-RE Thatcher, AZ 85552 (602) 428-4073 CODE BIT i O -j-\ FRAME UNITS S 1 i 2 :. 4 FIRST BINARY CROUP '. 7 3 10 1 -^ FHAJ.IE TENS 9 ID ,-.«.;: . r „ wf I|4r , n COLOR FRAME FLAG 12 13 SECOND BINARY OHO UP ■ ■'- •'. ■■'■ 1 SECOND UNITS ■7 2 IS 4 19 S 20 THIRD BINAHY GROUP : ■ :-.' 23 24 10 SECOND TENS 25 20 26 27 ■ ■ BIPHASE CORRECTION BIT 21) FOURTH BINARY GROUP 29 -:. .11 :■,:■■ i MINUTE UNITS 33 2 34 4 35 ■ as 37 FIFTH [WARY GROUP 38 39 JO 10 MINUTE TENS ■ 41 20 42 40 ■13 44 BINARY GROUP FLAG BIT SIXTH BINARY GROUP 45 46 '.- 46 49 1 1 2 HOUR UNITS 50 4 51 52 SEVENTH BINARY GROUP 53 54 55 56 -iS-j HOUR TENS 57 56 UNASS1GNF0 AD3RESS BIT ~ BINARY-GROUP FLAQ~BiT 59 60 EIGHTH BINARY GROUP " "sync word mfv ~ sync word Bit -:■: SYNC WORD BIT T 66 69 SYNC WORD BIT -1- SYNC WORD BlT T ■ - SYNC WORD BrT V 7' SYNC WORD BIT V SYNC WORD BIT -1- ~ ~SYNC WORO BIT -r - " 72 '•:. .-.i SYNC WORO BIT T SYNC WORD BIT T SYNC WORO BIT T 75 76 .'V SYNC WORO BIT T 76 SYNC WORD Blf T? SYNC WORD BIT V m FIG. 2— THE SMPTE lateral time code needs a separate audio channel and re- quires a full frame to output at its 1200 baud rate. The tape must be in motion to read the code. read in either direction. The first data bit is supposed to start off on the fifth TV horizontal line Those individual bits are largely grouped by fours into Binary Coded Decimal words. These become the units and tens of the frames, sec- onds, minutes, and hours. There are also some special bits used for sync, SYNC bit^- 1 SYNC BIT V 2 1 FRAME UNrTS 3 2 4 4 S S 6 7 FIRST BINARY GROUP :■ - 10 sync am* 11 SYNC BIT *0' ■- 10 | -rjH FRAME TENS 13 '-: DHOP FRAME FLAG COLOR FRAME FLAG ■'■ 16 .17 16 SECOND BINARY GROUP 19 - --- _ 20 ; ■ sync bit t " syncbTt-o- " 22 23 I SECOND UNITS 2 4 24 25 8 36 27 28 THIRD BINARY GROUP 29 30 SYNcBrr-r SVNC BIT -Ji- : ■■■ lt) SECOND TENS 20 34 40 35 FIELD MARK V 36 37 FOURTH BINAHY GROUP ~ svRcflfr^- - " 36 3S -1 :■ 41 SYNC BH -0- -. 1 43 2 44 4 45 6 46 47 46 FIFTH BINARY GROUP 49 50 SYNC BIT-I- 51 SYNC BIT -a- 52 1 ,S MINUTE TENS 5.'' 1 20 =J 1 40 56 UNASS1GNED ADDRESS BiT 56 5? SIXTH BINARY GROUP 58 59 60 SYNC BIT "1- syncbTt-o'" 61 r::> 1 HOUR UNITS 63 2 64 4 6.5 6 m 07 >:■•:< SEVENTH BINARY GROUP 69 70 SYNC BIT -1 " 71 SYNCBtTTr HOUR TENS ~ UNASSIGNED ADDRESS SIT UNASSIGNED AOORESS B~T~ " 75 76 7? 78 81 SYNC BIT T SYNC&rriT 82 83 64 85 86 67 aa 89 CRCERftOft TRAPPING CODE FIG. 3— THE SMPTE vertical interval time code is sent each field on a blank horizon- tal line at a 180 Kilohertz baud rate. The tape can be stationary or can move in ei- ther direction. user definition, and specific flags. The code is slow enough to be read with machine language code by just about any computer. 80 ELECTRONIC DOG TAG PERMANANT FOAM ADHESIVE \ BADGE. PASS, TOLL CARD, ANIMAL COLLAR, PATIENT RECORD, WORK IN PROGRESS, PRICE TAG, ETC... ETC., ETC. I FIG. 4— ELECTRONIC DOG TAGS using the cheap and durable Maxim DS1990 series of touch memory chips can get stuck on virtually anything. They do offer electronic reada- ble serial numbers and several thousand of bits of read-write non-volatile memory. These are the shape of a coin cell and last for ten years. Their newer, or Vertical Interval Time Code is related but is far more sophisticated. It is summarized in Fig. 1 and detailed in Fig. 3. The entire 90- bit time code is transmitted within a single horizontal line. The chosen line should fit somewhere between blanked retrace horizontal lines 10 and 20. The code must be transmitted twice per field on non-adjacent hori- zontal lines, and often is transmitted four times for extra noise immunity. A similar Manchester or bi-phase encoding gets used. This one has a much higher bit rate, typically around 1.8 MHz during a pause. The time code burst begins 10.5 seconds into the selected horizontal line. The VITC can get read while the tape is stationary or moving in either direction at any reasonable speed. Error trapping and other special bits are also included in the code. Unfortunately, the bits do fly by a tad too fast to catch using machine language code on most mainstream microcomputers. So a special fast decoder is needed. Faster yet if you want to search and anticipate during a fast forward or rewind mode. But the logic is simple enough for most PLA or EPLD devices. A dual port RAM or an intelligent peripheral driv- er could make a very useful computer interface. I do not yet know of a custom time code single chip, but it is reasonable to expect a cheap one shortly. And several simpler but nonstandard field codes are being introduced in new video products, especially by NEC. Let me know if there is anything you'd like to see on vide time codes. CASE AND ENCLOSURE RESOURCES American Science & Surplus 601 Linden Place Evanston, IL 60202 (708) 475-8440 CIRCLE 301 ON FREE INFORMATION CARD Jensen Tools 7815 South 46th Street Phoenix, AZ 85044 (602) 968-6231 CIRCLE 306 ON FREE INFORMATION CARD Bud industries, Inc 4605 East 355th Street Willoughby, OH 44094 (216) 946-3200 CIRCLE 302 ON FREE INFORMATION CARD Lansing Instrument PO Box 730 ithaca, NY 14851 (800} 847-3535 CIRCLE 307 OK FREE INFORMATION CARD Carlon 25701 Science Park Drive Cleveland, OH 44122 (800) 321-1970 CIRCLE 303 ON FREE INFORMATION CARD Pelican Products 2255 Jefferson Street Torrance, CA 90501 (213) 328-9910 CIRCLE 308 ON FREE INFORMATION CARD EAI 37 Sherwood Terrace, Ste. 124 Lake Bluff, IL 60044 (708) 295-6664 CIRCLE 304 ON FREE INFORMATION CARD Rose Enclosure Systems, Inc 7330 Executive Way Frederick, MD 21701 (301) 696-9800 CIRCLE 309 ON FREE INFORMATION CARD Hoffman Engineering 900 Ehlen Drive Anoka, MN 55303 (612)422-2177 CIRCLE 305 ON FREE INFORMATION CARD Zero Corporation 777 Front Street Burbank, CA 91503 (818) 846-4191 CIRCLE 310 ON FREE INFORMATION CARD LEARN , t0 Clean/ Maintain Repair CAMCORDERS HUGE EXPANDING MARKET! Work from youi hamt 1 - part-time or lull-lime! No piior exj&rienco needled - Average mechanical ability onEy requirement lor your success! Oyer r„5 rnfif/iGvi camcorders in use - Over $ miffiort exj>e( ted tobesoid En 1991 alone! ]i is (i fad that the vast majority of canicnrtfer mi $&5.QQ/I \t. while working al home! Gel In Now - Soon camcorders will be like VCRs. i.e., nnu in almus! every home. Tor .ic«iiiH order t laming jofoynu can ea,m$&5..(X) ficw less rh,m '.ii m [miles work. foratamtorder repair johvou can earn over$1 0(1.00. Frbe information package call or write: Toll-Free 1-800-537-0589 Viejo Publications, Inc. 5329 Fountain Ave., Dept. REC Los Angeles, CA 90029 CIRCLE 1 82 ON FREE INFORMATION CARD EARN YOUR B.S.E.E. DEGREE THROUGH HOME STUDY Our New and Highly Effective Advanced- Place- ment Program for experienced Electronic Tech- nicians grants credit tor previous Schoolhg and Professional Experience, and can greatiy re- duce the time required to complete Program and reach graduation. No residence schooling re- quired for qualified Electronic Technicians- Through this Special Program you can pull all of the loose ends ot your electronics background together and earn your B.S.E.E. Degree. Up- grade your status and pay to the Engineering Level. Advance Rapidly! Many finish in 12 months or less. Students and graduates in all 50 States and throughout the World, Established Over 40 Years! Write for free Descriptive Lit- erature. COOK'S INSTITUTE OF ELECTRONICS ENGINEERING g5*'W E 4251 CYPRESS DRIVE *£*■*-& JACKSON. MISSISSIPPI 39212 Z § m CD m 33 CIRCLE 58 ON FREE INFORMATION CARD 81 to g z O cr P o Fancy case resources What can you do when you need an outdoor- rated and waterproof case for all your electronic projects? For this month's sidebar, I've tried to round up some of the more obvious sources for premium enclosures. JerryCo, who've recently renamed themselves as American Science and Surplus sometimes have great cases at unbeatable prices. Their #10827 and #21085 both cost around $4. The most obvious source for the "suitcase" style packaging is Jensen Tools, who do stock everything from leather through plastic to aluminum to stainless steel. And the ultimate in military quality primo cases come from Zero Manufacturing, At the ulti- mate in military primo prices. But the fancy electronic case I am the most impressed with is not an electronic case at all. It's the Guard Box that is offered by Pelican Man- ufacturing. A reinforced structural resin case measuring roughly 3x6 x 8 inches, it comes in four bright colors, and costs around $7 in your smaller production quantities.. The box is airtight and watertight to thirty feet of depth. A handle, a hinged O-ring sealed cover, and positive closure snaps are included. Electronic dog tags We've seen a number of times in the past how Dallas Semiconductor has come up with really great and super hackable integrated circuits. This time they have totally outdone themselves. They call their new product line Touch Memory, or Self-Stick Chips. A typical unit is shown in Fig. 4. What you have here is a low cost and dura- ble stick-on data acquisition and stor- age system the size and shape of a coin-cell battery. Inside is a 10-year lithium cell and some unique electronics. Depending on the version, the fancy electronics gives you either a plain old 48-bit se- rial number or else thousands of bits of read-write memory. Obvious advantages over a printed bar-code label ana that (A) much more info can be stored. CB) you can up- date it at any time, CO no expensive laser reader systems are needed, and CD) the stainless case is far more durable than a paper label. What is really unique is that there is only a single contact plus the case NAMES AND NUMBERS American Voice I/O Society 4010 Moorpark Ave, Ste 105M San Jose, CA 95117 (408) 248-1353 CIRCLE 31 1 ON FREE INFORMATION CARD Business News Publishing PO Box 2600 Troy. Ml 48007 (800) 837-1037 CIRCLE 312 ON FREE INFORMATION CARD Carrizo Solar PO Box 10239 Albuquerque, NM 87184 (505) 764-0345 CIRCLE 313 ON FREE INFORMATION CARD Cipher Digital PO Box 170 Frederick, MD 21701 (800) 331-9066 CIRCLE 314 ON FREE INFORMATION CARD Dallas Semiconductor 4401 South Beltwood Parkway Dallas, TX 75244 (214) 450-0400 CIRCLE 315 ON FREE INFORMATION CARD Electric Power Research Inst 3412 Hillvtew Avenue Palo Alto, CA 94304 (415) 855-2000 CIRCLE 316 ON FREE INFORMATION CARD GEnie 401 North Washington Street Rockville, MD 20850 (800) 638-9636 CIRCLE 317 ON FREE INFORMATION CARD Home Power PO Box 130 Hombrook, CA 96044 (916) 475-3179 CIRCLE 318 ON FREE INFORMATION CARD Markel PO Box 752 Norristown, PA 19404 (215) 272-8960 CIRCLE 319 ON FREE INFORMATION CARD ground. Which is all you need for reading and writing. Figure 5 shows you how one lead can be used to both read and write. Your host computer or whatever will first input your serial activation data string. Your touch memory will then respond, returning a serial number and/or your data. The single contact is exceptionally easy to access. There's none of the alignment or fragility problems that you might have with more traditional connectors. Several different styles are newly available. The cheapest outputs only Personal Engineering Box 430 Rye, NH 03870 (603) 427-1377 CIRCLE 320 ON FREE INFORMATION CARD Philips Semiconductor 2001 West Blue Heron Blvd Riviera Beach, FL 33404 (407) 881-3200 CIRCLE 321 ON FREE INFORMATION CARD Photovoltaic Network News Rt. 2 Box 274 Santa Fe, NM 87505 (505) 473-1067 CIRCLE 322 ON FREE INFORMATION CARD SGS-Thomson 1000 East Bell Road Phoenix, AZ 85022 (602) 867-6100 CIRCLE 323 ON FREE INFORMATION CARD Siemens 19000 Homestead Road Cupertino, CA 95014 (408) 725-3586 CIRCLE 324 ON FREE INFORMATION CARD Soc Motion PicturerrV Eng 595 West Hartsdale Avenue White Plains, NY 10607 (914) 761-1100 CIRCLE 325 ON FREE INFORMATION CARD Surplus Traders PO Box 276 Alburg, VT 05440 (514) 739-9328 CIRCLE 326 ON FREE INFORMATION CARD Synergetics Box 809-RE Thatcher, AZ 85552 (602) 428-4073 CIRCLE 327 ON FREE INFORMATION CARD Waferscale Integration 47280 Kato Road Fremont, CA 94538 (800) 832-6974 CIRCLE 328 ON FREE INFORMATION CARD a 48-bit serial number. Fancier ver- sions can read or write to IK or 4K bits of internal non-volatile ROM. On yet others, a security code prevents unauthorized reading or altering. The reading and rewriting process is destructive, so very bad things can happen with an erratic contact or a partial write. To beat this, your info is first written to an internal scratchpad area. Only the complete and correct write later gets transferred to main memory. An internal checksum is also provided to let you know if your data is still valid. 