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125 Transistor Projects No. 537 $4.95 ONE TRANSISTOR PROJECTS BY RUFUS P. TURNER AUDIO AMPLIFIERS RF, IF, &DC AMPLIFIERS OSCILLATORS CONTROL & ALARM DEVICES TEST INSTRUMENTS POWER SUPPLY APPLICATIONS RECEIVERS, TRANSMITTERS & ACCESSORIES One125Projects -Transistor OneTransistor125 By ProjectsRufus P. Turner BlueTAB Ridge BOOKSSummit, Pa.17214 FIRST PRINTING-AUGUSTFIRST EDITION 1970 FOURTHTHIRDFIFTHSECOND PRINTING-AUGUST PRINTING-OCTOBERPRINTING-APRIL PRINTING-MAY 19751972 1974 1974 One of the Preface CopyrightPrinted 01970inof theAmerica Unitedby TAB States BOOKS here;usefulness.transistortion single-handedly however, circuitsmany Only all virtuesa shownfew varieties in inexpensive allof in thekindsthis transistor bookof transistorcircuits. are is itsexamples The typesability125are to singleof func-used this - permissionReproductionrespect to the of use orthe publication ofpublisher. the information of is the prohibited. contentherein. inNo any liability manner. is withoutassumed express with siderationofshouldsilicon, effort be NPN, and able the equipment.PNP,to set upunijunction, and The test are circuittheseand represented: circuitsfield-effect. designs with take germanium, aThe minimuminto reader con- PaperboundHardbound Edition: Edition: International International Standard Standard Book Book No.No. 0-8306-0537-1 0-8306-9537-0 specified,minimumonlyratings; maximum manufacturers' avalue choice was comparativelyand between used). minimumtypicalThus, standard valueswherevalueswide spreadawere were30K used-ohm specified, in (or transistorresistor where the is Library of Congress Card Number: 72-129045 readershowncasevalues33K ofmay shouldtomustfrequency determinebe indicated,be have used. -determining little whichByandtrouble following oneit mayRC works duplicatingnetworks, be theseEIA best.necessary values instructions, However,theor betteringexact ofto 27Ktry values in both andthethe predesigned,hobbyistbuildingownstudentperformance instruction, who blocks whose wantspretested claimed. for amateur to toincorporation the set circuits. Theseup designerinterests and circuits testinto who willtypical a arewantssystem, be offeredcircuitsservedready-made and byfor toto thehis requirements.combinations,combined (as inand cascadedsoon)amplifiers,toManysuit of RUFUSoscillatorindividual the units P. -amplifierTURNERmaysystem be 1 AUDIO AMPLIFIERS Contents FETTransformerDegenerativeSiliconGermanium Common common common-coupled common-source -emitter -emittercommon -emitteramplifieramplifier -emitter amplifieramplifier 1411109 HeadphoneFETEmitter source follower amplifierfollower (divider(resistoramplifier biased)biased' 19161714 ABOUT THE AUTHOR AudioPhaseFiveDriverMicrophone -watt mixerinverterfor powerClass handle Bamplifier stage preamplifier 23202019 Rufusandductor to P.hisfield, Turner engineering dating has back had association towide the experiencecrystalwithdetector Sylvaniain the of thesemicon-when 1920s the InductorTunedGated amplifier-transformer -capacitor -tuned bandpassbandpassamplifier amplifier 292724 famedUniversityat1940s. LosDr. He1N34Angeles, Turner earned of germanium Southern wrotehisand B. his A. twoCalifornia. M. degreediode A.of theandwasfrom first Ph.developed California D.practical degrees Statethere transistorfrom College in thethe 2RF,RC -tuned IF & bandstopbandpass DC AMPLIFIERSamplifieramplifierbandstop amplifier 3531 books:Circuits Transistors, (1957). He is Theory the author & Practiceof 30books (1954) and moreand Transistor than 2500 ConventionalBroadcast band 455 RF -kHz amplifier IFamplifier(preselector) 3937 engineerarticles.Dr. Turner in California islicensed andMassachusetts. as a registered professional FETDCSingle currentvoltage455 -tuned -kHz amplifieramplifier 455 IF amplifier-kHz (low-level IF amplifiertype) 444341 DCWideband sourceemittercurrent follower (video) followeramplifier amplifier(power type) 51494845 3OSCILLATORS TEST INSTRUMENTS Transformer -tuned AF oscillator (FET)(PNP) 5356 DC microammeter (NPN)(PNP) 117 PhaseHartleySelf-excitedLight -operated-shift -Type RC RF AF audio AFoscillator oscillator oscillator oscillator 626059 DipTVGeneral-purposeElectronic fieldoscillator -strength DC (PNP) voltmeter field meter -strength meter 124123119118 ConventionalSelf-excitedMultiPierce -frequency crystal 100 crystaloscillator -kHz crystal oscillator oscillator 676564 AudioAFDip frequencyadapteroscillator signal injector (FET)meter 131130125 PowerCrystalMicropowerBeat -frequency AF-type oscillator 100AF oscillator-kHzoscillator oscillator (BFO) 677372 RFLCStepInductance signalcharts -type audio / capacitance oscillator checker 137135132 RelaxationPulseCarrierMultivibrator -generating -operated oscillator AFoscillator oscillator 807580 ElectronicHarmonicStatic detector comparator amplifierloadload (electrometer) resistorresistor for (NPN)frequency(PNP) standards 139140139137 TVSelf sound -modulated -channel RF markeroscillator oscillator 82 CWPhoneAFHeterodyne signal monitor monitor -tracer frequency adapter meter for VOM 148143142145142 4CONTROL AND ALARM DEVICES AFSensitiveElectronicDC wattmetervoltage absorption thermometer calibrator wavemeter 152151150158 Tuned AF analyzer 154 SensitiveHeavy-duty DCDC DC relayrelay relay (NPN)(FET)(PNP) 89849089 CircleSensitizerBrightMetronome -bulbgenerator for stroboscope DC milliammeterfor oscilloscope wheelpatterns 159158157 PhotoelectricTunedACAll -solid-state/ RF AF relay relay Relay DC relay (solar -cell type) 949197 6POWER SUPPLY APPLICATION TouchTemperatureHeavy-dutyPhotoelectric -plate photoelectric relay -sensitiverelay (photofet relay control type) (all solid-state) 10210097 DCVariable voltage DC regulator power supply (shunttype) 164162 SignalCoincidenceHeater invertercontrol relayswitch (manual ("and" adjust circuit) ) 102109106 DC -tosupplyvoltage -DC for inverter regulator tunnel (high(medium(low diodes (series voltage) voltage)voltage)type) 169165 AudiblePhaseIntervalCarrierVisual shifter alarm-failure alarmtimer (lamp alarm flasher) 115113113110 ElectronicConstant -current filter "choke" adapter (high(low level) level) 175172170 7RECEIVERS, TRANSMITTERS & ACCESSORIES Chapter 1 SelectiveStepDiodeSimple -tuned receiver broadcast broadcast broadcast with receiver receivertransistor receiver AF amplifier 177180182 Audio MeterSunAutodyneAllRegenerative -wave -powered -type regenerativeconverter tuning broadcast indicator receiver receiver 188184 transistorThe single circuits -stage AFand amplifier wasoneAmplifiers ranksof the first.among In thisthe application,simplest of LightFrequencyCW transmitter -bulb-beam -typedoubler receiver tuning indicator 188192190 ventionalHerelightthe transistor weight, are aperiodic20 goodaudio typically efficiency, unitsamplifier offers tofrequency andmany circuits, low advantages: power-selective ranging supply units. smallfrom demands. 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