Build this Iswid TE TV CEIVE git under How to 114 ALOG CIRCUIT New back Easy to build POWER SWITCHER UHF PREAMP you can u PLUS: é Hobby Corner Service Clinic * State -Of -Solid State Communications Corner * Equipment Reports www.americanradiohistory.com THE NEW TRIPLETT DMM FAMILY When you're shopping for digitals, MODEL 3400 be sure to check out these Triplett Multimeters. They're loaded $125 MODEL 3410 Digital with extras that extend multimeter $140 MODEL 3450 life and make your job a lot easier $150 and safer. MODEL 3400 ... Overload protected to 600 volts on ALL ranges, Typical DC accuracy 0.2%, Hi/ Low Power Ohms, Typical battery life 500 hours with low battery SAVE $10.00 indication. Price only $125. MODEL 3410 ... Overload protected to 1000 volts on Purchase one of the Model 3400 Series DMM volts and ohms with no fuse blow, Typical DC accuracy between March 15, 1982 and June 15, 1982 and 0.2%, other features similar to Model 3400. Price only receive a $10.00 rebate. $140. TO RECEIVE REBATE, YOU MUST MODEL 3450 ... Audible continuity plus actual reading, Overload protected to 1000 volts on 1. Distributor identified, dated sales resistance Typical DC accuracy receipt (Non -returnable) volts and ohms with no fuse blow, Power Ohms, Typical battery life 500 SEND 2. Warranty Card from back of Instruc- 0.15%, Hi/ Low $150. tion Manual. hours with low battery indication. Only 3. This completed form. Triplett's over 75 years experience is evident in the engineering firsts included in these digital testers. Plus a TO: Model 3400 Series Rebate Offer full ONE YEAR WARRANTY. For a free no -obligation Triplett Corporation demonstration, contact your Triplett distributor, Mod - Bluffton, OH 45817 Center or Representative. ADDITIONAL TERMS Rebate requests must be postmarked by July 1, 1982, or returned refused. Offer good only in U.S.A. and void where prohibited, taxed or TRIPLETT restricted by law. Distributors not eligible for rebate. Triplett Corporation, Bluffton, OH 45817 Allow 6-8 weeks for your rebate check. (419) 358-5015, TWX (810) 490-2400 NAME Triplett performance .. COMPANY ADDRESS a tough act to follow CITY STATE ZIP CIRCLE 30 ON FREE INFORMATION CARD CIRCLE 31 FOR in -Plant Demonstration www.americanradiohistory.com The satellites are there. And all you need is an earth The packages are priced very attractively. station to put the signals to work for you. It's a very real opportunity for you and your We have a complete new selection of packages- customers to make a good profit. dishes, electronics, associated MATV equipment, If it sounds good, call us toll -free for more and all-that you can sell and install wherever you've information. put in MATV systems. Hotels. Motels. Nursing homes. In New Jersey Hospitals. Condos. Apartments. 800-631-5491 20 679-4000 Blonder Tongue Laboratories Incorporated One Jake Brown Road Old Bridge, NJ 08857 CIRCLE 28 ON FREE INFORMATION CARD www.americanradiohistory.com Why use their flexible discs: Athana, BASF, Control Data, Dysan, IBM, Maxell, Nashua, Scotch, Shugart, Syncom, 3M, Verbatim or Wabash when you could be using MEMOREX high quality error free discs? CE quant. 100 price Product Description Part # per disc ($) 8" SSSD IBM Compatible (128 B/S, 26 Sectors) 3062 2.09 8" SSSD Shugart Compatible, 32 Hard Sector 3015 2.09 8" SSDD IBM Compatible (128 B/S, 26 Sectors) 3090 2.74 8" DSDD Soft Sector (Unformatted) 3102 3.14 8" DSDD Soft Sector (128 B/S, 26 Sectors) 3115 3.34 8" DSDD Soft Sector (1024 B/S, 8 Sectors) 3104 3.34 8" DSDD Burroughs B-80 Comp., 32 Hard Sector 3092 3.34 51/4" SSSD Soft Sector (Unformatted) 3401 1.94 51/4" SSDD Soft Sector w/Hub Ring 3481 2.34 51/4" SSDD 10 Hard Sector w/Hub Ring 3483 2.34 51/4" SSDD 16 Hard Sector w/Hub Ring 3485 2.34 51/4" DSDD Soft Sector w/Hub Ring 3491 3.09 51/4" DSDD 10 Hard Sector w/Hub Ring 3493 3.09 51/4" DSDD 16 Hard Sector w/Hub Ring 3495 3.09 SSSD = Single Sided Single Density,. SSDD = Single Sided Double Density DSDD = Double Sided Double Density Memorex Flexible Discs...The Ultimate in Memory Excellence Quality Quantity Discounts Available Memorex means quality products that you can depend High Quality Memorex Flexible Discs are packed 10 discs to a on. Quality control at Memorex means starting with the carton and 10 cartons to a case. Please order only in best materials available. Continual surveillance through- Increments of 100 units for quantity 100 pricing. We out the entire manufacturing process. The benefit of are also willing to accommodate your smaller orders. in media Error Memorex's years of experience magnetic pro- Free Quantities less than 100 units are available in incre- duction, resulting, for instance, in proprietary