82 standby mode, the touch memory monitors its rec circuitry and disables its send electronics. The host computer first enables its tri-state driver and sends out a serial Interogation and data code. The host computer then disables its tri-state driver and awaits a reply. Your touch memory receives the interrogation code and activates its send electronics. The serial number or the requested RAM data is then transmitted. The touch memory then goes into its standby mode to await further commands. The receiver grabs and Interprets the returned data. To prevent possible contact or destructive write problems, the host computer normally does a read, followed by a write, followed by a verify. enable — •• send receive HOST COMPUTER FIG. 5— ONLY A SINGLE CONTACT IS NEEDED to read from or write to your touch memory. Here is how it gets done. Free samples and more technical details are available directly from Dallas Semiconductor. Cost is in the $1 to $3 range, depending upon the chip features and complexity. For our contest this month, just tell me something off-the-wall you would do with an electronic dog tag. There should be all of the usual Incredible Secret Money Machine book prizes, with a great all-expense-paid (FOB Thatcher, AZ) tinaja quest for two go- ing to the very best of all. As usual, send your written entries to me here at Synergetics, and not to Radio-Electronics editorial. New tech lit From SGS a new Power Modules Databook on high-power transistors, Darlingtons, diodes, and MOSFET ar- rays. From Siemens , their Optoelectronics Data Book on all the usual LED lamps, arrays, sensors, couplers, and photodiodes. From Waferscale Integration a new data book on High Performance CMOS Memory. A really exciting new integrated cir- cuit that I've yet to do anything with is the Philips SAA7199 digital encoder. It accepts RGB computer inputs and outputs full NTSC or PAL broadcast- quality video. Included is a full gen- locking capability and a powerful computer interface. Wow! You might find the free Personal Engineering trade journal of interest. It mostly covers high end CAD/CAM software and circuit layout programs. The American Voice I/O Society, otherwise known as AVIOS, does ex- actly what you'd expect them to. They also put on seminars on speech synthesis and recognition. A freebie folder full of electronic tubing samples is available through Markel who stocks everything from shrink tubing up to a very high tem- perature sleeving. One collection of books on energy management, air conditioning, and humidity control, is available through the Business News Publishing Company. For the fundamentals of digital inte- grated circuits, do check into my classic 77L Cookbook and CMOS Cookbook. Autographed copies are available from my own Synergetics. My newest Book-on-demand Re- source File should also be ready by the time you read this. R-E CIRCLE 108 ON FREE INFORMATION CARD LEARN vril CLEANING/MAINTENANCE/REPAIR EARN UP TO $1000 A WEEK.WORKING PART TIME FROM YOUR OWN HOME! THE MONEY MAKING OPPORTUNITY OF THE 1990'S IF you are able to work with common small hand tools, and are familiar with basic electronics [i.e. able to use voltmeter, understand DC electronics). . , . IF you possess average mechanical ability, and have a VCR on which to practice and learn. . . .then we can teach YOU VCR maintenance and repair! FACT: up to 90% of ALL VCR malfunctions are due to simple MECHANICAL or ELECTRO -MECHANICAL breakdowns! FACT: over 77 million VCRs in use today nationwide! Average VCR needs service or repair every 12 to 18 months! WejO'sMO PAGE TRAINING MANUAL (over 500 pho- tos and illustrations) and A WARD- WINNING VIDEO TRAINING TAPE reveals the SECRETS of VCR mainte- nance and repair— "real world" information that is NOT available elsewhere! Also includes all the info you'll need regarding the BUSINESS-SIDE of running a successful service op- eratl0n! FREE INFORMATION CALL TOLL-FREE 1-800-537-0589 Or write to: Viejo Publications Inc. 5329 Fountain Ave. Los Angeles, CA 90029 Dept. RE O < m co m a L CO CO 83 CIRCLE 181 ON FREE INFORMATION CARD p / 1 SIMPLE FM TRANSMITTER ' T/i/s handy FM transmitter makes a great one-evening M project, even for first-time builders! _ *• JAMES A. MELTON THERE IS NO THRILL LIKE THE THRILL you get from operating equip- ment you have built yourself. If you have never built a project from a magazine before, let this FM transmitter be your first — you'll see how much satisfaction and fun you can have! The FM transmitter is de- signed to run from a 9-volt bat- tery and is made from readily available parts. The authors pri- mary use is as a baby monitor, but the uses of a transmitter like this one are almost limitless. It is very sensitive, and easily capable of picking up a conversation in any part of a room. The dimen- sions and values given here will allow static-free reception within the perimeter of most homes. No license is required for this transmitter according to FCC regulations regarding wireless microphones. (The emissions must stay within a band of 200 kHz, its output between 88 and 108 MHz, and the field strength of the radiated emissions must not exceed 50 ^V/m at a distance of 15 meters from the device.) If powered from a 9-volt battery and used with an antenna no longer than 12 inches, the transmitter's radiated power will be within the FCC limits. The FCC takes a dim view of persons operating out- side the legal power limits, so please do not substitute any com- ponents in this circuit which would alter the output power. Circuitry Take a look at the schematic in Fig. 1. Audio is picked up from the room by an electret micro- phone and amplified by Ql. Re- sistors R2-R5 set up the DC operating bias of Ql. Capacitor C3 serves to improve the AC re- sponse to the audio voltage, and C2 blocks the DC bias and cou- ples the AC to the next stage, where the RF action takes place. The amplified AC voltage from Ql is routed to the base of Q2. Tran- sistor Q2 and associated circuit- ry (C5 and the inductor) form an oscillator that operates in the 80-130 MHz range. The os- cillator is voltage-controlled, so it is modulated by the audio voltage that is applied to the base of Q2. Resistor R6 limits the input to the RF section, and its value can be adjusted as necessary to limit the volume of the input. That will help control the amount of distor- tion you have on very loud in- puts. Resistors R7-R9 set the DC operating bias of Q2. another 2N2222 that's used as the os- cillator and modulator of the transmitter. Capacitor C5 is a 6-50 pF trimmer capacitor that's used to tune the oscillator tank circuit, and C4 routes the RF from the oscillator to ground to prevent unstable operation. Construction The FM transmitter is built on a piece of perforated con- struction board with 0.1-inch hole spacing. Component spac- ing is not critical, but placement is. You should place the compo- nents on the board in a layout that is similar to the prototype shown in Fig. 2. Generally, you will also want to make the trans- mitter as small as possible. Let's start from the left side of the schematic and work to the right. You'll want to cut out a piece of perfboard that is 12 holes wide and 30 holes long. That will give you plenty of room to work with, but still produce a small unit. First lay out two power lines on the board with bare wire; the positive supply from the battery will be on top, and the negative (ground) will be on the bottom. A IK resistor (Rl) supplies the bias voltage for the microphone. Remember to install the resistor vertically, next to the positive supply line, and bend the other end of the lead to the board. Go through the board and down to- ward the ground bus. Now insert the microphone leads into the 84 R-E Engineering Admart MIDI ProjMtlft MIDI PROJECTS BP182 — MIDI interlacing enables any so equipped instruments, regardless of the man- ufacturer, to be easily connected together and used as a system with easy computer control of these music systems. Combine a computer and some MIDI instruments and you can have what is virtually a programmable orchestra. To order your copy send $6.95 plus $2.50 far shipping in the U.S. to Electronic Technology Today Inc., P.O. Box 240, Massapequa Park, NY 11762-0240. Rales: Ads are 2W x 2W. One insertion $995 each. Six insertions $950 each. Twelve insertions $925 each. Closing date same as regular rate card. Send order with remittance to Engineering Admart, Radio-Electronics Magazine, 500-B Bi-County Blvd. , Farmingdale, NY 11735. Direct telephone inquiries to Arline Fishman, area code-1-516-293-3000. FAX 1-516-293-3115. Only 100% Engineering ads are accepted for this Admart. HIGH POWER AUDIO AMPLIFIER CONSTRUCTION High Power Audio Ampllllnr Conitmclion BP277— Here's background and practical de- sign information on high power audio ampli- fiers capable of 300 ±400 watts r.m.s. You'll find MOSFET and bipolar output transistors in inverting and non-inverting circuits. To order your copy send $6.25 plus $2.50 for shipping in the U.S. to Electronic Technology Today Inc., P.O. Box 240, Massapequa Park, NY 11762-0240. FCC LICENSE PREPARATION The FCC has revised and updated the commercial license exam. The NEW EXAM covers updated marine and aviation rules and regulations, transistor and digital circuitry. THE GENERAL RADIOTELEPHONE OPERATOR LICENSE - STUDY GUIDE contains vital information. VIDEO SEMINAR KITS ARE NOW AVAILABLE. WPT PUBLICATIONS 979 Young Street, Suite E Woodbum, Oregon 97071 Phone (503) 981-5159 Dept. 50 CIRCLE 183 ON FREE INFORMATION CARD 1ECTRET MICROPHONE R9 220O. SEE TEXT FIG. 1— FM TRANSMITTER SCHEMATIC. When powered from a 9-volt battery and used with an antenna no longer than 12 inches, the radiated power will be within the FCC limits. ANTENNA TRIMMER CAFftCrroR HAND-MADE COIL MICROPHONE HAND-MADE CAFftCITOR FIG. 2— THE AUTHOR'S COMPLETED PROTOTYPE. Notice how the antenna is soldered to the coii, about 2 turns from the transistor side. board, making sure that the ground lead of the microphone can be soldered to the ground bus on the board. Route the lead from Rl to the positive lead of the mi- crophone and solder it. The 10-u.F capacitor, CI, should be placed in the middle of the board, oriented as shown on the sche- matic, and soldered to the micro- PARTS LIST All resistors are Ve-watt, 5%. R1, R6— 1000 ohms R2— 15,000 ohms R3— 6800 ohms R4— 10,000 ohms R5, R7 — 4700 ohms R8— 2200 ohms R9— 220 ohms Capacitors C1, C3— 10 u-F, 25 volts, electrolytic C2— 2.2 uP, 25 volts, electrolytic C4, C7— 0.1 u.F, 25 volts, ceramic C5— 5-60 pF trimmer C6— hand-made capacitor (see text) Semiconductors Q1, Q2— 2N2222 NPN transistor Other components L1 — hand-made coii (see text) Miscellaneous: perforated con- struction board, 9-volt battery, bat- tery clip, eiectret microphone, 24- gauge insulated wire, bare wire, solder, etc. phone/Rl junction. This project requires two hand-made parts — coil LI and capacitor C6 — but you make both of them yourself using only wire and a common pencil for a coil form. The inductor is made by winding two pieces of 24- gauge insulated wire, laid side by side, around a pencil six times. Remove the coil you have formed and unscrew the two coils apart from each other. One of these coils, the better-looking of the two, will be used in the tank cir- cuit (LI) and the other can be continued on page 99 z 9 m CD m XI ID 85 AUDIO UPDATE OEM, custom models, and private labels: Inside marketing information for the audio consumer. LARRY KLEIN CO g z o o 5 < IX Several months back I had a small adventure that may serve as a cautionary tale. It all started when my almost-20-year-old washing machine had a final, unfixa- ble breakdown. My wife researched the new machines in Consumer Re- ports and decided on a Maytag. We went shopping at Trader Horn, a large discount appliance