HP-200B-Brochure-1941 电路图.pdf

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1、RESISTANCErJTUNED AUDIOFREQUENCYOSCILLATORS TheModel200B ANEWPRINCIPLEOFOPERATION LOWDISTORTION CONSTANTOUTPUT LOGARITHMICSCALE NOZEROSETTING SMALLSIZE HIGHOUTPUT ACCURAT,ErJINEXPENSIVErJFLEXIBLE - PALO ALTOHEWLETT CALIFORNIA T-IOO RadioFans.CN 收音机爱 好者资料库 The Model 200BR The HEWLETT-PACKARD Resistan

2、ce-Tuned Oscillators are animportantnewdevelopmentin thecommunication field.Theyaretheresultofa long research programinawellequippedlabora- tory. They have been thoroughlytriedandtestedineveryrespect, bothinthelaboratory andinthe field. The inherent stability and fundamental simpicityofthese new osc

3、illators make it possible forus toproducean instrument which meetsthehigheststandardsofperformanceataverylowprice. USES:These new Resistance-Tuned Oscillators are suitable for almosteverytypeofwork. Their lowdistortion makes them particularly valuableinmaking distortion measurements on audio amplifi

4、ers, broadcasttransmitters, andotherequipment.They provide an excellent sourceofvoltage for accu- ratebridgemeasurements.Theoutputissufficienttodrive signalgeneratorsandotherequipment requiring considerable power.Their wide frequency range also makes them suitable forworkinthe . super-sonic region.

5、These Resistance-Tuned Oscillatorswillsavevaluab!e timeinproduction testing, maintenance, and developmentwork.The frequency driftisnegligibleevenduring the first few minutesofoperation and consequentlynozero adjustmentisnecessary.Theconstantoutputofthese oscillators makes it oasytocheckthefrequency

6、responseofapparatusquickly and accurately. They givelabortorytype performancewith extreme simplicityofoperation. There are onlythreecontrols onthepanel:the main frequency dial,therange selecting switch, andtheoutputvoltage control.Their usefulnessis increaosed because they are smallinsize and lighti

7、nweight.The simplicityofthis new resistance- tunedprinciple andthesturdy constructionofthese oscillators assure youofdependability and con- tinued high quality performance. RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS:The HEWLETT-PACKARD oscillators are designed and builttogive long trouble free service.

8、High quality parts are used throughout, and each oscillatorissubjected to rigid tests before shipment. Four standard models are available.The Models 200A and200Bhave a transformer-coupled output amplifierwhichwilldeliver I watt into a matched load.The Models 200C and 200D have a resistance-coupled o

9、utput amplifiertoprovide uniform output volt- ageover their wide frequency range.These oscillatorsaresuppliedina relay rack mountingasthe200AR,200BR, 200CR, and 2000R, respectively. FREQUENCYRANGE:Model 200A35cps.to35kc. Model200B20 cps.to20kc. Model 200C20 cps. to 200kc. Model20007 cps.to70kc. CALI

10、BRATION:The dialiscalibrated directlyincycles for the lowest range. A switch selects the range andin- dicates the proper multiplying factor.Eachrange covers180degreesonthedial andsothe equivalent scale lengthisfrom 20to30inches on the various models. 200A200B200C2000 RangeI35-350 cps.20-200 cps.20-2

11、00 cps.7-70 cps. Range 2350-3500 cps.200-2000 cps.200-2000 cps.70-700 cps. Range 33500 cps.-35kc.2000 cps.-20kc.2000 cps.-20kc.700-7000 cps. Range 420kc.-200kc.7000 cps.-70kc. STABILITY:Under normaltemperatureconditions the frequency driftislessthan2%even including initial warm-up.Plusorminus20/,0 l

12、ine voltage variations changesthefrequencylessthan 0.2/0No zero settingisnecessaryonthese oscillators. OUTPUT:The Models 200A and200Bwillsupply one watt output into a matched resistance load of 500 ohms, 25 voltsonopen circuit. Special output irnpedances can be suppliedonorder. The Models 200C and 2

13、00Dwilldeliver10volts into a1000ohmload.Theinternal impedance of theoutputamplifierisabout50 ohmsat1000cps. FREQUENCYTheoutputvoltage of the Models 200A and200Bisconstant withinplusorminusIdecibel from RESPONSE:20cps.toI5kc. Theoutputvoltage of the Model 200CisconstantwithinplusorminusIdecibel from2

14、0cps. to 150kc. Theoutputvoltage of the Model 2000isconstantwithinplusorminusIdecibel from 7 cps.to 70kc. DISTORTION:The totalrms.distortion containedinthe wave-form of the various modelsiswithin the following limits: HUMVOLTAGE: POWER SUPPLY: TUBES: MOUNTING: Model 200ALessthanI/,odistortion above3

