THE INTERNATIONAL JOURNAL FOR RECREATIONAL
THE INTERNATIONAL JOURNAL FOR RECREATIONAL ELECTRONICSus 3.00CANADA GOSeptember 1991Peak Indicator for LoudspeakersZAP51—An 8751 ProgrammerBuild the OpticalockFiber Optics Pt. 1Central Car Locking ControlUnderstanding the EDIF Standard1ffla smarmWorldRadioHistoryFug gri:Nr
TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.PRO 400 withKelvin Meters backed by a2Yr Warren -Parts SPECIALIRONFLUKE 87with STAND, BLUERED LEDLONG LIFE TIPAs Low AsFreq CounterKELVIN DIGITALPROJECT PARTSLED CENTER50% OFF50MULTIMETERSStock No. 990098 4.50ea /1000. OtySpeakerJUMBOLED2", 8Ohm, .1 WattStock No. 35000959 0TYPE - T 13/4, 5mmSTOCK NO.YOUR COST .260020 Red100 Basic150 BaSic DC VOLTAGEAC VOLTAGEOC CURRENTRESISTANCECONTINUITYTestuzzerDIODBE TESTBATTERY TEST3 1/2 Digit LCDLOW BATTERYACCURACY a5%140GKELVIN100 Basic51200 AdvancedDC VOLTAGEAC VOLTAGEDC CURRENTRESISTANCECONTINUITYTest BuzzerDIODE TESTTRANSISTOR OFFBATTERY TEST312 Digit LCDLOW BATTERYACCURACY 05, ROGDC VOLTAGEAC VOLTAGEDC CURRENTAC CURRENTRESISTANCECAPACITANCECONTINUITYTest BuzzerDIODE TESTTRANSISTOR IIFE3 12 Digit LCDLOW BATTERYACCURACY 05% FIDGKELVIN150 Basic 9. 95KELVIN200 Advanced 39 .95 29. 95ProtectiveFREQUENCY COUNTERTO 20MHZ IDEAL FORTROUBLE SHOOTINGAC/DC VOLTAGE RANGESAC/DC CURRENT RANGES5FREQUENCY RANGES5CAPACITANCE RANGESLOGIC TESTCONTINUITY TESTERMUZZERDIODE CHECKTRANSISTOR hFE TESTLED TEST VERIFY GCOOMADDSPLAY 312 DIGIT LCDACCURACY05%IMPEDANCE io men., CxxvCases54. 55For Models 100. 150, 200 5 :PRO 400KELVIN 69. 95Case For Model Pro 40059. 55TraVier Manual (100 Pgs)givEs detailed instructions.An excellent training toolcovering topics for HighSchool HEleg,nner,Advanced/,Trade School (Beginner Intermediate) 8 College.1 "A PERFECT FIT WITHINANY DIGITAL CURRICULUMeOURCLASSROOMTEXTBOOKFEATURES ONE DIGIT TRUE HEXADECIMAL DISPLAYWITH BUILT IN LOGIC (MEMORY. DECODER.DRIVERS) FULL ALPHA CHARACTERS TWO INDEPENDENT CLOCKS - USERADJUSTABLE FREQUENCY .5 DUTY CYCLESIn BREADBOARD:500 PT PROTO-TYPE AREATWO POWER DISTRIBUTION BUSSES (Geo. no)III 4 DATA BIT SWITCHESXI MOMENTARY PUSH BUTTON SWITCH (SPOT) 4 LED DISPLAYS w IC DRIVERS POWER SUPPLY: WALL PLUG-IN TYPE. U.L.LISTEDIII VOLTAGE REG:e5 VOLTS. SHORT CIR.OVERLOAD PROTECTMI HOOK-UP WIRESBI COMPACT CARRYING CASEMI INSTRUCTION MANUAL FOR BEGINNER TOADVANCED USERSMADE WITH PRIDE IN THE USATHELaptopDigitalTrainerONLY 99FREE COMPREHENSIVETEACHER STUDENT LAB MANUALWALL TRANSFORMERSKELVINLD TStock No 9584046070 Series II.73 Series II.75 series Il77 Series II.79 series II680097STOCK NO TYPE Female220069 9V ocisoo yA 3.95 ea220068 4.25 ea12V DC/500 mAWOOs89 127STOCK NO TYPE370048 2.1 mm Male5 .490 149191699UFLUKE 83NT:FLUKE 85FLUKE 87DE269FLUKE 86FLUKE 88 367 423FLUKE 8062A .FLUKE 8060A . 329 395FLUKE 8010A .FLUKE 8012A .FLUKE 8050A . 329 359 439EFLUKE 37FLUKE 45680 00Contacts . YOUR COST4."0500 6800970840 5."Stock NoTYPEYOUR COST68009821380 11."68010042390 22. 95600021555 TIMER .20 Ex600029556 DUAL TIMER .40 EA600039LM566 PLL .60 EA600018741C OP-AMP.306000261458 OP AMP.,.35 EAFUNCTION GENERATORINTERNALLY COIAPENSATEDDUAL CRIC OP AMP DIPEA2N2222PN22226000237805 VOLTAGE REG .36 EA .08600014 .89 EA .79 Sei/50.95.75.ea.45 ea /20 OtyXENON STROBEStock No.260050for XenonStrobe TubeStock No. 32003720 PIN10. OlyYOUR COST'1.25 ea179v.260058Red1.99 ev260088Green1.99 ea 1.79 y260089Yellow1.99 y .89 ea /20 OtyINFRARED LED1.79 yIR Pair, LED infraredtransmitterand receiverStock No. 26006 1 2.79'5.95 y'5.45700072 18. 