store, where we selected a Maytag that seemed to have the features we wanted in our price range. Before handing over our plastic, we reaffirmed with the sales- man that the store would refund the difference if we found our chosen ma- chine advertised elsewhere at a lower price in the next 30 days. Several weeks later, I came across a Maytag catalog in another store and idly leafed through it looking for our washer. Its model number and specif- ic combination of features was nowhere to be found, although all of the other machines bore a family re- semblance to the one we bought. Puzzled, I called Maytag's 800 number and was told that my washer was a "special-order unit" and not part of the other Maytag line. In a flash, it all became clear — and dem- onstrated that I can be as naive as the next guy when shopping outside my areas of experience and expertise. Custom models vs. house brands Many years ago I became aware of a marketing technique in the audio industry that I found slightly offensive from my holier-than-though perspec- tive of the time. Several of the largest phono-cartridge manufacturers were marketing their high-end cartridges under special model numbers to large audio dealers and chains. The idea simply was to prevent com- parison price shopping by au- diophiles seeking discounts. Stores selling a Stanton, or a Shure, or an Audio-Technica with special model numbers could easily guarantee that you couldn't buy the same model elsewhere for less. The custom-label- ing technique provides the dealer with a proprietary house model that nevertheless has the advantage of bearing a well-known manufacturer's name. The true house brand works some- what differently. For example: Many large discount audio dealers have found it profitable in the past to mar- ket their own brand of speaker sys- tems that usually do not bear the store's name. Speakers are es- pecially suitable for that ploy because they are a "blind" item. That means there's no way for a layman, even if he peeked behind the grille cloth, to judge the quality — and hence the costliness — of the drivers (and crossover) housed in the enclosure. And since audio neophytes fre- quently can't tell good sound from bad, cheap inferior designs can be sold at large fictitious discounts, which nevertheless provide a far high- er profit margin than the standard brands. A manufacturer of private-label speakers once complained to me that each year when his contract ex- pired, his major dealer would seek a new, lower price on the product. And the manufacturer, if he wanted to con- tinue doing business, had to further cheapen the system. The resulting deterioration in sound didn't bother the dealer as long as the external appearance of the system was pretty much maintained. Occasionally, you could have a quasi-house-brand situation where a speaker brand might be sold nation- ally under its own name, but a large dealer or chain might have an ex- clusive in their own selling area. That brings up the question of limited dis- tribution — which I'll discuss later. OEM The term "original equipment man- ufacturers" originally referred to parts suppliers who provided the resistors, capacitors, and other components used by manufacturers in their prod- ucts. The term has broadened to in- clude those manufacturers who supply complete products with the brand label — and front panel— of your choice. At one time, when my wife was involved in use-testing VCR's for Videoplay magazine, she happened to have for testing VCR's from Quasar, Panasonic, and Magna- vox. Despite the fact that their front panels, knobs, and pushbuttons were all different, once the top covers were removed, it was obvious from the identical innards that they all came off the same (probably Mat- sushita) assembly line. (The fact that each of the three machines per- formed differently at the slow speed was almost certainly the result of ran- dom alignment and QC differences rather than circuit differences.) A number of former American brand names are now owned by Japa- nese, Taiwanese, and Koreans, who are producing quite creditable equip- ment under those names. I know of one U.S. manufacturer who pro- duces his limited production, big-tick- et items at home and farms out his receivers and other mass-market items to Far-Eastern factories. Other U.S. -owned brand names are all pro- duced overseas but with the cosmet- ics, features, and sometimes the circuitry specified here. Fair trade A now-obsolete term, a "fair traded" component was one that the dealer was not allowed to sell for less than the manufacturer's list price. De- clared an illegal practice about 10 years ago, fair trade was replaced by various limited distribution schemes. In order to maintain control of the products' retail prices, the manufac- turer would sell only to dealers who were also concerned with maintain- ing a no-discount policy on the prod- uct. A manufacturer has the right to sell only to those dealers who con- form to certain criteria (demo facili- 86 ties, salesperson competence, quali- ty image, etc.), but a no-discount policy was not something that could be legally demanded. Over the years, all this has engen- dered a number of dealer-manufac- turer lawsuits, with the dealer usually doing the suing. I testified as an ex- pert witness in one case where a lim- ited-distribution Cat the time) Japa- nese manufacturer was being sued by a large audio retailer. The retailer's claim was that the manufacturer's representative had promised him the line and taken a large order, but it was never delivered because he dis- covered that the retailer also owned a discount-appliance operation. The dealer was suing for $100,000 in damages because he claimed that he kept a section of his store empty awaiting the arrival of the ordered equipment and lost substantial sales as a result How did I get into the act? The manufacturer's lawyers wanted me to testify that the dealer could have filled his shelves with other brands of quality equipment that would have sold just as well. In other words, I said to the lawyers, you want me to say that the equipment under dispute was good, but nothing special. They nodded. I told them that I would be happy to testify to that effect, since that's exactly what I had been telling the company sales manager for years. In any case, I did my expert witness number at the trial — and the judge ruled against us. The manufac- turer subsequently won on appeal without my help. r-e ELECTROMAGNETICS continued from page 69 L=*/l = (/B-ds)/l(H). Since B may not be constant across the area, we sum each infi- nitesimal contribution by inte- gration. Note that we're con- cerned with the flux through the enclosed area, not the total flux through a Gaussian surface en- closing the loop, which is zero. For simple materials, L is inde- pendent of I since the equation B - |j.H is proportional to I. How- ever, L is dependent upon the area since the equation /Bds de- pends on the total area being summed. The inductance (L) is also dependent on u~ We can use Ampere's law to see that effect. In empty space, M = and there are no bound currents, so we can say VxH=Vxb/ H l = J, and V-H=V-B=fl. With a simple material filling space, H = B/mu, so VxH = VxB/u,=J ( and V-H = V-B/u,=0. Since the divergence and curl of the field completely characterize the fields, B is larger by pJ\L = u, r in a filled inductor. In our next article, we'll look at the effects of electric and magnet- ic fields as they change with time. We'll see that these fields are so closely related to each other that they lead to a single electromag- netic field. R-E Try the M m ~Mflri>.hti electronics bulletin board system (RE-BBS) 516-293-2283 The more you use it the more useful it becomes. We support 1200 and 2400 baud operation. Parameters: 8N1 (8 data bits, no parity, 1 stop bit) or 7E1 (7 data bits, even parity, 1 stop bit). Add yourself to our user files to increase your access. Communicate with other R-E readers. Leave your comments on R-E with the SYS0P. RE-BBS 516-293-2283 Start Making Waves. j-XWC* rxaxELX]** ^2 r - 1, """i i# © t Switch to B+K PRECISION for the right function generator at the right price. Don't let tight budgets keep you from the function generator performance you need, B+K PRECISION has the industry's most complete line of cost-effective generators. ..nine in all. All are rugged lab-grade instruments that will perform as promised, every time. Here are just two examples. 13 MHz Universal Function Generator with Frequency Counter ■ 0.1 Hz to 13 MHz output ■ Sine, square, triangle, ramp, pulse, triggered, gated burst, TTL outputs ■ Two built-in generators can be used independently or together for AM or FM ■ 1000:1 sweep range ■ Variable symmetry for unlimited waveforms Built-in 30 MHz frequency counter 2 MHz Function Generator ■ 0.2 Hz to 2 MHz ■ Sine, square, triangle, ramp and TTL or CMOS output ■ Four-digit frequency display ■ Variable DC offset ■ Variable symmetry Model 3040 *1, 195 Model 301 IB $25900 For more information on the complete line of B+ K PRECISION function generators or for immediate delivery, contact your local distributor or B + K PRECISION, KlAl5 CIRCLE 53 ON FREE INFORMATION CARD PREVENT descram bier detection & damage! Order Tech-Block today! Simple in-line connection. Only $19.95 P. P.O. THE STAGE DOOR VIDEO, PO Box 518. Belleview, FL 32620, For C.O.D.'s 1 (800) 395-4557. COMPUTERS AT/XT compatible systems and components at discount prices. Catalog $2.00, re- funded with first order. MPS ENTERPRISES, Box 1048, Lemon Grove, CA 91946. ANTIQUE RADIO CLASSIFIED Free Sample! *Sb3£&&&& Antique Radio's Largest Circulation Monthly. fflfffi j Articles, Ads & Classifieds. 6-Month Trial: $15. 1-Yr: $27 ($40-1st Class). A.R.C., P.O. Box 802-L9, Carlisle, MA 01741 Ui O Z o rr P o uj _' 6 < LAND/general mobile radios, CB's, scanners, radar detectors, auto alarms, marine trans- ceivers catalog $2.00. RAY'S, Sox 14862RE. Ft. Worth, TX 76117-0862. PLANS AND KITS DAZER personal protectors! Lasers! AM/FM/ln- frared transmitters! Detectors! More! Kits/as- sembled. Catalog $2.00. QUANTUM RESEARCH, 16645-113 Avenue, Edmonton, Alberta T5M 2X2. SURVEILLANCE transmitter kits tune from 65 to 305 MHz. Mains powered duplex, telephone, room, combination telephone/room. Catalog with Popular Communications, Popular Electronics and Ra- dio-Electronics book reviews of "Electronic Eavesdropping Equipment Design," $2.00. SHEFFIELD ELECTRONICS, 7223 Stony Island Ave., Chicago, IL 60649-2806. DESCRAMBUNG, new secret manual. Build your own descramblers for cable and subscription TV. Instructions, schematics for SSAVl, gated sync. sinewave, (HBO. Cinemax, Showtime, UHF, adult) $12.95, $2.00 postage. CABLETRONICS, Box 30502R, Bethesda, MP 20824. HOB B Y/broadcasti ng/H AM/CB/surve i llance trans- mitters, amplifiers, cable TV, science, bugs, other great projects! Catalog $1.00. PANAXIS, Box 130- F1 1 , Paradise, CA 95967. __ BUILD our picture only, satellite TV deserambler for most channels. Uses 6 transistors and 4 chips. Most parls from Radio Shack. For educational purposes only, not to be used illegally. Circuit board and plans $30.00 U.S. funds. Circuit board, plans, and parts kit $89.00 U.S. funds. Build a super high economy carburetor, to make eight cylinder engines run on I ess tha n one gallon of g asoli ne per hou r. Pla ns tor 5 types $20.00 U.S. funds. Cheque, money order or Visa welcome. Order from VALLEY MICROWAVE, Bear River, Nova Scotia. Canada BOS 1B0. Tel. (902) 467-3577 8 to 4 eastern time. Fax: (902) 467-3937 anytime. REMOTE CONTROL KEYCHA1N Co m p tete w/ml n Mr a nam itter'-: : and +5 vdc RF receiver!;: Fully sesembled .including plaits' to build your.dwn auto alarm .!.