coating ments of 10 units at a 10% surcharge. Quantity formulations. The most sophisticated testing proce- discounts are also available. Order 500 or more discs dures you'll find anywhere in the business. at the same time and deduct 1%; 1,000 or more saves VISA 100 Percent Error Free you 2%; 2,000 or more saves you 3%; 5,000 or more t Each and every Memorex Flexible Disc Is certified to be saves you 4%; 10,000 or more saves you 5%; 25,000 or 100 percent error free. Each track of each flexible disc more saves you 6%; 50,000 or more saves you 7% and is tested, Individually, to Memorex's stringent standards 100,000 or more discs earns you an 8% discount off our Order Toll-Free! of excellence. They test signal amplitude, resolution, super low quantity 100 price. Almost all Memorex low-pass modulation, overwrite, missing pulse error Flexible Discs are Immediately available from CE. Our (800) 521-4414 In Michigan and extra pulse error. They are torque -tested, and warehouse facilities are equipped to help us get you 1313) 994-4444 competitively tested on drives available from almost the quality product you need, when you need It. If you every major drive manufacturer in the industry includ- need further assistance to find the flexible disc that's ing drives that Memorex manufacturers. Rigid quality right for you, call the Memorex compatibility hotline. audits are built Into every step of the man manufacturing Dial 800.538.8080 and ask for the flexible disc hotline process and stringent testing result in a standard of extension 0997. In California dial 800-672-3525 ex- excellence that assures you, our customer, of a quality tension 0997. Outside the U.S.A. dial 408-987-0997. product designed for Increased data reliability and Buy with Confidence consistent top performance. To get the fastest delivery from CE of your Memorex Flexible Customer-Oriented Packaging Discs, send or phone your order directly to our Computer Memorex's commitment to excellent does not stop Products Division, Be sure to calculate your price using the CE prices In this ad. Michigan residents please add 4% sales tax. with a quality product. They are proud of their flexible Written purchase orders are accepted from approved govern- discs and they package them with pride. Both their ment agencies and most well rated firms at a 30% surcharge packaging and their labeling have been designed with for net 30 billing. All sales are subject to availability, acceptance your ease of identification and use in mind. The desk- and verification. All sales are final. Prices, terms and speci- top box containing ten discs is convenient for filing and fications are subject to change without notice. Out of stock For Data Reliability-Memorex Flexible Discs storage. Both box labels and jacket labels provide full Items will be placed on backorder automatically unless CE Is information on compatibility, density, sectoring, and Instructed differently. Minimum order $50.00. International record length. Envelopes with multi -language care and orders are Invited with a $20.00 surcharge for special handling handling instructions and and color -coded removable In addition to shipping charges. All shipments are F.O.B. Ann Arbor, Michigan. No COD's please. Non -certified and foreign labels are included. A write-protect feature is available checks require bank clearance. to provide data security. Mall orders to: Communications Electronics, Box 1002, COMMUNICATIONS Full One Year Warranty- Your Assurance of Quality Ann Arbor, Michigan 48108 U.S.A. Add $8.00 per case or Memorex Flexible Discs will be replaced free of charge partlal-case of 100 8 -Inch discs or $8.00 per case or partial ELECTRON ICS' case of 100 51/4 -inch minl-discsfor U.P.S. ground shipping and by Memorex if they are found to be defective In materials handling In the continental U.S.A. If you have a MasterCard or or workmanship within one year of the date of purchase. Visa card. you may call anytime and place a credit card order. Other than replacement, Memorex will not be respon- Order toll -free In the U.S. Call anytime 800-521-4414. If you Computer Products Division sible for any damages or losses (including consequential If you are outside the U.S. or in Michigan, dial 313-994-4444. damages) caused by the use of Memorex Flexible Order your high quality, error free Memorex discs today. 854 Phoenix O Box 1002 D Ann Arbor, Michigan 48106 U.S.A. Discs. Copyright n1982 Communications Electronics" Call TOLL -FREE 18001521-4414 or outside U.S.A. 1313) 994-4444 2 CIRCLE 32 ON FREE INFORMATION CARD www.americanradiohistory.com II I Radio- THE MAGAZINE FOR NEW Elecironici IDEAS IN ELECTRONICS Electronics publishers since 1908 MAY 1982 Vol.