95150 MHz, X10 39. "eaNEON LAMP20.11TEST ACCESSORIES990104BLACK990105REDNE2, Long LeadsStock No. 2600035 .15ea .12 ea /100 OtyPHOTO CELLCOSTs25. Oty.65 ea.50 ea.65 ea .50 eaCADMIUM SELENIDEStock No. 2600175.99 eaPHOTO CELLSULPHIDEStock No. 260018 5COLOR CODED18" LEADS WITHMINIATURE HOOK-ONPROD AT BOTH ENDSStock No.YOUR COST990108'8.95 ea60 MHz, X1 & X10SPECIALea /20 OtyTRIGGER COILfor Febnceting Your Own Moving Sign Display50 mmSTOCK NO.Moe 345TUBE'2.95 eayIC TESTLEAD SET.99 eaPUSH-BUTTON SW ITC HPUSH-ON, PUSH-OFFStock No. 2700213. Oty'8.25 e5 .555DOUBLEBANANAJACKea.49 ea /100 OtySUB-MINIATURE MOMENTARYSWITCHStock No. 9900029V Alkaline BatteryStock No.5 1.95600056eaSnap5 .15ea5 .10ea/100 Holder5 .20ea5 .10ea/100 YOUR COSTStock No.9901032.30 eaTYPEYOUR COST220039AAA 3.30 ea220025AA 2.85 eaYOUR COSTea52.955 .353. Oty52.07FEMALEBNC TODUALBANANAPLUG1.75 ea/10.eaType -SPST5 .90 S2.75eaKELVINELECTRONICSCIRCLE RESPONSE CARD orYOUR COST3 Oty'5.95 ea4.95 eaD 6.00 ea6000582200389V 8.90 eaBNC TEST CABLES3FT.NealMALE TO MALEStock No.YOUR COST53.45 ea990101ea.79 ea /50 Oty3. CityDUALBANANABINDINGPOST TOMALE BNC PLUGStock No. 9.95 eaea.28 ea /100 QtyStock No. 270034 6.00 eaNI -CAD5MINIATURE TOGGLE SWITCH220037SPECIAL MOVING SIGN DISPLAYSCOPEPROBES2200355 .505 .99.IC CLIPS220027for SOLAR/ROBOTICStock No. 8522111j20. OIYAnodeSOLDER TYPELOADEsStPRINGock No. COLOR ea.69 ea /10 OtyDC MOTORCOSTCathode 1.25 yWRITE for Our CATALOG full ofWHOLESALE PRICED ITEMS.OVER 10,000 ITEMSIN STOCKELECTRONIC COMPONENTS& TECHNOLOGY ACTIVITIES3. Oty'2.95 eaVISA 8 MASTERCARD ACCEPTED 20 MINIMUM ORDERMINIMUM FREIGHT 5Call: 1 (800) 645-9212EASILICON CONTROLLED RECTIFIER(Similar to GE C106C1) 4.0 AMP, 100 PR,5260090 .18 EA630041630383ALARM260022STOCK NO Color11.111;liLoud Penetrating SoundStock No. 6400010.37"7SEGMENTLED READOUT5 .99ea /10 OtyHORN1000 OtySTOCK NO. TYPEmil.'1.59 ea 1.39Bar Graph 249 57920 MHz SCOPEBUZZER3-9Volt DC, 80 dbStock No. 680089 2.50Dual Trace 2 Yr Warranty-Parts & Labor700073eaRED LEDDISPLAYBATTTERYIrFd rinWIRE JUMPER KIT Mr Ls .,Lie4.1.0. -DaCHARGERPrecut, PreStripped4Cell Charger for AAA, AA, C, D or 9V330289 140 Piece Set . 4. 75STOCK NO.YOUR COST330290 350 Piece Set . 7. 755 .07100. Oty.06 ea20. owSCOPESSTOCK NO680093.08 ea1100.STOCK NO. Anode Jumbo260021 COST '1.15 yRECHARGEABLE BATTERIES680098Stock No. Postsea.07 ea0.6" 7SEGMENTLED READOUT 229HEAVY DUTY NI-CAD.39 ma ea260026 Yellow5 .05Project5 .75 9V BatterySNAP &HOLDERMALE JACK.08 ea/100.1 0 eaDuracell /Eveready680093S 63DBREADBOARDSWALLTRANSFORMER.06 ea/100.260027 Greenfor 'Il 3/4 SIZE, BLACKStock No. 250019NEW Series IIBEST BUYFLUKEFLUKEFLUKEFLUKEFLUKE.1000. OlyLED HOLDERFLUKE 70 SerieseaProject1 (516) 349-76207 Fairchild Avenue, Plainview, NYWorldRadioHistory11803FÀ.X: 1 (516) 349-7830
eftelie9oeCONTENTSIn next month's issue Electronic hygrometerAC detectorFunction generator [1]50 MHz 8-bit DACAreview of coding theoryFour-terminal networksAudio spectrumshift techniquesVolume 1Number 11EDITORIAL11Rebuilding our Avocation Is More Do-it-YourselfAPPLICATION NOTES34Remote Control ICs MV500 and MV601Plessey SemiconductorsAUDIO & HI-FI14PROJECT: Peak Indicator for Loudspeakersan ELV designCOMPUTERS & MICROPROCESSORS3953Front coverMaps and charts on aconstantly changing videowall—at 25 m (80 ft) thelargest in Europe—giveup-to-the-minute picturesof how Britain's telephonenetworks are performing,highlighting potentialtrouble spots. BT's Worldwide Network Management Centre at Oswestryreceives every six hoursdata equivalent to thecontents of theEncyclopœdia Britannica.BT says that its digitalnetwork is more comprehensive in comparativeterms than that of anymajor operator. Thecentre currently monitorsall the organization'sprocessor-controlledSystem