- Ouanlity discounts available tfolt f\t Check, Visa dr.M ? C- : 5>Z4.yD.;:;A CONTROL your world with your computer! Com- plete plans, schematics, programs, only $12.95 check/m.o. ICDS, Dept-B, PO Box 265. Plainwell. Ml 49080. BUILD your owm compact stereo amplifier. Com- plete PCB artwork and parts list. !C-based, few external components, excellent frequency re- sponse. $9.25 EZ-CIRKITS, PO Box 150196, Arlington, TX 76015. CHRISTMAS lighting controller project, controls up to 24 sets of midget lights, 8 a.c. SCR-controlled channels, MC68705P3 microcontroller, 100s of pre- programmed patterns, great with music. Complete kit: $79.00 (US) or $84.00 (Canada), board and microchip for $39.00, includes S&H. Quickly shipped, CANTEK, 19 W. Water St., Canonsburg, PA 15317. (412)745-6760. TUBES - 2000 TYPES DISCOUNT PRICES! Early, hard-tc-Rnd, and modern tubes. Also Iransformers, capacitors and parts lor tube equipment. Send $2. CO tor 28 page wholesale catalog. ANTIQUE ELECTRONIC SUPPLY S221 S. MaDle Ave. • Tempe. AZ 85233 » 602-820-5411 . INVESTIGATORS, experimenters — Quality new plans. Micro and restricted devices. Free catalog. Self addressed stamped envelope required. KEL- LEY SECURITY, INC. Suite 90, 2531 Sawtelle Blvd., Los Angeles, CA 90064. DESCRAMBLER kits. Complete cable kit $44.95. Complete satellite kit $49.95. Add $5.00 shipping. Free brochure. No New York sales. SUMMIT RE, Box 4B9, Bronx. NY 10465. PCB and schematic CAD. $195,00 IBM EGA CGA Multilayer, rubberband, autovia, NC drill, laser, dot matrix, plotter, library, Gerber, AUTOSCENE, 10565 Bluebird St., Minneapolis, MN 55433. (€12) 757-8584 free demo disk. VIDEOCIPHER II; scanner/cable, satellite modifica- tions books. Catalog $3.00. TELECODE, PO Box 6426-RE, Yuma, AZ 85366-6426. __ DIGITAL recorder. Digitally record any audio source with special effects. Microprocessor con- trolled device. Detailed plans. $9.75: T. ZURAW, Box 341, Dearborn Hts, Ml 48127. REMOVE VCR copy protection, PCB PAL instruc- tions $16.50 w/P&H. LOGICAL CHOICE, Box 1256, Lomita, CA 90717. PROTECT your home for pennies. Alarm kit. As- sembles in one night. Thousands already installed. Also receive bookTel "How to Install an Alarm Sys- tem in Your Home." $24.95: NOBLE ELEC- TRONICS, 17 Farmington Avenue, Suite 169, Plainville, CT 06062-1726. LIGHTNING arrester for TVs, VCR's, stereos. Build your own that's better than store bought for about $25.00. Designed and tested in Central Flori- da with amazing results. For detailed instructions, send S6.00 to MARK RYAN, 529 Marigold Ave., Orlando. FL 32807. BIOMEDICAL ELECTRONICS BIOMEDICAL letter covers medical electronics, anatomy, equipment functions, eiectrical safety, troubleshooting. PNP PUBLISHING, Box 333, Brooklyn, NY 11 204. (718) 837-9349 extention 55. 96 SATELLITE TV FREE catalog — Lowest prices worldwide. SKYVI- SION, 2009 Collegeway. Fergus Falls, MN 5SS37. 1 (800) 334-6455. (See full page ad The Shopper section), VIDEOCYPHER II descrambling manual. Sche- matics, video and audio. Explains DES, Eprom, Clonemaster, 3Musketeer, Pay-per-view (HBO, Cin- emax. Showtime, adult, etc) $16.95, $2.00 postage. Schematics for Videocypher Plus, $20.00. Sche- matics for Videocypher 032, $15.00. Collection of software to copy and alter Eprom codes. $25.00. CABLETRONICS, Box 30502R. Bethesda. MD 20824. FREE catalog — Compare our prices for new sys- tems and upgrades. Latest receivers and dishes — all top brands. ALPHA SATELLITE DIST,, PO Box 197A. Hawthorne, NJ 07507-0197. 1 (800) 535-AL- PHA, PAY TV AND SATELLITE DESCRAMBLING ALL NEW 1991 EOITI ON Cibie. twiless and salrjililj. Only Si J 95 Olher pa/ TV eaician-s. Vol 1 (-Basics ot AH Systems} SI 4 U5 1989 Etfrt-a-n EK35 Build HtBlltitsyaltms under S60C S12.9& Wireless Cable Handbook S9 33 Any MW95 or 5&M 95. Scrambling Nrjurs Mcnttviy haa ai; In1g onthnflfw 'P'-a nVa - <\a disej ambltTrs which em- ulUe B-Mac, VCIF. Plus. Ofion S19 9!*vr New dialog S1 SpecBtltMsmanlh- Everything mtludmg video an-i subscription for S&4 95 ScrjiiiUlunj News, 155ZA Hertel Ave. r Bulfslo. NY. 14216. For COD'S [716) 874-ZOflB WANTED INVENTIONS, new products, ideas wanted: call TLCI for free information/inventors newsletter. 1 (800) 468-7200 24 hours/day - USA'Canada. INVENTORS: We submit ideas to industry. Find out what we can do for you. 1 (800) 288-lDEA. INVENTORS! Your first Step is important. For free advice, call ADVANCED PATENT SERVICES, Washington, DC, 1 (800) 458-0352. CABLE TV DESCRAIY1BLERS • CONVERTERS* and ACCESSORIES. "7 111 PANASONIC, JERROLD, OAK, PIONEER, SCIENTIFIC ATLANTA AND MORE. LOWEST PRICES. FREE CATALOG. CABLE READY COMPANY (800)234-1006 BUSINESS OPPORTUNITIES YOUR own radio station! Licensed/unlicensed AM, FM, TV, cable. Information $1.00. BROADCAST- ING, Box 130-F11, Paradise. CA 95967. LET the government finance your small business. Grants/loans to $500,000. Free recorded message: (707) 449 -fl 600. (KS1) MAKE SS$! Become an American electronics deal- er! Profit opportunities since 1965. Call SCOTT PRUETT, 1 (800) 872-1373. CABLE TV DESCRAMBLER LIQUIDATION! FREE CATALOG! Hamlin Combos $44, Oak M35B $S0 (mln. WEST COAST ELECTRONICS For Information: 818-709-1 75B Catalogs & Orders: 800-628-9656 Cable TV Descrambler Kits Universal Kit $55.00 Includes all pans and PC Board Not included is the ac adaptor or enclosure. Tri-ModeKit $39.00 induces all parts. PC 3-2 arc and AC Adaptor, Not Included is trie enclosure. SB-3 Kit $29.00 Includes all pans, PC Board and AC Adaptor. Not included is the enclosure Universal Tutorial $9.95 Includes on in depth study ol the tecnonolagy used and has c roue I esh acting hints, Tri-Mode Tutorial $9.95 Includes a gate sy gate study ci the circuit and has troubleshooting pints. Call Toll Free 1 -800-258-1 1 34 COD Only M i G Electronics, Inc. 72 Orange St., Suite 216 Providence, Rl. 02903 CIRCLE 197 ON FREE INFORMATION CAR D MARK V €L€CTRONICS, INC. Competitive Pricing * Fast Shipping Since 1985 IN CA 1-800S21-MARK (orders only) OUTSIDE CA 1-800 423-FIWE (orders only) ORDER BY FAX (213) B8S-6858 CATALOG & INFORMATION 12131 888-8988 A indicates the level of difficulty in the assembling of our Products. A Beginner A A intermediate AAA Advanced * Fully Assembled \ rBBLSRwr mot* cab;™ l WM 323A TA-802 J^~ M TA-IS00 TA-a$qo TA-MOUXi Special otter will be given to the purchase of Amplifier * Metal Cabinet + Power Transformer! amplifiers kit akeml MISCELUUIEOUS KIT ASSEM8. MODEL DESCRIPTION TA-HMK2 DhMJI VfK* Mimt A A S 30 W TA-50A.B Mtilti'PururjrjiUKKlvGtfiEri^rA 12 54 1720 TA-5QC VdlE i' PtrpoH VeaOt I Mjapy BnlMif Wnidmg Mjr £ n m 1 Ginirjlor a 1 3 65 1 B t 1 MODEL OESCniPTJOM TY-JM 3Crunn«CfllOTL>QWCofllronfi • S SttOO MLttCOvnirDigfliiCBKiiA "9 00 fSft TY-3B. 4aunfl. Tr^rth. CanirDt S*¥IeH a lj 00 TY-^ilMliV Irtnrrt flemoiEContiElUn.!:i*'CiHi AAA 7300 35 00 PM? Sit j Pa :.F.ri UcIei AA ?J :b ^ 11 1Y-43 SH L%nit46 PjreI Uc»i A !}» JIM "t -i^ ?0&l*oiS3r 'CalAufla'-fht U.sjii. Aa >3 i!i 4£ 14 ry-4? Suptr-arficLiromc \>.au)t\tt A A . 1^4B 77 S4 01 & l0KHJii r flOvCCCipjDl3r,-A36i)O M-Af! TAlOOOA TASK! ;30E oi r B ?m u\ sev dc cspilich i ta -He rfr 1 ?0M«i ■* oo 031 NcrbEl REEiLtar Single ^ol Csnlrci i IA-3&M TJMQ7 TAlOOOA ^A :2CM»(2i 13 00 032 AlpsfinsiiFar - Dlji Vai Con^ot |TAJ77A TA-B03 TA-JJOQ. 77 00 TA-KJO JWWufli-ftirpcHSinp>t OmuwlAmp A 20 00 3400 5M-3Q3 60W i WW 5t*iM f*CW Ampirhe iwtti Ms irtpyi i a* 73 00 BSD* T* ■ &3A 30W X Z 5r#eo Pre- mim Amp A 31 50 4? 90 1 A-377A siala or i v AM fully GornrrtiTrwitMY Srrri T •'■"•■ ^ f (1 tv Air P a a a H 91 '5 00 TMC0 JCfWSDHStilnMciiciAnnp A 2fl 00 34 90 TA477 1JBW Waste Prwn'MiKiBAmt) A A SB 00 B4EC SM 72B 1 20W - 1 20W A&DC SIe.eq M-f i A Fr«-Mun At j: A A B 00 B9 CO TA-U0MK2 l?|^ *12QW^N Tin Pn-Mui Stern PadrErAfiip AA 5393 TAWS Bi^*IWWt\r(fXSr*!»W»*iPo-cArn AA 4S34 M F3 TA-lQOOA irxWE^ntmcam'A-MlinPwtrMonoAnrtpAA 5000 6500 TA-15O0 ICWXJBBlW-DCSIirWPri-MMlAffla AAA 7} 70 B 51 TA-32W DC FEE Sujw r Cliis A DC Prr Amp AAA 4J 7B HI ?■* TA'3500 htO Pra'Amrj-*. , 10 t*nfl rjrjp,irr: EipiliJir * .1?r"3. 3' 1?' r" TA7B00. TA-377A TA'3Z00 S33B5 LG-1634 4- IE. 8' TA-323A TA-37?A. TA-Z2D0 J5 50 L&1934 4' 19' H'> TA-aiS IA-1M0.TA.-120MK? TA-MOMW TA-tfXOA 34 50 LS-1M& 5 - n 1T 1J > TA.J77.TA-Jffll-ttJa TA-tSBQ TA-SOOOA. TA-3SW 38 DO LG-1M3 IWtf f TA-377A.TA-2B00.TA-23O0,TrA-1ZOMH2 30 50 mniRNftvoMni Ortn'UpfTmANBCOuWIilt WT ASSim MODEL DE3CRIPTI0H MATtHIMG PFtltf 001 2BV i 2 6A la JBV » 3 6A TA'SM M<3 TAB03 TA TBOOA TA-^M S2SC0 003 3EV:-3 3A T«- 501. TA-32'JA TA-400 TA-300 Tft.JITA 23 DO SM-43 3» Murii-^ntlHsnjl Ltd D P M iwABS pt»T>C WCl A A $ J-* i-J S *3 0O SH-44 < l ^Hi- T 'fWi»n13PWAAA 38 M «00 5M *$* * ' '■ Hi ■ Pi f r, -i J > p p U (v. .'A95 PtiiliC Mil 1 A A A 4 1 20 53 00 5M-49 3'^MullhFunClKHWLCDD.HP Lw/HOlfJ FoMlflMAA 36 M 44 50 SH-100 tSBHL OhJhUI FrtrSiency Gr>umirAAA ?9W WOO 005 2EV»21A _ R .];.:={! 17 DO DOG 18V" 2 5* in-355A 17 00 O0J 53VX2SA TA-3600 45 00 Mon Ihnj Fn 9 30 am To 5 00 p*" «w^j-9»**vj»^-t(Ma^-*^'«pa^e»^t*tW7- i -ait^F> Sat ia 00 am to 6 00 pm MARK V ELECTRONICS, INC. -8019 E. Slauswn Ave, Montebello, CA 90640 — E3 H CIRCLE 93 ON FREE [NFORMATIQN CARD 1 m — ^ EC 97 WE HAVE THE MOST ADVANCED TECHNOLOGY IN CABLE EQUIPMENT: • BASE BAND • JERROLD • PIONEER • TOCOM • HAMLIN • ZENITH • SCIENTIFIC ATLANTA • OAK For out of this world prices call WORLDWIDE CABLE 1800-772-3233 FREE CATALOG AVAILABLE 7491 D5 N. FEDERAL HWY., SUrTE 142 BOCA RATON, FL 33487 39I /COD /m^ NO FUJBDA SALES CIRCLE 192 ON FREE INFORMATION CARD 3 FORI SPECIAL ON SUB-MINIATURE VOICE FM TRANSMITTERS. KITS CONTAIN PC BOARDS y z o rr h- o LU o 3 < V ~ . •FMX-1 LONG RANGE (3 Ml) ULTRASENSITIVE FM VOICE XMTR with fire tune, range control plus $34.50 A ^1^ •TELX-1 TELEPHONE FM XMTR (3 Ml) auto- matically operates when phone is used. Crystal clear clarity with fine tune and range control. Non delectable S34.50 "ATR-1 AUTOMATIC TELEPHONE RECORDING DEVICE tapes telephone conversation all automatically $19.50 ALL THREE Of ABOVE FOR : $69.50 CALL OR SEND VISA, MASTER CHARGE, MONEY ORDER. ETC. TO AM AZING CONCEPTS, BOX 716, AMHERST, NH 03031. (603) 673-4730. FULL- OR PART-TIME JOB BUSINESS : Learn VCR repair! Professional -level home study program. Master easy-to-leam, high-profit repairs without investing M in costly high-tech instru- ments. Send or call today. Free career kit: , 800-223-4542 *2 Address _ City _Zip_ The School of VCR Repair, Dept.VM342 2245 Perimeter Park, Atlanta, GA 30341 MAKE $75,000 to $250,000 yearly or more fixing IBM color monitors (and most brands). No invest- ment. Start doing it from your home. (A telephone required.) Information, USA, Canada S1 00 cash. US funds, other countries $8.00 RANDALL DIS- PLAY, Box 2168-R, Van Nuys, CA 91404 USA. Fax (818) 990-7803. EASY work! Excellent pay! Assemble products at home. Call for information (504) 641-8003 Ext, 5192. ELECTRONIC ASSEMBLY BUSINESS Stan home, spare lime. Investment knowledge or experience unnecessary. BIG DEMAND assem- bling electronic devices. Sales handled by profes- sionals. Unusual business opportunity. FREE: Complete illustrated literature BARTA RE 00 Bun 24S Walnut Craeh Calif. 94597 DESCRAMBLERS CABLE TV EQUIPMENT GAIL TOLL FREE 1-800-228-7404 [coJ| OUKTODvCJSW HOOF mm » day monty back SWgtff you wort fw m uses h cut mSMB WE CARRY ALL MAJOR BRANDS BEST PRICE BEST THE C0NHBCTIOH FOR MORE ^FORMATION call oe ware 1-512-25(^031^^ **° I Wit tvVvUV Iffl, eg,. „, hmh ihuu m „ HOME assembly work available! Guaranteed easy money! Free details! HOMEWORK-R, Box 520. Danville, NH 03B19. MONEYMAKERS! Easy! One man CRT rebuilding machinery. $6,900.00 rebuilt. $15,900.00 new. CRT 1909 Louise, Crystalake. IL 60014. (815)459-0666. Fax (815) 477-7013. RECESSION? Thriving fully equipped audio/video repair shop $t30K + this year! Proven 40% + gross last three years. $70,000.00 cash. AUDIOTECH, 256-B North Highway 101. Encinilas, CA 92024. FAX (619) 944-0345, Phone (619) 944-9048. 7 \ * * * * PRESENTING * * * * CABLE TV DESCRAMBLERS ***** STARRING ***** JCRROU), HAMULI N, OAK AND OTHER FAMOUS MANUFACTURERS • FINEST WARRANTY PROGRAM AVAILABLE • LOWEST RETAIL I U/HOLESALE PRICES IN U.S. • ORDERS SHIFTED FROM STOCK WITHIN 24 HFC • ALL MAJOR CREDIT CARDS ACCEPTED FOR FREE CATALOG ONLY l-SOO-545-8927 . FOB ALL INFORMATION t-€ 1 8-709-993 lj PACIFIC CABLE CO., INC. 7325 Vi Reseda Blvd.. Dept-2108 Reseda. CA 91335 RECOVER pure gold from scrap circuit boards, electronic parts. Easy methods. Send $5.00, RECY- CLING, Box 11216PE, Reno. NV 89510-1216. EDUCATION & INSTRUCTION F.C.C. Commercial General Radiotelephone li- cense. Electronics home study Fast, inexpensive! "Free" details, COMMAND, D-176. Box 2824, San Francisco. CA94126. PRACTICE troubleshooting on your IBM PC. 32 circuits including diodes, transistors, FETs and op amps. Hundreds of troubles. Visa, MC $49.95. 