15、5cps. Model200BLessthanI% distortion above35cps. Model 200CLessthanI/,odistortion from20cps.to150kc. Model 2000LessthanI% distortion above10cps. Thehumvoltageislessthan0.1% of themaxi:rum output voltage. I15volts -60cycles -50 watts. Models 200A and200BI 6J7, I6F6,I6F5,I6V6,I5Z4. Models 200C and 200

16、02 6J7, I6F6,I6V6,I5Z4. Thecabinetmodels are mountedinanattractive steel cabinet finishedinwrinklegrey.Thepanels are wrinkle grey finish with machine engraved designations. The relay rack mounting fitsthestandard19relayrackwith%spacing.Thispanelis3/16 thick finishedinwrinkle grey with machine engrav

17、ed designations.Thedust cover mountsonthe chassis andisremovable from the rear. Model 200A 200B 200C 200D 200AR 200BR 200CR 200DR Mounting Cabinet Cabinet Cabinet Cabinet RelayRack RelayRack RelayRack RelayRack LengthHeightDepth 1689 1689 1689 198%II 1979 1979 1979 198%II Pricesarenet,completewithtu

18、bes,f.o.b. Palo Alto,California. Pricesanddatasubiecttochangewithoutnotice. PatentsAppliedFor. HEWLETT-PACKARDCOMPANY 481PAGE MILL ROAD PALO ALTO,CALIFORNIA Weight 32# 32# 30# 32# 35# 35# 35# 37# Price $85.80 85.80 115.00 125.00 90.80 90.80 120.00 130.00 June2,1941 RadioFans.CN 收音机爱 好者资料库 1 PRINCIPL

19、EOFOPERATION:TheseResistance-TunedOscillatorsconsistofastabilizedamplifier withregenerationsuppliedthroughafrequencyselectiveresistancecapacitynetwork.The amoli- fierincreasestheeffectiveQofthis network sothattheoscillationfrequencyisstable.Thether- maldriftcanbemadeextremelysmallbyusing lowtemperat

20、urecoefficientelementsinthenet- work.Furthermore,thethermaldriftisnotmagnifiedasitisinthecaseofabeat-frequency oscillator.Toincreasetheusefulnessofthisresistance-tunedprinciplewehavedevelopeda uniquebalancingcircuitwhichautomaticallyselectstheproperoperatingpointfortheoscillator. Thisbalancingcircui

21、tkeepthedistortionata low valueatalltimessothatno manualadjustment oftheoperatingpointisnecessary.Thefrequencyistunedovera10toIrangebymeansofa variablecondenser.Therangeismultipliedindecimalstepsbyselectingtheresistorsinthere- generationnetwork. DISTORTIONANDAMPLITUDE CHARACTERISTICS OF RESISTANCE-

22、CAPACITY 2 OSCILLATOR I. L % _.- 0 10 . a . . . : a morestableandproduceslessdistortionthantheprin- 30000 0000 30010003000 FREQUENCYINC.P.S. TypicalCharacteristics 10030 This newoscillatorisfundamentally ciplenowordinarilyusedfor variablefrequencyaudiooscil- lators.A tYpica Idistortion andfrequencyc

23、haracteristicis shownattheright.Thisisthe actualperf0rmanc eofthe Model200Aovermostofthe frequencyrange.Withfullout- putthedistortionrises some- whatatthelowerfrequencies becauseoftheoutputampli- fier.Atlessthanfulloutput thedistortionofatypicaloscil- latorisas showninthiscurve. SPECIALOSCILLATORS:T

24、hisresistance-tunedprincipleisexcellentformanyspecialpurposes. Thefrequencycanbeextendedseveraldecadestothelowerradiofrequencyregion.Excellent oscillatorsforstroboscopicworkcanbemadebecausethefrequencyisstableoverlongperiods oftime.Specialandmoreaccuratecalibrationscanbemade.Ifyouhaveanyproblemsrequ

25、ir- ingaudioorsuper-sonic oscillators we inviteyourinquiry.Wearepreparedtosupplyspecial oscillatorsatattractiveprices. WARRANTY:Wewarranteachinstrumentsoldbyustobefreefromdefectsinmaterialand workmanshipforaperiodofoneyearfromdateofpurchase.Ourobligationunderthis war- rantyislimitedtorepairingorreplacinginstrumentsorpartsthereofwhichprovetobedefective I.J,/ourexamination. m:L1VERY:Deliverywillbemadeonthecabinetmodelsoneweekfromreceiptoforderandon therelay rackmodelstwoweeks fromreceiptoforder.Whenfullpaymentaccompaniesorder transportationchargeswillbepaidtoanywhereintheUnitedStates. -