X exchanges-57in the trunk network and373 local units. It alsomonitors the company'sthree digital internationalexchanges and 1500routes linking its UKnetwork to 199 countries.September 1991Timecode interface for slide controlp.18ZAP51: an 87C51 Programmerby David KytePROJECT: Plotter Driverby Danielo SijtsmaDESIGN IDEAS46Keyboard Circuitby D. NelsonELECTROPHONICS31PROJECT: Asymmetrical-to-SymmetricalConverterby M. EllerPlotter driver -p.53GENERAL INTEREST161848PROJECT: Central Car Locking Controlby S. ZippPROJECT: Time-Code Interface for Slide Controlby A. RigbyPROJECT: A Cheap, Efficient, StrategicFire Alarmby C.C. WhiteheadINTERMEDIATE PROJECT42Build the Opicalockby Michael SwartzendruberRADIO, TELEVISION & COMMUNICATIONS24Fiber optics Part 1-p. 24Fiber Optics Pt. 1by Joseph J. CarrSCIENCE & TECHNOLOGY50Understanding the EDIF Standardby Tony K.P. WongTEST & MEASUREMENT29Copyright 1991 Elektuur BVELEKTOR ELECTRONICS USA US ISSN1051.56901 àpublished monthly except August at 328per year: ISO for two years by Audio Amateur Publica.lions Inc. 305 Union St. Peterborough NH 03458 USASecond class postage paid at Peterborough NH and anadditional mailing office.POSTMASTER: Send address changes toElektor Electronics USA, Caller Box 876. Peter.borough 5H03458-0B76. Return Postage GuaranteedMeasurement Techniques Pt. 6by F.P. ZantisMISCELLANEOUS INFORMATIONElectronics Scene 12, 13; Corrections 28; Letters 56;Readers' Services 57; Terms of Business 58; Advertisers'Index 62; Classifieds 62.WorldRadioHistoryZAP51: an 87C51 programmer -p.39ELEKTOR ELECTRONICS CSA SEPTEMBER 1991
4TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.Dealer Inquiries InvitedNOW AVAILABLE!AUDIO ANTHOLOGY,Volume FourEdited by C.G. McProudThe 34 articles from 1955-1957 in this fourth collection from Audio Engineering magazine take anewtack, emphasizing an overall view of the home soundsystem and offering guidance on how to plan asystem, how to keep it simple, and how to understandand maintain the equipment. Solid state techniquesand circuits are introduced here, along with designsfor amplifiers and preamps and 6 loudspeakers.1001How to plan an aude system. 12 amplffiersand prtold state techn,ques and ca.and 6loudspeaker desarseffleChapters Include: How to Plan Your Hi-Fi System; System Simplicity forAudio; Adequate Audio Power in the Home; Building Simplicity into the Hi-FiSystem; The Care and Treatment of Feedback Audio Amplifiers; High QualityDual-Channel Amplifier; Stereo Monaural Companion Amplifier for the "Preampwith Presence" [Volume Three]; Stereosonic Magnetic Recording Amplifier;High Quality Treble Amplifier; Amplifier Uses Cheap Output Transformer; Effectof the Cathode Capacitor on Push-Pull Output Stages; What's All This AboutDamping?; Electrical Adjustments in Fitting aNew Output Transformer;Which Tube Shall IUse?; Understanding Intermodulation Distortion;The Sad Tale of aHalf-Watt Resistor; Compensation for AmplitudeResponsive Phono Pickups; A Versatile Bass-Treble Tone Control; Record Speed and Playing Time; Recording Characteristic Simulator; Transistor Action; Transistor Preamps; Transistor Tips and Techniques; Transistor Preamp for Low-Output Pickups; ATransistor PlaybackAmplifier; Transistor Tone Control Circuits; ATransistor VU Meter; Distortion in Tape Recording; A Time Delay Commercial Suppressor; BafflesUnbaffled; Ported Loudspeaker Cabinets; The "CW Horn"; The AperiodicLoudspeaker Enclosure; and The Standard Speaker System. t11.Heavily illustrated. 