3.5" or 5.25." Demo $5.00. MALVINO INC., 229 Polaris Ave., Nit. View, CA 94043. BE a recording engineer; Train at home for high paying — exciting careers. Free informalion. AU- DIO INSTITUTE, 2258-A Union St., Suite K, San Francisco, CA 94123. FREE CATALOG! 1-800-648-7938 JERROLD HAMLIN OAK ETC CABLE TV • Special Deafer Prices! ■ Compare our Low Retail Prices! • Guaranteed Prices & Warranties! • Orders Shipped Immediately! REPUBLIC CABLE PRODUCTS, INC. 4080 Paradise Rd. #15. Dept hi: lwi Las Vegas, NV 89109 For all other information (702) 362-9026 INVENTORS INVENTORS! Can you patent and profit from your idea? Call AMERICAN INVENTORS CORP. for free information. Serving inventors since 1975. 1 (800) 338-5656. CABLE TV BOXES C on verters-D esc ram biers Remote Controls-Accessories * Guaranteed Best Prices * * 1 Year Warranty - C.O.D.'s * * Immediate Shipping * * FREE CATALOG + Call or Write N AS/TRANS-WORLD CABLE CO. 3958 North Lake Blvd.* Suite 255 Lake Park, Florida 33403 1 -800-442-9333 1 -800-848-3997 98 SIMPLE FM TRANSMITTER continued from page 85 used in the next one you build. The other hand-made compo- nent, capacitor C6, is part of the oscillator feedback. To make this small value capacitor, take a 4- inch piece of 24-gauge insulated wire, bend it over double and, be- ginning ! /2-inch from the open end, twist the wire as if you were forming a rope. When you have about 1 inch of twisted wire, stop and cut the looped end off leaving about l /a-inch of twisted wire (this forms the capacitor) and Y2- inch of untwisted wire for leads. Capacitor C7, a 0.1 llF capaci- tor, is one of the most critical components in the circuit. You must place it across the L1-Q2- R9 assembly, as shown in Fig. 1. to reduce the amount of RF feed- back you'll get into the rest of the circuit. The antenna (more 24- gauge wire) should be soldered to the coil you made, about 2 turns up from the bottom, or the tran- sistor side, and should be about 8-12 inches long. Operation To use the transmitter, set up a radio in the area at least 10 feet from the project. Find a blank spot on the dial and turn the ra- dio up so you can hear the static. Connect a 9-volt battery to the transmitter and listen to the ra- dio. Slowly adjust the tank capac- itor (C5) until you "quiet" the receiver; this is the tuned spot. Note that when you remove your hands from the transmitter, you will detune the circuit some- what. It is usually best to leave it detuned, and tune the radio in to get the best reception. If you can- not get the tuning range you de- sire, you can squeeze the coils in the tank circuit closer together to raise the frequency, or pull them apart just a little bit to lower it. The circuit works best when powered by a battery, but if a wall- derived supply is needed, make certain that the ripple voltage is as low as possible, or you will get hum in the receiver. R-E The powerful 68000 Learning Tool $499.00 Powerful debugger, easy interface to PC or terminal, expansion slots, removable bread- board, logic probe, 64k RAM, 2 serial ports, experiments available, ideal for educational environment, wircwrap cards available. 30 day money back guarantee Call: (602)829-6503 I.S.S.C., 6521 S. Terrace, Tcmpc AZ 85283 BEST BY NAIL Rates: Writs National. Box 5. Sarasota, FL 34230 MONEYMAKING OPPORTUNITIES WE PAY UP to S300.00 weekly Woodburnlng Picture Frames. Everything supplied. No experience or selling. Bay Frame. PO Box 1588-;RE). Jackson, TN 38305. MAKE S2.000 MONTLY Al Home. Write to: Norton34. 1127 West Fairmont, Fresno. CA 93705, OF INTEREST TO ALL CITIZEN BAND RADIO DX. Details St. 00. CBR.Box212, Rocheiie Park, NJ 07So2. ^^_ LISA'S WEIGHTLOSS SECRET! RlngSysteml Send $3 a nd SASE: PO Box 1367 2, Si. Petersburg, FL 33733. FREE BLACK BOOKS Catalog: Wrile: PO Box 754, Con- cordvllle, PA 19331. to * QUALITY + SERVICE + SELECTION SATISFIED CUSTOMER It All Adds Up With MCM ELECTRONICS You don't need a calculator to figure out which parts supplier has the most to offer you and your business . , .just a copy of our giant new MCM Electronics Catalog. Inside, you'll find more than 17000 top-quality items from manufacturers like RCA/GE, ICO-Rally, Pioneer, Weller and others ...most ready to ship from our huge inventory within just 24 hours! But that's not all! High in-stock rates, TOLL-FREE ordering, friendly sales representatives and ready access to technical assistance ... It all adds up to even more great reasons why MCM is your best choice for al! your electronic parts needs! FOR a FREE SUBSCRIPTION to the MCM Electronics Catalog, call TOM -FRFF, 1800-543-4330. aff H «* .MCM ELECTRONICS L SPRING* 1991 a ► ■ ► KlCl^j MCM ELECTRONICS 65D CONGRESS PARK DR. CENTERVILLE. OH 4545S-4D72 A PREMIER Company Source No. RE— 73 o < m oo 99 CIRCLE 87 ON FREE INFORMATION CARD COMPUTER CONNECTIONS continued from page 93 o z o cc t- o 111 Q Q < Info and Disk Doctor programs; a file "shredder;" a smart file deletion pro- gram; and a detailed on-line help sys- tem that almost renders the manual unnecessary. Of course, you can customize which drive and tool icons are dis- played. You can also customize the NDW menus and many other as- pects of the program. Unlike Win- dows' own ProgMan, NDW supports nested program groups. NDW is not perfect, but it's much better than anything else on the mar- ket. If you buy only one Windows util- ity, this should be it. Contact Symantec Corporation, 10201 Torre Avenue, Cupertino, CA 95014-2132. (408) 253-9600. For 286 owners; Several compa- nies have been advertising 386SX adapters that supposedly provide el- egant upgrades. I've requested eval- uation units from each manufacturer, and hope to have a report next time. Book nook If you're unsure what object-ori- ented technology is about, order a copy of Object-Oriented Technology: A Manager's Guide by David Taylor. The book costs only $10, and is pub- lished by Servio corporation, where Taylor serves as Director of Strategic Planning. By reading fewer than 150 pages, you can learn the basics of inheritance, encapsulation, poly- morphism, objects, methods, class- es, class hierarchies, message- passing, et al. Contact Servio Corpo- ration, 1420 Harbor Bay Parkway, Al- ameda, CA 94501. C800) 243-9369. If your work involves PC configura- tion, you'll want to check out The Hard Disk Technical Guide by Doug- las T. Anderson. It's filled with de- tailed technical information on almost 1500 types of hard disks of all types, from dozens of manufacturers. The book also includes configuration in- formation on dozens of hard-disk controllers, SCSI and ESDI installa- tion, and BIOS drive tables. The book is constantly updated, and is cur- rently in Revision E. New purchases cost $49.95 + $3 S/H; updates to prior versions are available at lesser cost. PCS Publications, P.O. Box 10492, Clearwater, FL 34615. C800) 741-3282. Fax: (800) 446-3157. RE LETTERS continued from page 16 suit in super-miniature vacuum tubes that could compete with transistors in specialized applications. Sure, tubes require higher volt- ages, more board or chassis space, a heater power supply, and they're old fashioned. My 1965 reel-to-reel tape deck is old-fashioned too, but its 16- Hz to 35-kHz frequency response will beat most 1991 cassette decks any day. (My father is old-fashioned also, but I don't mock him and I wouldn't throw him in the trash!) It's time that the vacuum tube was put in its proper place, as the father of transistors and as the device that is responsible for the development of all modern active electronics. As a pro- fessional technician and an experi- menter, I challenge all these would-be technicians and wise-guy hobbyists who knock tubes to read and think about history, and to respect it. The Audion wasn't a dual-gate MOSFET, you know! I haven't missed a single issue of Radio-Electronics in more than a decade. Keep up the excellent work. You truly are honoring the memory and work of the late Hugo Gernsback. GREGG VAN DER STUYS Mission, BC. Canada AUDIOPHILE ATTITUDES, AGAIN As previous readers of Radio- Electronics (it has been over seven years), we were happy to receive the magazine again after a few of us elec- trical engineers decided that we wanted to share a subscription at work. Radio-Electronics truly is a good magazine. We opened up the July issue to the Letters column and read Paul J. Carl- son's letter about "absurd speaker cables," "antiquated tube ampli- fiers," and "Creation Science." The truth is that tweaking an audio sys- tem can easily make substantial audi- ble improvements — but only if you have ears! (Owning decent equip- ment also helps.) Speaker cables do sound different. Some cables sound much better than others, and some- times cheap 18-gauge zip cord might sound the best. As electrical engi- neers, the difference in sound both- ered us enough to search for an answer. Without getting into systems de- sign (La Place transforms, differential equations, Mason's Theorem, etc.), here's a brief and simplified explana- tion. Most reasonable-quality, mod- ern power amplifiers are Feedback amplifiers. Loudspeakers are trans- ducers that also act as electrical gen- erators with a very complex transfer function. An amplifier must contend with a loudspeaker's back EMF and particular transfer function. Loud- speaker cables between the loud- speaker and the amplifier also "add" their own transfer function as they have resistance, inductance, and ca- pacitance associated with them. We now have three complex transfer functions to deal with (speakers, ca- ble, and amplifier). Now, look at a schematic of a transistor (feedback) amplifier. Where does the differential input (front end) get its signal to close the feedback loop? Right from the speaker terminals that are getting "hit" with the loudspeaker's back EMF modified by the speaker cables placed in series! But that's not all that impacts on overall performance. The loud- speaker cables also modify the loud- speaker's transfer function. Neglect- ing (for simplicity) the capacitance and inductance of the cables and looking only at resistance, three very audible effects can occur. First, the series resistance modifies the "Q" factor, or tuning, of the speaker sys- tem. More series R yields a higher woofer "Q" factor, and a "warmer" or sometimes an exaggerated bass re- sponse results. Second, varying a ca- ble's resistance also shifts the crossover frequencies and phase re- sponse of a loudspeaker system. Third, the cable's series R affects the amount of interaction between driv- ers in a multi-way loudspeaker sys- tem. The back EMF from a woofer is not as easily "shorted-out," because of the cables resistance and hence can affect the other drivers. Our point is that things aren't al- ways as simple as we'd like them to be. We must keep an open mind. As we learn more, we can quantify more of the parameters associated with what makes something work, or sound, better. Until we "know it all." we can't discount the mysterious "art" part of audio engineering. FRED J. JANOSKY DONALD E. KUJAWSKI Reading, PA RE 100 CORN LECT R N I C S 10010 Canoga Ave., Unit B-8 Chatsworth, CA 91311 SINCE 1983 — YOUR I.G. SOURCE — AND MUCH MORE!! NO SHIPPING CHARGES ON PRE-PAID ORDERS!* NO CREDIT CARD SURCHARGE! SCHOOL P.O.s WELCOME! LASER DIODES STOCK -- MFG. WAVE- OUTPUT OPER. OPER. PRICE LENGTH POWER CURR. VOLT, LS9220 TOSHIBA 660 nm 3mW 65 mA 2.5v 129.M LS92M TOSHIBA 670 nm 3 mW 85 mA 2.3V 49.99 LS92B1 TOSHIBA 670 nrn SmW BOntA 2.4» 59.99 LS921! TOSHIBA 670 nm SmW 50niA 2,3* 69.99 LS9215 TOSHIBA 670 nm 10 nW 45 mA 2.4* 109.99 LS32O0 NEC 670 nm 3 raw 85 mA 2.2* 79.99 LS022 SHARP 780 nm 5 mW 65 mA 1.75* 19,99 Dynamic RAMS EPROMS LASER TUBES STOCK t 41256-60 41256-80 41256-100 41256-120 41256-150 511000-70 511000-80 511000-10 514256-70 514256-80 514256-10 541000-80 544256-80 DESC. 256Ki1 256K>1 256K X 1 256K«1 256KX1 1 meg x 1 1 meg x 1 1 meg x 1 25SK X 4 256KX4 256Kx4 4 meg X 1 1 meg x4 SPEED 60 ns 60 ns 100 ns 120 ns 150 ns 70 ns 80 ns 100 ns 70 ns 80 ns 100 ns 1-24 2.59 2.19 1.99 1.89 1.79 5.49 5.29 5.09 6.49 6.09 5-69 26.99 31.99 25-99 2.46 2.08 1.89 1.80 1.70 5.22 5.03 4.84 6.17 5.79 5.41 25.64 30.39 100+ 2.21 1.87 1.70 1.62 1.53 4.70 4.53 4.36 5.S5 5.21 4.87 23 0B 27.35 STOCK I* 2716 2732 2732A 2764 2764A 27128 27C129 27256 27C2S6 27512 27C512 27C10J4 27C2048 SPEED 450 ns 450 ns 250 ns 250 ns Z50ns 250 ns 250 ns 250 ns 250 ns 250 ns 250 ns 200 ns 200 ns 1-24 25-99 3.29 3.13 4.19 3.29 3.49 3.09 4.79 4.79 4.59 4.29 5.49 5.49 3.98 3.13 3.32 2.94 4.55 4.55 4.36 4.08 5.22 5.22 10.99 10.44 21.99 20.89 100+ 2.92 3.58 2.82 2.99 2.65 4.10 4.10 3.92 3.6T 4.70 4.70 9.40 16.80 STOCK I WAVELENGTH OUTPUT POWER (MIN.) OUTPUT BEAM POWER Of AM (MAX.) BEAM DIVERG. POLAR!- OPERATING OPER. ZATION VOLTAGE CURR. LT7770 LT7650 LT7S56 LT7655 LT765SS LT7632 LT7621S LT7634 LT7621MM LT7627 LT7628 LT7627MM 543nm (Green) 632.8nm (Red) 632 .Bnm (Red) 632.8nra (Red) 632. Bnm (Red) 632 Snm (Red) 632.8nm (Red) 632 8nm (Red) 632. Snm (Red) 632 Snm (Red) 632. 8nm (Red) 63S.8nm (Red) 05mW 0.5mW 0.5m*V 0.5mW 10mW 1.2mW Z.OmW 20mW 5.0mW 5.0mW 5.0mW 10mW l.0mW 2.0mW 2.0mW 2.0mW Z.OmW 3.0mW S.OmW 5.0mW 15mW 15mW ISmW 30mW 0.71mm 0.49mm 0.34mm 0.49mm 0.49mm 0.61mm 0,75mm 0.75mm 1.0mm 0,80mm Q.flOmm 1.2 mm i 1.2 mrad ^ 1.7 mrad S 2.4 mr ad < 1 .7 mrad £ 1.7 mrad < 3.0 mrad £ 1 .2 mrad < 1.2 mrad £ 2.5 mrad S1.1 mrad £1.1 mrad < 4.0 mrad random >10O:1 random random random random random >500;1 random random >500:1 random 17S0vil10« 1000* i 100* 1050*i100v 1000*il00v 1000vil00v 1300*il00v 1300*±100v 1300V ilOOv 1250v±100v 1900V i 100V I900vil00v 1750vil00v 6.5 mA 3,5 mA 2.8 mA 3.5 mA 3.5 mA 3.5 mA 5.0 mA 5.0 mA 6-5 mA 6.5 mA 6-5 mA 6.5 mA FIRING VOLT. < BkV < 7kV £ BkV < 7kV £ 7kV £ 7kV ■S 7kV £ 7kV £ 7kV £ 8KV < 8 XV £ 8kV MIN. SERIES RES. 81k n 68k (1 82k n 68k II 68k fl eik n 68k n 68k n esk n eik n 81k n 81k n WT. (GM.) SIZE DXL (IN MM) 37 x 350 200 25 X 146 70 22.5 x 1 18 60 BRH PRICE CL. 1-8 25x150 25x150 20x210 30x255 30x255 30x255 37x350 37x350 37x350 70 70 70 140 140 140 200 200 200 II ill;! Ilia Ills ins Ilia Ilia Ilia nib nib nib lllb 799.99 529,99 134.99 144.99 159.99 249.99 204.99 209.99 359.99 359.99 3S9.99 479.99 749.99 479.99 124.99 134.99 144.99 229.99 191.99 194.99 334.99 344.99 364.99 444.99 Laser Pointer ■ Output: 3.5 mW • Wavelength: 670NM • Power Supply: 2xAAA Batteries (included) ■ Beam: Approx. 3" @ 100 yards Quantity Discounts Available STOCK # PRICE LSPOINT $199.99 Power Supply *r • Input: 11 5/230V • Output: +5v @ 3.75A + l£v@ 1.5A -12v@ 4A • Size: 7" L x 5'/-" W x 2V4" H STOCK* PRICE PS1003 S19.99 Anti-Static Screen Wipes Collimator Pen • Output: 2.5 mW (max.) • Current: 90-150 mA • Op. Volt.: 2.2-2.5V . Wavelength: 820 NM • Data Sheet Inc. STOCK # SB 1052 PRICE $39.99 Disc Drive & Computer Cleaning Kit Not just a drive cleaner-but a complete computer cleaning kit. Includes swabs, head cleaning tluid, ami-static cleaner, screen wipes and cleaning diskette. STOCK # PRICE SB1099 ZVi" Kit $6.99 SB1100 5Vi" Kit $6.99 Disc Drive Head- Cleaning Kit m Robotic Arm Kit Avoider Robot Kit Includes cleaning fluid and head-cleaning diskette STOCK* PRICE SB1105 3V 2 " Drive Kit $1.99 SB1106 5 1 A" Drive Kit $1.99 For sla tic-sensitive applications. Dispenser packs, individually wrapped. STOCK # PRICE SB1104 Dispenser pack $1.99 of 25 wipes SB1107 Dispenser pack $4.99 of 100 wipes RobDis wore once confined lo science faction movies. Today, whelhEt ihey're performing dangerous tasks or putlmg log el her complex products. robal:cs are finding Their way inlo more untf more industries Tins Robotic Am* KtE is art ed ucaitOfial k:l ITtal leacn^. baSkC fodoIk inm fundimeniials as well as testing your own moioT skills. Command it to perform si m pie tasks. f% An intelligent robot lhat knows how to avoid hitting walls. This robot emits an infra-red beam which delects an obstacle in front and then automatically turns left and continues on. STOCK # YOl PRICE $49.99 STOCK # MV912 PRICE $49.99 ORDER LINE — (800) 824-3432 INTERNATIONAL ORDERS — (818) 341-8833 FAX ORDERS — (818) 998-7975 TECHNICAL SUPPORT — (818) 341-8833 CIRCLE 190 ON FREE INFORMATION CARD • 15,00 MINIMUM ORDER • UPS BLUE, RED & FEDERAL EXPRESS SHIPPING AVAILABLE • OPEN MON -FRI 9:00 AM - 6:00 PM. SAT 10:00 AM - 3:00 PM PDT • CA RESIDENTS ADD ?•.'• SALES TAX • CALL FOP, QUANTITY DISCOUNTS • CALL FOR FREE CATALOG {FOR 1ST CLASS DELIVERY OR CATALOGS DELIVERED OUTSIDE THE U.S. - SEND (2.0G) • WE CARRY A COMPLETE LINE OF ELECTRONIC COMPONENTS 'NO SHIPPING CHARGES ON PRE-PAID ORDERS DELIVERED IN THE CONTINENTAL U.S. § m D3 m 3D 8 101 QUALITY PARTS DISCOUNT PRICES FAST SHIPPING mimaMmmM Highest Quality Metal Cassettes (Erased) j wireless remote control for ninendo > Premium quality metal tape in G-60 and C-90 cassettes {30 or 45 min. per skie). One of the finest Tjrand-name" tapes on the market, In durable, clear piasllc transport mechanisms. Recorded and bulk erased. The record-protect labs have been removed and therefore, need lo be taped over to re- record. Audiophlle* will appreciate the wide dynamic range of this tape. It your cassette deck has a 'metal' setting you will hear the difference. A real bargain 60 min. tape ■ CAT* C-60M $1 .25 each • 10 tor S1 0,00 90 min. tape - CAT* C-SOM SI .65 each ■ 10 for $15.00 CASSETTE STORAGE CASE Black, unbreakable plastic audio cassette storage case. CAT*CBOX 5 1orS1.oa ■ 100 for $15.00 ATTENTION NINTENDO™ USERSlll CAME RICA "Freedom Connection' ™ Turns your wired Nintendo™ control paddle Into a remote control un t Infrared remote like those used on TVs and VCRs eliminates messy wires. Allows players more mobility. Two players can use one remote unit except on garnet where they play simultaneously. In those games two "Freedom Connections' units are requked. Awes-known national discount toy chain sells these for more than twice our price. Operates on 4 AAA batteries (not Included), CAT*IR-1 $9.95 each Set of 4 AAA batteries CAT* 8AT-4 AAA $2,40 per set TOUCH DIMMER when connected to any tamp, will turn I on and off and change the bright nans level when any meial part Is touched. We don't have the wiring harness that origi- nally connected this to the lamp, bul we can provide a alrrpta hook-up diagram and Intlrucl Ion sheet. The solid-slate ck- cuiiry h contained In a ih&rmo- plesllc box 1 J1" X 3.1 1 ' X 0435". CAT* DMft-1 $3.50 each OPTO-SENSORS GE 41 381 U-shaoed opto with 0.125" gap between emmfler and sensor. 0,75" mounting centers. CATiOSU-11 2 ford. 00 TflVTOptron # OPB5447-2 IR emfcter/sensor pair In j— i-. Rectangular package wttti »7[ SaCa! 28" color coded leads. mjjlj" CATiOSR-4 2 for S 1.00 L.E.D.'S Standard JUMBO Diffused T 1-3/4 size (5 mm) RED CAT* LE0-1 10 lor $1.50- 100 tor $1 3.00 GREEN CAT*LED-2 lOfor $2.00- tOO for 117.00 YELLOW CAT* LED -3 10lorS2.00 -100 lor 11 7.00 FLASHING LED W built In flashing circuit Svoltoperatlon. T 1-3/4 | (5mm) .g-^ii^— RED J 1.00 each CAT*LED-4 10 for $9.50 GREEN $1.00 each CAT#LED-*G10for*9.50 YELLOW 11. 00 each CAT*LED-*Y10for$8.50 LED HOLDER ft- Two piece holder. ** O CAT*HLED 10tc-r65e 24 PIN ZERO INSERTION] SWITCHES FORCE SOCKET TextOOl # 224-3344. Protect 24 pin dip ICs trom damage during test, burn -in or programming. Lever-operated mechanism locks part securely In place and releases ft with no damage to component leads, CAT#7JF-!4 $4.50 each WALL TRANSFORMERS 12 Vdc 500 ma. 2.1 mm D.C. power plug with center negative. White case. CAT* DCTX-12SW $4.50 each 12 Vdc 200 ma. 2.1 mm D.C. power plug with center nega- trve. CAT* DCTX-122 $3.00 each RECHARGEABLE ultrasonic ceramic fi HALL EFFECT SENSORS MICROPHONE TRANSDUCER *J± T? Panasonic (Matsushita) *£FRRCBK40K54 An ultrasonic microphone consisting of a blmorph type piezoelectric ceramic vibrator. Ideal tor burglar alarms, auto door openers, flow rate detectors and re- mote control systems. Norn. Freq. 40kHz. Mai Input vols: 20 Volts. 15/16" dla. X 3/8" high. 5/8" long leads. CAT»UST-1 11 .00 each HEAT SINK COMPOUND G C Eieetronlce * 10-S10B - For effective transfer of heat between components and heat sinks. Z9 silicone heat sink com- pound. CAT* HSC-1 $2.00 per 1 oz tube Nickel-Cad AAA SIZE Sf .50 each 1-2 verts 180 mAh CAT* NCB-AAA AA SIZE $2.00 each 1,25 volts 500 mAh CAT* NCB-AA AAS1ZE J2. 20 each WITH SOLDER TABS CAT* HCB-SAA CSLZE $4.25 each 1.2 volts 1200 mAh CAT* NCB-C DSIZE $4.50 each t. 2 volts 1200 mAh CAT* HC B-D MlcroswUch *SS41 Tiny, solid state switch reacts Instantly to proximity of magnetic field. Operates at extremely high speeds, up to 100 khz. Case size: 0.12" X 0.17* X 0.06" thick. 4.5 Vdc to 24 Vdc supply voltage. 10 ma. sink type digital output. Operating gauss - 1 5 lo iO, P. C. leads. CAT* HESW-2 75« each ■ 10 for $6.50 100 for $60.00 ■ 1000 for $500.00 Pushbutton Switch SM Manufacturing 0.47" square black pushbutton. SPST normally open. 4 p.c pins for mount- ing. Ideal for low current switching applications. CAT* PB-29 5 for $1.00- 100 for $15.00 SPSTN.O. Pushbutton SPST normally open p.c mount pushbutton, 0X7 ' square mountng pad. Plunger ex- tend* 0.47" above surface. No pushbutton cap available. ideal. Inexpensive switch where looks are not Impor- tant. 4 p.c. pine on 0.2" X 0.5" mounting centers. CAT*PB-35 5 lor $1.00 Mint Snap-Action OmrpnD2F-L Miniature snap-action switch with lever. Rated 1 amp @ 125 Vac. O.SCr L X 0.2T H X 0,22" W. Lever extends 0.05' beyond end of switch. CAT*SMS-282 75* each • 10 tor $6.50 RFI/EMILINE FILTER L.E.D. FLASHER KIT Jl/, jjiiiiii-tii xr — Sprague#UGN3075LT Operates on 4.5 - 24 Volts Can sink i o ma. With suitable output pul up, can be used directly wflh bipolar or C M OS logic clrcu Us. Especially suled for electronic commutation in brushless D.C motors using multiple ring magnets. Very tiny surface mount package 0.175' X 0.09" X o.oe" thick. CAT#HESW-S 2 for $1.00 fOO tor $45-00 Large quantities avaHaUe 0- Corcom*20B6 20 amp RFUEMi general pur- pose common-mode tiler. Controls line-to-ground noise. Small size, low leak- age. 3.48" x i.te*x2.er. UL and CSA listed. CATIRFI-201 $8.50 each Two LE.D.'s (lash In unison when a B volt ^ battery is attached. This kit Includes a c£57— — p.c. board, all the parts and Instructions to make a simple flash- er droit. A quick and easy project for anyone with basic soldering skills. CATiLEDKJT $1.75 per kit LE.D. CHASER KIT Build this variable speed led chaser. 10 leds flash sequentially at whatever speed you set them for. Easy to bulk) kri Includes pc board, parts and raiructions. ideal for special lighting e l e cts, costumes, etc. Oper- ates on 3 to 9 votts. PC board is 5'X 2,25". A great one hour project, CATSAEC $6.50 each STEPPING MOTOR CONTROLLER KIT Learn about stepping motors whle building this sinple circuit. Includes circuit board, stepping motor and all parts except 12 Vdc power supply. CAT*SMKIT slB.OOeach METRONOME KIT This simple device can be set to clck from 20 to 1.000 beats per minute. Easy to butd. Includes clrcul board, all components and Instructions. Oper- ates on a 9 vort battery (not Included). CAT* METRO $3.76 each PHOTO RESISTOR * 1,000 ohms bright light. 1BK ohms dark. 0.182" dla. X .08*hlgh, 0.16" long leads CAWPRE-7 2 tor $1.00 100 tor $45.00 • 1000 tor $400.00 ORDER TOLL FREE 1-800-826-5432 FAX (818) 781-2653 • INFORMATION (818) 904-0524 Call Or Write For Our Free 64 Page Catalog Outside the U.S.A. send $2.00 postage tor a catalog. Minimum Order $10.00 • AH Orders Can Be Charged To Visa, Mastercard Or Discovercard • Checks and Money Orders Accepted By Mail * California, Add Sales Tax • Shipping And Handling $3.50 for the 48 Continental United States - All Others Including Alaska, Hawaii, P.R. And Canada Must Pay Full Shipping • Quantities Limited * No C.O.D. • Phces Subject to change without notice. MAIL ORDERS TO: ALL ELECTRONICS CORP • P.O. BOX 567 • VAN NUYS, CA 91408 *r CIRCLE 107 ON FREE INFORMATION CARD FAX DIRECT 1-800-582-1255 ORDER DIRECT 1-800-582-4044 SUPPLY SPECIAL -LIMITED OFFERING Limited to stock on hand only - Call now while they last. Price Dimensions HxWxD Input Output Weight (lbs.) Order # 1-9 10+ -5V +12V *5V PSMB7 14.95 13.95 4.125" x 2.1 5" X 6.4" 115VAC 1A 1'A 7A 1.6 PSMB10 16.95 15.95 4.125"x2.1S"x6.4" 11SVAC 1A 1A 10A 1.65 PSMB1S 19.95 18.95 4.875" x 2,0" X 6.9" 115VAC 1A 2A 15A 1.75 PSMB'5 The perfect power supply for your test bench, parts box or hamshack. These units are vented for cool operation, heavy duty aluminum construction and finished in matt black. 