1957, 1991, 144pp., 8 12/x 11, softbound.airregelaearps6.191 0 te. Ine lorq My, dGeui OepreSSW, a. M.]BKAA3/4 16.95YES! Please send meALSO AVAILABLE!BKAA3/1Audio Anthology, Volume One (1947-50) 16.95BKAA3/2BKAA3/3Audio Anthology, Volume Two (1950-52)Audio Anthology, Volume Three (1952-55)16.9516.95BKAA3/X3Choose any 3 volumes, at a savings of 8.95I42.00BKAA3/X4Complete 4-volume set, at a savings of 12.85I54.95SHIPPING: In the US, please add 2 for first book, 75 each addl. In Canada, pleaseadd 4.50 for first book, 75a each addl. Overseas, please add 20% to order.PAYMENT BY:CIMCVISAOIIIOTYITEM. .Please circle the books you have ordered:Vol. 1Vol. 2Vol. 3CHECK/MONEY ORDERSHIPPING Vol. 4.TOTAL ORDER .MAGIC NO.NAMEADDRESSOLD COLONYSOUND LABORATORYPO Box 243, Dept. E91Peterborough, NH 0345824-Hour Lines:Tel. (603) 924-6371FAX (603) 924-9467CITYMASTERCARD OR VISA NO.DAYTIME TELEPHONE NO.ZIPEXPIRATION DATETODAY'S DATEFOREIGN CHECKS MUST BE IN US FUNDS DRAWN ON US BANK.CALL OR WRITE FOR YOUR FREE CATALOG TODAY!ELEKTOR ELECTRONICS USA SEPTEMBER 1991STATEWorldRadioHistory
TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.All Capacitors Are NOT Created EqualIn 1980, Richard Marsh co-authored the groundbreaking article on capacitors for Audio Magazine.His point: Caps, like all audio components, have different sonic characteristics—even film and foil capsdiffer. Their quality depends on materials, construction techniques, and design concepts.In the wake of this article, anumber of new brands entered the market and claimed sonic improvements—though most simply used different lead materials (which get cut off and thrown out anyway). Not one offered anything new in basic design. Not one solved the sonic problems Marsh described.Richard Marsh wasn't satisfied. So he put his years of research experience at a National Laboratoryinto his own creation—the MIT MultiCap'':*A superior multi-sectioned capacitor that is new in concept. So new, Marsh has apatent on itsdesign.*A superior capacitor that does Improve sound. Audibly. Listeners report that the MultiCapprovides extraordinary transparency and neutrality, from the most delicate musical note to themost vigorous and demanding full ensemble tuttis. The closest to no capacitor at all."We search the world over for the very finest components for our designs. The MultiCap is—unconditionally—the best capacitor going—the next-best doesn't even come close. .—David Manley, Designer, VTL"We spent countless hours auditioning the MultiCaps against all the alternatives, regardlessof price, in our analog and digital chains .the improvements leap right out at you—undeniably."—Ed Wong, Chief EngineerJackson Browne StudiosSanta Monica, California"In my system, the MultiCap brought agreater improvement than upgrading my cables.Once you try them in your equipment, you just won't want to take them out."—Leland Pratt,Ancaster Audio, CanadaMeasurements also reveal the MultiCap's superiority, showing:*the lowest ESR*the lowest phase deviations*the most stable phase characteristics*the greatest transient performanceWhat makes the MultiCap so much better than other capacitors?*Not only the selection of the best polystyrene andpolypropylene films.*And not only the selection of the best foils available.*But in each MultiCap, you get ten precision, paralleledcapacitors wound into one compact, optimized unit—that is,the MultiCaps are internally bypassed.oThis cross-sectional drawing shows thecoaxial construction of aMultkap. Forsimplicity's sake, only two of the ten sectionsare included.And thanks to proprietary top-quality construction techniques, the MultiCap will not degrade overtime, as so many others have done.MIT now offers the new metallized MultiCap, using the same patented design, for low-currentusage. Smaller in size, lower in cost—same great clarity of sound.Call or fax for values, prices, and dimensions. And for white papers by Richard Marsh on capacitor design.Music Interface Technologies, 3037 Grass Valley Highway, Suite 8212, Auburn, CA 95603.Phone: 916.823.1186. Fax: 916.823.0180MIT MultiCap'TM: "The most advanced capacitor in the world."WorldRadioHistoryELEKTOR ELECTRONICS USA SEPTEMBER 1991
6TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.II JcAD\ ?EUROPE'SHOTTEST KITSNOW AVAILABLEINNORTH AMERICA!IBM PC SERVICE CARDThis card was developed for assistance in the field of service,development and test. The card isused as abus-extension to reach themeasurement points very easy. It isalso possible to change cards withouthaving a "hanging computer".Ready Assembled ModulePLOTTER MARK-IIcompletely reworked version: see Elektor Electronics March 1990.Max. width 50 cm." All mechanical parts supplied ready-drilled, filed and tapped, so getgoing at once." Complete kit, including 2stepper motors, 3pen lift solenoids, HPGL softwareon disk (IBM), stepper motor control board 145IC TESTER FOR IBM-PCXT/ATWith the ELV IC tester logic function tests can be carried out onnearly all CMOS and TTL standard components, accommodated in DIL packages up to 20pin. The tester is designed as aninsertion card for IBM-PC-XT/ATand compatibles. A small ZIF testsocket PCB is connected via aflat band cable. Over 500 standerd components can be tested using the accompanyingcomprehensive test software.Complete Kit including Textoolsokket, connectors, sockets. Flatband cable, PCB, Software.loo.loo 275COLOUR TEST PATTERN GENERATORA PAL-compatible colour video source thatsupplies a number of test patterns foraligning television sets.A test pattern generator is virtually indispensable for troubleshooting in television setsbecause it supplies a video signal that isknown to be stable, and thus easilydisplayed and synchronized on anoscilloscope.Inc. case and front100.111 175Ready Assembled ModuleMICROPROCESSOR-CONTROLLEDFREQUENCY METERA professional grade multi-purpose frequency meter, designed by Elektor Electronics, that can be build by many ataffordable cost. Described in Elektor Electronics December 1984, January & February1985. U665B-based prescaler. Frequency meter:0.01 Hz to 1.2 Ghz. Pulse duration meter:0.1 to 100 s.II Pulse counter:0to 10 9 pulses Period meter:10 ns to 100 ns Sensitivity:Input A: 10 mV rrns (Z 2M12); Input B: TTL or CMOS compatible(Z in 25 ka); Input C: prescaler input:10 mV rms (Z in 50 S2). Auto-ranging and completely menudriven. 6or 7digit accuracy.ELEKTOR P.C. i/o card 200ELEKTOR ELECTRONICS USA SEPTEMBER 1991 220.007 175WorldRadioHistoryKit ihcludes power supply,prescaler and enclosure100.112 300
TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.S-VHS/CVBS-TO-RGB CONVERTERBASIC COMPUTERWith Intel 8052AH-BASIC100 117/ 180ANALOG MODULEeps 880162DIGITAL MODULEeps 880163ADRESSDECODEReps 880159100.113 80100.114 55100.115 45Following last month's introduction into themain characteristics of the Super-VHS system,we close off the article with details of apractical converter circuit that allows an SVHS-VRC or camcorder to be connected tothe RGB inputs of a colour TV or monitor. Thecircuit presented here forms a state-of-the-artapproach to all-analogue picture standardconversion, and is based on the latest in ICtechnology available for this purpose.220 039 150AVAILABLE FROM:OLD COLONYSOUND LABPO Box 243, Dept E91Peterborough, NH 03458 USA24-Hour Lines:Tel (603) 924-6371 FAX (603) 924-9467 Check, money order, MCNISAaccepted Please allow 6-8 weeks for delivery SHIPPING: Airmail shipping to USAincluded in priceOthersPleaseinquire CUSTOMS: USA residents may berequiredto pay 5-10% customsduty Others may varyMULTIFUNCTION MEASUREMENTCARDS FOR PCsThe high-performance insertion card described in this article allows your IBM PC-XT,PC-AT or 100 % compatible to measure directvoltage at 12-bit accuracy, as well as frequency and a host of other parametersrelated to pulse-shaped signals. The accuracy and versatility afforded by the card areof a level associated with much more expensive, industrially rated products. Themenu-driven control software developed forthis exciting project allows you to keep tabson up to eight voltages quasi-simultaneously,while up to eight remaining inputs can beused for time-related measurements including frequency, duty factor and pulse duration, not forgetting the event counter.Connected to the sensors and timing devices of your choice, this card turns a PCinto a powerful central controller in a complex measurement and control system.MICROPROCESSOR-CONTROLLEDTELEPHONE EXCHANGEThe telephone exchange presented hereallows up to eight pulse-dialling telephonesets to be connected, and has an option forconnecting calls to or from an external(trunk) telephone line. The unit is controlledby the popular 8052-based BASIC computerwe introciuced a few years ago.220.057 190MAIN SPECIFICATIONS Mode: Single-one adjustable power supplywith current an voltagecontrols.-Output:0 40 Vat 0 -5A220.040 225 Mode: independent-two identical, electricallyseparated, power supplies.-Outputs:2x0- 40V at 2x0- 5A Mode: Tracking-two indenticol. series connected, power supplies.-Outputs: 0 - 40 V at 0 5A80Vat0- 5A-Voltage and current of slavefollow master.SPECIAL PARTS SERVICEWe are the no. 1suppliers of hard-to-findcomponents for Elektor Electronics projects.Always contact us first if you see anunfamiliar component. Items includeanalogue & digital ICs (HCT, SMD), precision resistors (1%, 0,1%), capacitors(MKT/styroflex), inductors (Neosid. Toko),transducers, enclosures (Telet. OKW) andquartz crystals.FOR FURTHER INFORMATION,PLEASE SEND A BUSINESS-SIZE400-WATT LABORATORY POWERSUPPLYHere is an all-purpose d.c. power supply forsymmetrical as well as asymmetrical use,and capable of supplying high output currents and voltages. An all-analogue designbased on discrete parts only, this 400-wattPSU deserves a prominent place on yourwork bench.SASE TO OLD COLONY SOUND LAB(ADDRESS ABOVE), AUN: MEEK IT.MAIN FEATURES 8Internal lines 1external line memory for 10 numbers.Internal through connections versatile computer control automatic hold for external line simple-to-extend can be interfaced to a PC selective external callacceptance shortcut dial codes for externalnumber works with pulse-dialling telephone sets one optinal relay for extraswitching functionex case 220 036WorldRadioHistory 525 Mode: parallel-two identical. parallel connected, power supplies.-Outputs: 0.6 -39.4 V at 0 -10 A Maximum output voltage:O -40 V (at full laod)48 V (no load) Maximum output current:: Rippie:5A10 my (no load)50 mV (at full load) Voltage difference intracking mode:50 mVELEKT()R ELECTRONICS USA SEPTEMBER 1991
TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.ftSESCOM INC .1111m1 avMODEL #.DESCRIPTION (Width xDepth xHeight)1RU519 x5x1.75 in. (482.6 x127 x44.45mm)1RU719 x7x1.75 in (482.6 x177 x44.45mm)1RU1019 x10 x1.75 in. (482.6 x254 x44.45mm)2RU519 x5x3.50 in. (482.6 x127 x88.9mm)2RU719 x7x3.50 in. (482.6 x177.8 x88.9mm)2RU1019 x10 x3.50 in. (482.6 x254 x88.9mm)3RU519 x5x5.25 in. (482.6 x127 x133.35mm)3RU719 x7x5.25 in. (482.6 x177.8 x133.35mm)3RU1019 x10 x5.25 in (482.6 x254 x133.35mm)MODEL I.PRICE 28.0030.0032.0030.0032.0034.0038.0040.0042.00The above rack chassis are made of .063 aluminum.The front and rear panels are clear brushed anodized.All hardware is included. Assembly Required.META in.6x5x3in.8x5x3in.4x7x4in.6x7x4in.8x7x4in.(Width xDepth xHeight)(101.6 x76.2 x50.8mm)(152.4 x76.2 x50.8mm)(203.2 x76.2 x50.8mm)(101.6 x127 x76.2mm)(152.4 x127 x76.2mm)(203.2 x127 x76.2mm)(101.6 x177.8 x101.6mm)(152.4 x177.8 x101.6mm)(203.2 x177.8 21.0023.00The above cabinets are made of .063 aluminum.The front and rear panels are clear brushed anodized.All hardware and rubber feet are included. Assembly Required.PUNC IIKirs ANd PUNC IIESModel I.DescriptionHP-15JR TOOL KITPrice49.00HP-3BENCH MOUNT15.00PD-1ROUND 1/16"PD-2ROUND 5/64"6.00PD-3ROUND 3/376.00PD-4ROUND 7/64"6.00PD-5ROUND 1/8"6.00PD-6ROUND 9/64"6.00PD-7ROUND 5/32"6.00PD-8ROUND 11/64"6.00PD-9ROUND 3/16'6.00PD-10PD-11ROUND 13/64"6.00ROUND 7/32'6.00PD-12ROUND 15/64"6.00PD-13ROUND 1/4'6.00PD-14ROUND 17/64'6.00PD-15ROUND 9/326.006.00PD-16SQUARE 1/8"66.90PD-17SQUARE 5/32"66.90PD-18PD-19PD-20PD-21SQUARE 3/16'REC. 1/8 x3/16'REC. 1/8 x7/32'REC. 1/8 x15/64"66.9066.9066.9066.90COMpONENT PARTSRU LPONLETTERSRAC kCI1ASS ISMODEL a.MC-1AMC-2AMC-3AMC-4AMC-5AMC-6AMC-7AMC 8AMC-9ATHE "FIR ST CHO ICE"FO RCO NSTRU CTO RS HARDWAREPARTS DIVISION2100 WARD DR.HENDERSON, NV 89015 -9998Model it.DescriptionPrice HP-2XX TOOL KIT129.75HP-4BENCH MOUNT 15.00PD-30ROUND 1/16'9.50PD-31ROUND 5/64'9.50PD-32ROUND 3/32'9.50PD-33ROUND 7/64"9.50PD-34ROUND 1/8'9.50PD-35ROUND 9/64"9.50PD-36ROUND 5/379.50PD-37ROUND 11/64"9.50ROUND 3/16'9.50PD-38PD-39ROUND 13/64'9.50PD-40ROUND 7/32"9.50PD-41ROUND 15/64'9.50PD-42ROUND 1/4"9.50PD-43RONND 17/64"9.50PD-44ROUND 9/329.50PD-45ROUND 19/64'9.50PD-46ROUND 5/16"9.50PD-47ROUND 21/64'9.50PD-48ROUND 11/32'9.50PD-49ROUND 23/64"9.50PD-50ROUND 3/8"9.50PD-51ROUND 25/64'9.50PD-52ROUND 13/32'9.50PD-53ROUND 27/64'9.50ROUND 7/16'9.50PD-54PD-55ROUND 29/64'9.50PD-56ROUND 15/32'9.50PD-57ROUND 31/64'9.50PD-58ROUND 1/2'6.00PD-59ROUND 33/64"6.00PD-60ROUND 17/32'6.00P0-6166.90SQUARE 1/8'PD-62SQUARE 5/3766.90PD-63SQUARE 3/16"66.90PD-64 REC. 1/8 x3/16' 83.1083.10PD-65 REC. 1/8 x1/4"P0-66 REC. 1/8 x5/16' 83.10PD-67 REC. 1/8 x3/8'83.10PD-68 REC. 1/8 x11/32 1LT-12LT-12LT-12DESCRIPTIONPRICE CAPITAL LETTERS HELVETICA 14 pt.LOWER CASE LETTERS HELVETICA 14 pt.NUMBERS HELVETICA 14 ptCAPITAL LETTERS HELVETICA 10 pt.LOWER CASE LETTERS HELVETICA 10 ptNUMBERS HELVETICA 10 ptCAPITAL LETTERS HELVETICA 6pt.LOWER CASE LETTERS HELVETICA 6ptNUMBERS HELVETICA 6pt.DIAL MARKING (DOTS)DIAL MARKING (LINES)WORDS (AUDIO) HELVETICA 10 pt.WORDS (AUDIO) HELVETICA CAPS 6ptWORDS (AUDIO) HELVETICA UPPERAND LOWER CASE 53.953.95TERMS AND CONDITIONSMINIMUM ORDER: The minimum order is 10.00.TERMS: Terms of payment on open accounts are NET 30 daysfrom date of invoice.C.O.D. ORDERS: Payment must be made in cash, money orderor certified check. Acompany check will be accepted only if previously approved by the factory.OPENACCOUNTS: SESCOM, INC. extends cred it to governmentagencies and industrial accounts with agood published rating. Firmsmay apply for an open account by requesting acredit application fromthe Accounts Receivable department. All orders are shipped C.O.D.until credit is approved. (Please allow 4to 6weeks to open anewaccount.) We accept Mastercard and Visa.PRICES: Catalog prices are NET, FOB destination shipped UPSground. UPS BLUE and RED LABEL service available at an additionalcharge: UPS BLUE is 10.00 and UPS RED is 20.00. PRICES ARESUBJECT TO CHANGE