90 day warranty. TTERtES i •Sunrise ■Hitachi •Varta Order # 1-9 10+ Voltage Current Type NRAAA 1.95 1.55 N 5 00 A A 1.95 1.55 N1200C 3.45 3.05 N1800C 3.95 3.55 V5022 9.95 8.95 1.2V 180mA AAA 12V 500mA AA 1.2V 1.2 Amp C 1.2V 1,8 Amp C 7.2V 100mA 216 WALL TRANSFORMERS] | DC POWER CONNECTORS] -UL approved ■Input: 120Vac@ 60Hz •Conn.: 2.5 mm DC Plug (except WTMT) Order # WT9200DC 3.95 WT9500DC 4.15 WT12500DC 4.95 WT9500AC 4.15 WTMT 5.95 3.75 3.95 4.75 3.95 5.75 9VDC 200mA 9Vdc 500mA 12Voc„.500mA 9Vac 500mA 3,4.5,6,. ,500mA 7.5, 9 & 12VDC DC Plug (Walkman Type) ...1.3 mm DC Plug (Mini) 2.1 mm DC Plug (Siand.) 2.5 mm DC Chassis Jack (Mini) ....2.1 mm DC Chassis Jack (Stand.) 2.5 mm DC Chassis Jack 2.1 mm DC Chassis Jack 2.5 mm I LO-PRO ZIF SOCKETS [ nniES ELECTRONICS. IMC. •CAM: Cast Metal •Contacts: Spring Temper Beryllium Copper. Tin Plated ■Housing: Glass Filled Polyester, UL94V-0 Order # Price Description. Pins SZ24 SZ28 SZ40 5.95 6.25 6.95 Zero Insertion Force Socket 24 Zero Insertion Force Socket 28 Zero Insertion Force Socket 40 IB* | SNAPPABLE HEADERS] •Test most standard DIP packages -Easier, faster, hands-free testing -Gold plated pins Order # 1-9 10+ Description Contacts EC16 4.95 4.45 Test Clip 3/14/16 EC20 6.95 6.45 Test Clip 18/20 EC24 7.95 7.45 Test Clip 22/24 EC28 8.95 8.45 Test Clip 28 EC40 11.95 11.45 Test Clip 36/40 •Contacts: Gold Plated •Double or Single Row -90° Right Angle or Straight Order* 1-9 10+ Description Contacts H401 .89 .79 H401R .99 .89 H402 1.49 1.39 H402R 1.69 1.59 Header Single, Straight 40 Header Single, 90" 40 Header Double. Straight 80 Header Double. 90° 80 MINI PB SWITCH] •Key Style: Tufeular ■? Sizes: Small A Large •Mounting: 0.7B* (19.2 mm) ■Radial 7 Pin Tumbler Mectianlsm ■Sliver Plaled Contacts & Terminals ■grass Housing & Cylinder. Chrome Pi-ted ■Contact Rating: 6A rffl t25V-c, 3A rS>2S0V« -Small Uml: Body Length - 27" (6 mm) Shorter Order* l -Contact Rating: 1A@ 125 Vac I -Mounting Hole: 9/32" [7 mm) Order - 10+ Desc. Color 39 N/O Red ,39 N/O Black 49 N/C Red 49 N/C Black VISA 2917 Buy view Drive Fremont, CA 94538 FEATURES •22 Awg wire •Stripped 0.25 1 •14 assorted lengths (25 pieces each length) Order # JW350 9.95 JW350R 7.95 8.95-..Jumper Wire Kit 6.95 ....Refill Wire Pack Color. Blue Black 3.95 Green 3.95 Gray 3.95 Red 3.95 Yellow 3.95 White Order Direct: 1-800-582-4044 Fax Direct: 1-800-582-1255 Customer Service: 1 -5 1 0-770-2345 ^^ Monday-Friday, 7am - 5pm (PST)/ \ Onm-Spm (EST) EJ COD-Nt) persona! checks, US funds ($5.00 Surcharge) ED USPS ED UPS E] Federal Express ED Airborne Add 5% of total for shipping UPS Ground ($3.00 min.). Actual shipping charges based on weight. Call or write today for your free copy of our 1991 catalog. California residents, add appropriate sales tax. 12 month worronly on till EosyTeth products. 30 day money back guarantee. We reserve the right to substitute manufacturers. Prices subject la change without notice. CIRCLE 179 ON FREE INFORMATION CARD 2 S m <: CO m 33 103 Winning Products m Test/ Measurement and Prototype Equipment 51 -Piece Electronic Tool Kit Tools Included in Kit: ■ 10' measuring tape • 5.25" needle nose pliers • Electric rape • Utilitj- components box • d ■ piece precision screwdriver set • 6" long tweezers • 8 piece hex key wa-nch set • 7 " brash and scraper • Digital Multimeter • Hrush • ~" fine point probe ■ Round needle file • 1 (') pi etc screwd river set; 6 Slotted & 4 Phillips ■ 7" slotted probe ■ Flat needle file • i.i" diagonal cutting pliers • u" adjustable wrench Global Specialties Protoboard® Design Stcrtio • 5,25" Flat nose pliers • 30 Watt soldering iton ■ Utility knilc with extra blade ■ 5.5" -Stainless steel scissors • Desoldering pump MS305 -SI 19.95 Features: • Ideal liit analog, digital and ^\ microprocessor circuits ^^-~~~ J |f £*-££ \ * I Vi pie DC! regulated power — -^T '"ii-l" I ^ supplies. .5V, ,liV, IW " 2 4 H oW fjod'" ,A * « logic indicators /"Wile"' ^ * tofi* ■> • Junction generator with sine, equate, triangle and Tl, waveforms • Two debounced piuh-bunon switches ■ Two SI'DT slide switches, all leads available and ttneommited • A total of 25211 uncorarhited tie- points • 5.25" Bent needle nose pliers * Soldering stand ■ Rosin core solder ■ Curving ease: I ".I. V\V * 1 2.5"D x 3.5"H Jameco Logic Pulser Jameco Logic Probe • Compatible with TIT, DTL RTL. H'l'l.. HNIL. MOS and CMOS its; ■ IMQ Synt input impedance * I'uUer mude output current: 10mA • Square wave current output: 5mA ■ Audible rone LP540 $16.95 Jameco Solderless Breadboards Part Mil Dim. L" x W" Contact Binding Points Posts Pi JIM JE21 ,1.25x2.125 JE23 d.5 s 2.121 JE24 6.5x3.125 JE25 6:5 x 4.25 JE26 &S75x5.7i JE27 -.25*7,5 -1011 830 1 JfiO 1,660 2,390 .5.220 S4.95 6.95 12.95 17.95 22.95 31.95 • Max Frequency SUM Hi ■ Minimum detectable pulse: 1 0ns* i 2 OKU input impedance • Max. supplv voltage: ±25V * Tl"l. threshold: Il.ol+O.BV±U.1V, (Hit ♦2.3V ±0.2V 'CMOS threshold: [1 .,.;. 30% VCCilO%, (Hi}70%VCC±t0% MS 104 $24.95 Mcfox Digrfid Muftimeten * Handheld, high accuracy * AC/DC voltage.' AC/DC current, resistance, diodes, continuity, tratxsisror hr'E ■ Manual ranging w/ # overload protection **Tw M3650 & M465G only: * Also measure frequency and capacitance M4650 only: • Data hold switch • 4.5 digit M36I 0.1.5 Digil Multimeter. $59.95 M3650 .S.5 Digit Multimeter w/l-reuucaicy & Capacitance $74,95 M4650 4,5 Digit w/l : jL'L[uensy. t lapaciiance & Data 1 lolil Switch $99.95 Handheld Multimeter J AMECO ^^ electron*; components computer products 24 Hour Toll-Free; Order Hotline 1 .800*831 -4242 ' .15 digji LCD with automatic polarity indication • AC/DC voltage measurement up lu 500 volts " AG DC current measurement up to 20l)mA • Resistance measurement up to 20M£1 • Continuity checker w r ith audible tone ■ Diode and logic tester ■ Auto/manual range and data hold I unci ions • All range protection and function indications DMM905 ..$39.95 i'otentiiinietcrs: one IKiiandone 10K! Includes power supply, instrumentation hreadlwardiug PB503 $299. Weller Soldering and Desoldering Stations * Temperature adjustable from 350" to 850°1 • Zero voltage circuit protects sensitive components liont damage * Lighted on/ofl switch WCC100 Soldering Station $89.95 » 5U Watt Temperature Controlled Desoldering Station ■ I )i'No!dcring head is temperature controlled to 80(H : • Low [UaintenaiHi- sat alum system DS600 Desoldering Sim ion $549.95 A.R.T. EPROM UVP EPROM Erase Program iti©r i wa ■ i'togramsall current EPRQMs in the 2716 to 2~512 range plus the X2864 EEPiU IM • RS252 port • Software included EPP $199.95 Erases all EPROM's » Erases 1 chip i 15 minutes and & chips in 21 min UV intensity: 6H0I) UWCM- DE4. ..$£ EPROMs - for your programming needs Part No. TMS25I6 $4.25 TMS2532-35 S.95 TMS2532A 6.95 TMS2564 5.95 TMS2716 5.95 1702A 3.95 2708 4.75 2716 3.39 2716-1 3.75 27C16 4.25 2732 4.95 2732A-20 4.49 2732A-25 3.49 2732A-45 2.95 27C32 4.75 Price Part No. 2764-20 $3.95 2764-25 .3.75 2764-45 3.49 2764A-20 3.75 2764A-25 3.19 27C64-15 3.95 27C64-25 3.25 2712SOTP 3.49 27128-20 7.95 27128-25 7.75 27128A-15 4.95 27128A-20 4.49 27128A-25 3.75 27C128-15 ....5.75 27C1 28-25..... 7.95 Price Pan No. 272560TP $ 27256-15 27256-20 27256-25 27C256-15 27C256-20 27C256-25 275120TP 27512-20 27512-25 27C512-15 27C512-20 27C512-25... 27C010-15 68766-35 • Partial Listing * Over 4000 Electronic and Computer Components in Stock! CIRCLE 114 ON FREE INFORMATION CARD Competitive Prices Computer Products and Electronic Components semble Your Own Computer Kit! Jameco 1 6MHz 80386SX Desktop Computer Kit ilding your own computer provides you h a better understanding of components i their functions depth assembly instruct ions included ve your new computer assembled and ming in an evening, using common tools ware included rchase computer kits configured by leco or design your own i86SX Motherboard with IB RAM (expandable to 8MB] I ^kcy enhanced keyboard thi I/O Card wf controller shiba 1.44MB, 3.5" spy disk drive >y sized desktop case ) Watt power supplv '. DOS "i.O II diagnostic software il6.. $699.95 Integrated Circuits* \CL 1;9 10 + monitor and adapter extra S.29 ..29 ...29 ..29 ..35 ..35 ..35 ..29 ..29 ..35 -.35 ...29 ...35 ...29 ...35 ...45 ...49 ...75 ...99 . .89 .1.19 ...49 ...39 ...49 ...45 ...69 ...45 .2.95 ...59 ...45 1.29 ...49 ...49 ...45 ...39 ...59 ...69 ...79 ...79 .1.19 $.19 .19 .19 .19 .25 .25 .25 .19 .19 .25 .25 .19 .25 .19 .25 .35 .39 .65 .89 .79 1.09 .39 .29 .39 .35 .59 .35 2.75 .49 .35 1.19 .39 .39 .35 .29 .49 .59 .69 .69 1.09 Part No. Dynamic RAMs Description Price ' Call for a complex listing o/IC's 4164-100 100ns, 64 K x 1 51.89 4164-120.. 120ns, 64K x 1 1.69 4164-150 150ns, o4Kx I 1.49 41256-60 60ns, 256K x 1 2.49 41256-80 80ns. 256K x I 2,19 41256-100 ...100ns, 256Kx 1 1.95 41256-120 ...120ns, 256K x I 1.79 41256-150 ...1 50ns, 256Kx I 1.69 5 1 1 000P-80 ... 80ns, 1 MB x 1 7.25 51100OP-10. lUUns, IMBx 1 6.75 Miscellaneous Components Potentiometers Values available (insert ohms into space marked "XX"); VlOLl. IK. 5K. 10K.20K, 50K, IGOK, I MEG 43PXX 3/4 Watt, 1 5 Turn $.99 63PXX 1/2 Watt, 1 Turn 89 Transistors And Diodes PN2222 $.12 PN2907 .12 IN4004 .10 2N2222A .25 1N4735 .25 2N3904 .12 1N751 C106B1 2N4401 1N4148 2N3055 1N270 $.15 .65 .15 .07 .69 .25 Switches JMT123 SI'DT. Un-On (Toggle) .$1.15 206-8 .SPST. 16-pin (DIP) 1.09 MPC121 St'DT, On-Off-On (Toggle) 1.19 MS102 SPST. Momentary (Push-Button) 39 Relisys 14" VGA Color Monitor » Max resolution: 720 x 480 • Bandwidth: 30MHz * Inpui: DBH-pin (analog) RE9513 .$379.95 CP3000 CP30084 CP301O4 CP3204 ADP20 Hard Drives (16-bit IDE) 40MB 3.5" Low Profile $249.95 80MB 3.5"Low Profile $459.95 1 20MB 3.5" Low Profile ....$599.95 200MB 3.5" HH $799.95 Host Adapter $29.95 CP30084 Additional IDE controllers and drives available! Jameco 16-bit Super VGA Card * Emulates VGA. EGA, CGA, MDA and Hercules modes • Includes i 1 2KB video RAM upgradable to 1 MB (Four 514256-80) • Capable of 1024 x 768 with 256 colors (1MB video RAM requited) JE1058S.. $229.95 Connectors Part No. Description Price DB25P Male, 25-pin DB25S Female, 25-pin DB25H Hood DB25MH Metal Hood XC209R XC556G XC556R XC556Y LEDs Tl.(Rcd) Tl 3/4, (Green) Tl 3/4, (Red) TI 3/4, (Yellow) $.65 .75 .39 1.35 $.14 .16 .12 ,16 IC Sockets Low Profile Wire wViplGold) Level *? 8LP $.10 8WW $.49 14LP ,ii 14WW .69 I6LP .12 16WW .79 24 LP .19 24WW 1.15 28LP .22 28WW 1.39 40LP .28 40WW 1.89 Soldertail Standard mid Header Plug Sockets Also At'ftilMe 24-Hour Toll-Free Order Hotline: 1*800*831-4242 Call or Write for a FREE 90-Page Catalog! $30.00 Minimum Order • Data Sheets - 50 C each J AMECO ^^ ELECTRONIC COMPONENTS COMPUTER PRODUCTS fS> 1355 Shoreway Road Belmont, CA 94002 FAX: 1*800- 237-6948 BBS Support: 415 637-9025 International Sales * Customer Service * Technical Assistance ' Credit Department • All Other Inquiries: 415 592-8097 • 7AM - 4PM P.SX Q Wl jamtn PJtemmet U/91 CA fesidenu Add 7*25%. 7.75% or 8,25^ SataTax Shipping, Iiatidling and insurance arc additmnaL tCmi\ may vary according to weight and chipping mcihodl Terms: Prices subject to change without notice, hems subject to availability and pnor sale. Complere list pfterms/wKnanries is available upon request, CIRCLE 114 ON FREE INFORMATION CARD THE ELECTRONIC GOLDMINE OoUmfeM has one of the J gfcatea y*ctW3s d unique EtelrcfliG kits ^latfe i1 njori Fo[Mi*M ■ hrfuch^a ihnpod sfit* UtM and 'e lk»-irjr I 'J: i ■'->- v-.. 1a vary I j H- Md lion CO to JfiO PhHiw pw mruti Cparaios Item i*Q\MC Bcums S-?o C4162 S19.&5 DRILL BIT BLOWOUT rtMhaL^arud soft] bngiten cafb-de tW Mj tnt ST** Poitocl ta dntng PC SWfTll AvjJjfils n Tv idc*rtrj HTM LlttXJ b«bw MICRO MINI HIGH VOLTAGE POWER SUPPLY 'El Ml 77 Mftituft e-jw tuopy putt Out IQOOV wft Wif LWDC n L>*«i cri ., SS '4fT * iarifi n GMi $6.00 NOW ONLY 5« EACH INVERTER TRANSFORMER brg»i*h.K6 12VDC to XW S* tin**/ W1TC0 SB.Q0 Ei(M 10 rtfl J13.D0 NEON DISPLAY LHojo noon tfcd tpral Lmp ha (Jwro cingt iCOCV juw G»1 DIGITAL VOICE BOARD Ticrophcno jnd *wCC*d & !