WITHOUT NOTICE. Orders are invoiced atprices in effect at the time of shipment unless specifically quoted otherwise. SESCOM, INC. shall add any existing or future Federal, State,or Local taxes that may apply. We reserve the right to apply the aboveif your Tax Exemption Certificate is not on file with our office.SHORTAGE OR DAMAGE: All claims for shortage or shipmenterror must be made within 10 days after receipt of the shipment. Ourliability is limited to the material value on the invoice.MERCHANDISE RETURN: Aprior written authorization fromSESCOM, INC. must be issued before return of any material. Instructions for returning the material will accompany the authorization.Material that is returned without authorization or is over 90 days willcarry arestocking fee of aminimum of 25% to amaximum 100%.Special order items will not be accepted for return.SUBSTITUTIONS: We reserve the right to substitute higherquality (but identical part) at our option, unless you specify no substitution at the time of the order.SIIEET META I.PUNC IIESMODEL CHPUNCHPUNCHPUNCH PUNCHHOLE SIZEPILOT HOLEPRICE 5/16'111-1/16* ROUND5/16'121-1/8'ROUND5/16'131-3/16' "221'SQUAREVT23 21/32 x5/16' REC.1/2'24*THURST RACES FOR PUNCHES(FOR EASIER PUNCHING) V thru .9535.9545.9545.959.95TRANSISTORSPART ONNPN TO92PNP 7092PNP 7039PNP 7039NPN 70237PNP 00 .08.08.54.60.2828DIODES:PART NO.1N34A1N40011N4148DESCRIPTIONGE DIODESI DIODESI DIODE1-9.17.13.0910-99.15.11.07100 13.10.061-9.601.051.281.8010-99.54.951.151.62100 10.11.12.14.16100 .09.10.11.13.15LINEAR INTEGRATED CIRCUITS:PART NO.DESCRIPTIONLF351NSINGLE OP-AMPLF353NDUAL OP-AMPNE5534NSINGLE OP-AMPNE5534ANLOW NOISESINGLE OP-AMPNE5532NDUAL OP-AMPIC SOCKETS:PART NO.SOC-8SOC-14SOC-16SOC-18SOC-20DESCRIPTION8PIN TIN14 PIN TIN16 PIN TIN18 PIN TIN20 PIN TINCARBON FILM RESISTORS:PART NO.DESCRIPTION1-9 10-99CF VALUE5% 1/4W0502ALL STANDARD VALUES 10OHM THRU 1OM OHM100 01POTENTIOMETERS:PART NO.DESCRIPTION10KA10K AUDIO TAPEFI1-920010-99180100 160CONNECTORS:PART NO.DESCRIPTIONXLR FCA3PIN CABLE FEMALEXLR M CA3PIN CABLE MALEXLR FCH3PIN CHASSIS FEMALEXLR M CH3PIN CHASSIS MALE1/4 ST1/4' STERIO JACK3.5 ST3.5mm STERIO JACKRCARCA PHONO JACK 242.40.87.87.59100 2.562.202.882.08.78.78.52CAPACITORS: Axial Lead ElectrolyticPART NO.DESCRIPTIONAC 1/50lut -50VAC 4.7/254.7uf -25VAC 10/2510u1 -25VAC 47/2547u1- 25VAC 100/25100uf -25VAC 220/35220uf -35VAC 470/35470uf -35VAC 1000/351000uf .62.871.212.00100 .30.30.30.37.55.781.071.78CAPACITORS: Radial Lead ElectrolyticPART NO.DESCRIPTION1-9 10-99RC 1/50lut -50V.26.24RC 4.7/254.7uf -25V.28.26RC 10/2510u1- 25V.31.28RC 47/2547u1- 25V.39.35.41RC 100/25100uf -25V.36RC 220/35220uf -35V.61.55RC 470/35470uf -35V.99.901.27 1.15RC 1000/351000uf -35V100 .21.23.25.28.33.49.801.02 UPSMasterCardGROUND SHIPPING IS FREE WITHIN THE CONTINENTAL LIMITS OF THE USA TOLL FREE ORDERING IN ALL 50 STATES AND CANADAFOR ADDITIONAL INFORMATION CONTACT: SASESCOM INC.- PARTS DIVISION, 2100 WARD DR., HENDERSON, NV89015-9998FOR ORDERS: 1-800-634-3457 FAX: 1-702-565-4828 REGULAR BUSINESS: 1-702-565-3400BUSINESS HOURS: 8:00 A.M. TO 4:00 P.M. PACIFIC TIME ,MONDAY THRU FRIDAYELEKTOR ELECTRONICS USA SEPTEMBER 1991WorldRadioHistory
9TELL OUR ADVERTISERS YOU SAW THEIR AD IN ELEKTOR.NITORING TIMES/AÍ'andENTERPRISES-The perfect combinationfor global reception!Since 1982 Monitoring Times has been the mostauthoritative guide for radio listening. Whether yourinterest is international broadcasting or two-waycommunications, MT's monthly updates on frequencies,schedules, station profiles, equipment reviews andmonitoring tips,
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