^b«k prftfict MMrWIM OHDER: Sid 00 CMS $350 snosng and hanolirra We accept UC Vrsa are! Money Orders SEND ORDERS TO; Tdo Electronic GoBmne P O Eta S40B SOOffSdale « BS261 PHONE ORDERS [6021 431-7454 FAX ORDERS (602) 451 .943 5 CIRCLE 180 ON FREE INFORMATION CARD y z O pc r- o SCIENTIFIC & ELECTRONIC PRODUCTS LASERS AND SCIENTIFIC DEVICES VP.L2K 3mw Vis Red Laser Diode System Kit SI 55.50 LLIS1K Laser Beam'Bounce"' Lislener Kit S199.5I1 LKC2K Visible Simulated 3 Color Laser Kit...., $44.50 IC7 40 Wall Burning Culling Laser Plans S2D.no Ft JB4 HI Powered Pulsed Drilling Laser Plans 520. !U LGU40 1 1 u 2mw H e He Vi 5 P. e d Last r Gun Assem bltd S1 39 .00 LLS1 Laser Lite Show - 3 Melhois Flam SZD.00 SDSK See in the Dark ttlt , SS99.50 EHL1K Eliclromagnetir; Coil Gun Kit S69.50 MCP1 Hi Velocity Coil Gun Plans SI 3 US LEVI Leviloling Device Plans $10.00 EMI EleclTonie Hypnotism Techniqoei Plans..,., ,.....$10,00 HIGH VOLTAGE AND PLASMA DISPLAY DEVICES HVM7K 75,000 Volt DC Variable Output Lab Source Kit S149.S0 IDG3K Ion Ray Gun Kit, project energy withdul wires S69.S0 I1IG9K 12W/11S VAC HI Qui Neg Ion Generator Kit $34. SO EMA1K Tetekinelic EnhancetfElsctric Man Assembled S99 .50 135k Lightning Display Globe Kit $54.50 BTC1K Worlds Smallest Tesla Coil Kit S»a.5D BTC3K 250KV Tarjle Tcp Tesla Coil Kit $243.50 BTC5 1.5 Million Volts Tesla Coil Plans S20.00 JLU Jacobs Ladder -3 Models Plans ., $15.00 GHA1 Anil Gravity Generator Plans $10.00 PF520 Plasma Fire Seder Assembled $(9.50 FJPL20 Dancing Plasma to Music and Sounds Assembled $79.50 SECURITY AND PROTECTION DEVICES ITM10 100.000 Volt Intimidalor up to 20' Assembled $129.50 IPC7Q IniisiblePainFleldBlaslWaveGen Assembled $74 . 50 PSP4K Phaser Sonic Blast Wave PislotKit S5a.50 LIST10 Inlinily Xmlr. Listen in Via Phone Assembled $199.50 TAT30 Automatic TelHecordingOeviceAsserabled-... $24 .50 VWPM7K3MI. FMAulu Tel Trans mitler Kit $49.50 FMV1K 3 Ml. FM Voice Transmillet Kit S39.S0 HD01K Homing/Tracking Beeper Transmitter Kit $49.SO EASY DFUaERIMC FB0CE00BE TOLL FREE 1 -MD -221 -1705 or 2' HFtS Otf 1 -603-873 1730 or FAX IT TO 1-M3-I7I-S40O VISA. KC CHECK. M0 111 US FUNDS. INCLUDE 10* SHIPPING. OR DEBS $100. DO A JP ONLY ADD S10-0D. CATALOG $1.00 Ott FHEEWITH ORDER. ADVERTISING INDEX 106 1 INFORMATION UNLIMITED P.O. BOX 716. DEPT. R3, AMHERST, NH D3031 RADIO-ELECTRONICS does not assume any responsibility for errors that may appear in the index below. Free Information Number Page 108 AMC Sales 83 107 All Electronics 102 — Amazing Concepts 98, 105 177 American Reliance Inc 17 84 Appliance Service 17 191 Avex Probes 28 77 B&K Precision 87 109 C&SSales 23 — CIE 11,27 195 Cable Warehouse 79 — Command Productions 79 55 Contact East 17 58 Cook's Institute 81 178 Datak Corporation 29 127 Deco Industries 17 179 EasyTech 103 180 Electronic Goldmine I Of, — Electronics Book Club 88 186 F.W. Bell Inc. 29 121 Fluke Manufacturing CV2 — Fordham 3 189 Global Specialties 7 — Grantham College 14 114 Jameco 104, 105 115 Jensen Tools 17 188 Kepro Circuit Systems 16 197 M&G Electronics 97 87 MCM Electronics 99 53 MD Electronics 96 93 Mark V. Electronics 97 — NRI Schools 18 71 NTE Electronics 4 185 Optoelectronics 13 56 Parts Express , 95 184 People's College 25 187 R.L. Drake Co CV4 78 Radio Shack 30 — RE Video Offer..., CV3 193 SCO Electronics 70 196 Signal, Inc 26 — Star Circuits 28 — TAB Books 15 92 Tektronix 42 190 Unicorn 101 194 US Cable 70 181,182 Viejo Publications 81 183 WPT Publications 85 192 Worldwide Cable 98 ADVERTISING SALES OFFICE Gernsbiick Publications, Inc. 500- B Bi- County Blvd. Farmingdale, NY 11735 1(516) 293 3000 President: Larry Steckler For Advertising ONLY 516-293-3000 Fax 1-516 293 3115 Larry Steckler publisher Christina Estrada assistant to the President Arline Fishman advertising director Denise Haven advertising assistant Kelly McQuade credit manager Subscriber Customer Service 1-800-288-0652 Order Entry for New Subscribers 1-800-999-7139 7:00 AM - 6:00 PM M-F MST SALES OFFICES EAST/SOUTHEAST Stanley Levi tan, Eastern Sales Manager Radio-Electronics 1 Overlook Ave. Great Neck, NY 11021 1-516-487-9357, 1-516-293-3000 Fax 1-516-4878402 M I D W EST/Texas/A rkansas/Okla. Ralph Bergen, Midwest Sales Manager Radio-Electronics One Northfield Plaza. Suite 300 Northfield, IL 60093-1214 1-708-446-1444 Fax 1-708-559-0562 PACIFIC CO AST/Mountain States Marvin Green, Pacific Sales Manager Radio-Electronics 5430 Van Nuys Blvd. Suite 316 VanNuys. CA91401 1-818-986-2001 Fax 1-818-986-2009 RE Shopper Jo« Shere, National Representative P.O. Box 169 Idyllwild, CA 92549 1-714-659-9743 Fax 1-714-659-2469 Countersurveillance Never before has so much professional information on the art of detecting and eliminating electronic snooping devices — and how to defend against experienced information thieves— been placed in one VHS video. If you are a Fortune 500 CEO, an executive in any hi-tech industry, or a novice seeking entry into an honorable, rewarding field of work in countersurveillance, you must view this video presentation again and again. Wake up! You may be the victim of stolen words — precious ideas that would have made you very wealthy! Yes, profes- sionals, even rank amateurs, may be lis- tening to your most private con- versations. Wake Up! If you are not the victim, then you are surrounded by countless vic- tims who need your help if you know how to discover telephone taps, locate bugs, or "sweep" a room clean. There is a thriving professional service steeped in high-tech techniques that you can become a part of! But first, you must know and understand Countersurveilance Technology. Your very first insight into this highly rewarding field is made possi- ble by a video VHS presentation that you cannot view on broadcast television, sat- ellite, or cable. It presents an informative program prepared by professionals in the field who know their industry, its tech- niques, kinks and loopholes. Men who can tell you more in 45 minutes in a straightforward, exclusive talk than was ever attempted before. Foiling Information Thieves Discover the targets professional snoopers seek out! The prey are stock brokers, arbitrage firms, manufacturers, high-tech companies, any competitive industry, or even small businnesses in the same community. The valuable informa- tion they filch may be marketing strat- egies, customer lists, product formulas, manufacruring techniques, even advet- tising plans. Information thieves eaves- drop on court decisions, bidding information, financial data. The list is unlimited in the mind of man — es- pecially if he is a thief! You know that the Russians secretly installed countless microphones in the conctete work of the American Embassy building in Moscow. They converred CALL TOLL FREE 1-800-522-6260 HAVE YOUR VISA or NIC CARD AVAILABLE what was to be an embassy and private residence into the most sophisticated re- cording studio the world had ever known. The building had to be torn down in order ro remove all the bugs. Stolen Information The open taps from where the informa- tion pours out may be from FAXs, com- puter communications, telephone calls, and everyday business meetings and lunchtime encounters. Businessmen need counselling on how to eliminate this in- formation drain. Basic telephone use cou- pled with the user's understanding that someone may be listening Of recotding vital data and information greatly reduces the opportunity for others to purloin meaningful information. R A DIO-ELECTRON 1CS VIDEO OF FER RE 500-B Bi-County Blvd. Farmingdale, NY 11735 Please rush my copy of che Countersurveillance Techniques Video VHS Cassette for S4995 plus J4.C0 for postage and handling. No. of Cassettes ordered Amount uf payment 5 Bill my D VISA D MasterCard Caret No. , Expire Date / Signature: _^^_^^_^^^^^^_^^^_^^^^^^^^^^ Nj[Tir Address _^^^^^_^^^^^^^^_^^^^^^^^^^^^^^_ City , State . .ZIP. All payments in U.S.A. funds. Canadians add S4.00 per VHS cassette. No foreign orders. New York State residents add applicable sales tax. The professional discussions seen on the TV screen in your home reveals how to detect and disable wiretaps, midget radio- frequency transmitters, and other bugs, plus when to use disinformation to confuse the unwanted listener, and the technique of voice scrambling telephone communications. In facr, do you know how to look for a bug, where to look for a bug, and what to do when you find it? Bugs of a very small size are easy to build and they can be placed quickly in a matter of seconds, in any object or room. Today you may have used a telephone handset that was bugged. It probably contained three bugs. One was a phony bug to fool you into believing you found a bug and secured the telephone. The sec- ond bug placates the investigator when he finds rhe real thing! And the third bug is found only by the professional, who continued ro search just in case there were more bugs. The professional is not without his tools. Special equipment has been de- signed so that the professional can sweep a room so that he can detect voice-acti- vated (VOX) and remote-activated bugs. Some of this equipment can be operated by novices, others require a trained coun- tetsurveillance professional. The professionals viewed on your tele- vision screen reveal information on rhe latest technological advances like laser- beam snoopers that are installed hun- dreds of feet away from the room they snoop on. The professionals disclose that computers yield information too easily. This advertisement was not written by a countersurveillance professional, but by a beginner whose only experience came from viewing the video tape in the pri- vacy of his home. After you review the video carefully and understand its con- tents, you have taken the first important step in either acquiring professional help with your surveillance problems, or you may very well consider a career as a coun- tersurveillance professional. The Dollars You Save To obtain the infotmation contained in the video VHS cassette, you would attend a professional seminar cosring $350-750 and possibly pay hundreds of dollars more if you had to travel to a distant city to attend. Now, for only $49.95 (plus $4.00 P&H) you can view Countersur- veillance Techniques at home and take refresher views often. To obtain your copy, complete the coupon below or call toll free. Now, You Can Eavesdrop On The World. Introducing the new Drake R8 Communications Receiver. It's world class, world band radio, made-in the U.S.A. From Perth to the Persian Gulf, Moscow to Mozambique, local or global, you hear events as they happen with amazing clarity. Since 1943, Drake has been setting the standards in electronic communications. . . and then raising them. Today, there's no better shortwave receiver than the Drake R8. Out-Of -This- World Performance. The new Drake R8 has more standard features than other shortwave radios. You get wide frequency range (100 KHz to 30,000 KHz), coverage of all world and local bands, and excellent dynamic range. But you also get important features you won't find on receivers costing hundreds of dollars more. A multi -voltage power supply. Pre-amp and attenuator. Five filter bandwidths and synchronous detector. Dual mode noise blanker and passband offset. Non -volatile 100 channel memory. All designed to give you the best reception with the least distortion. Down-To-Earth Design. The ergonomic design of the R8 gives you real ease of operation. You have convenient keypad entry, with large, legible controls. The face is bold. Uncluttered. And the liquid crystal display (LCD) is backlighted for easy reading. Try The R8. . . At Our Risk. If you're not impressed by Drake's quality, performance and ease of operation, return the R8 Receiver within 15 days and we'll refund your money in full, less our original shipping charge. For more information, or to order, call TOLL-FREE, 1-800-9-DRAKE-l. Telephone orders may be placed on a major credit card. $979.00 (Shipping and handling $10 in continental U.S. Ohio residents add 6Vi% tax.) Call TOLL-FREE, 1-800-9-DRAKE-l today. You can't lose. DRAKE In touch with the world, R.L. Drake Company ■ P.O. Box 3006 • Miamisburg, Ohio 45342 U.S.A CIRCLE 1B7 ON FREE INFORMATION CARD