HP-205AH-Manual-sn-223 电路图.pdf

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1、 HP Archive This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! On-line curator: Glenn Robb This document is for FREE distribution only! RadioFans.CN 收音机爱 好者资料库 . INSTRUCTIONANDOPERATINGMANUAL FOR MODEL205AH AUDIOSIGNALGENERATOR Serial223andAbove

2、HEWLETT-PACKARDCOMPANY 395PAGEMILLROAD,PALOALTO,CALIFORNIA,U.S.A. RadioFans.CN 收音机爱 好者资料库 AUDIOSIGNALGENERATOR MODEL205-AH ELECTRICALSPECIFICATIONS 1.FrequencyRange.Twobands.1KCto10KC 10KCto100KC CalibrationofMainDial.Variation.1to10KG Accuracy.2% 2.MaximumPowerOutput.5wattsintoma.tchedload. 3.Disto

3、rtion.Lessthan1%distortionat1wattintomatchedload. Approximately3%distortionat5wattsintomatchedload. ,4.OutputImpedances.50,200,500, 5000 oh-ns. (centertapped,ungroundp-d) 5.FrequencyResponse.t1db from 10KCreference, 6.FrequencyStability.t10%linevoltagechangescauseno morethan .tt%variationafterthourw

4、armupperiod. HumLevelAtleast65 db belowoutputvoltage,or65db below 1 MWat 500 ohms,whicheverisgreater. 8.OutputAttenutionRange.Oto110 dbin1dbsteps. Accuracy.tt dbinfirst80d; 3dbinlast30dj. 7. 9.OutputMeterCalibration.Volts:Decibels. Volts(500ohmsoutputimpedance)60V,fullscale. Decibels(0db-lMWinto500o

5、hmload)20to+37db. lO.PowerSupply.110to120V,60cycles,140watts. 11.FuseRating.Itamperes. RadioFans.CN 收音机爱 好者资料库 HECHANICALSPECIFG.4TI.QNS CabinetModel:OverallDimensions,22-19/32x13-3/16x11-5/8in.m3.:;. PanelSize.19 xlOtin. PanelFinish.GreyWinkleEnamel. CabinetFinih.LightOak. RelayRackModel:PanelSize.

6、19 xlOtin. DustCover17-3/16x12-1/8x10-3/16inmax. Finish.GreyvJrinkleEnamel. CIRCUJDESCRIPTION The Model 205-AH AudioSignalGeneratorconsistsofaHewlett- Packardresistance-tunedoscillatorincombinationwithanoutput meter,anattenuator,andanimpedance-matchingsystem. TheQillatoctionconsistsofaresistance-cou

7、pledampli- .fierwithpositivefeedbackthroughafrequency-selectiveresistcr- capacitorcombination,andnegativefeedbackthroughanon-linearre- sistancewhichactsasanautomaticamplitudecontrol.A6J7and a 6F6areusedasoscillatortUbes.Aregulatedpowersupplyisused asa dc powersourcefortheoscillatorsection,toincrease

8、thefre- quencystability. Inthepoweramplifiera6J7amplifiertubeand a6J5phasein- vertertUbeareusedtodrivetwotriode-connected6L6GoutputtUbes. Thetertiarywindingontheoutputtransformerisusedfornegative feedback.Thisamplifieroperatesintoa 500chmline.Theoutput metermeasurestheoutputvoltageofthe5wattpoweramp

9、lifieracross the500ohmcircuit.Thismeterisadiodecircuitandisofthe averagereadingtype,calibratedtoreadthor.m.s.valueofthosine wave. Followingtheoutputmeteraretwobridged-Tatteatorsone having100 dbofattenuationin10 dbsteps,and onehaving10 dbof attenuc.tionin1 dbsteps.The 500ohmcircuitthenfeedsaline matc

10、hingtransformer.Thistransformerhasoutputimpedancesof50, 200,.:500,and 5000 ohms,allcentertapped.Theseareselectedby theimpedanceswitchonthefrontpanelneartheoutputtermir-als. ItisnecessarythattheattenuatorsbecorrectlyloadedfCI themeteringandattenuationsystemstooperateproperly.Incases wherethegenerator

11、isworkingintoamatchedload,theoperation willbecorrect.Wherethegeneratorisoperatingintoahighim- pedance,theloadbuiltintotheinstrumentshouldbeused.This loadisa 500ohmresistance,whichcanbeswitchedacrossthe500 ohmtransformerwindingby aswitchonthefrontpanel. Page3 OPERATION Thisinstrumenthasbeencarefullyt

12、estedandadjustedattha factoryandshouldneednofurtheradjustment.The powerswitchmay beturnedon andiftheinstrumentisoperatingproperly,avoltage ofatleast50voltsat500ohmsoutputimpedancewillbeobtained overthefrequencyrange1to100KC. The volumecontrolonthefrontpanelisusedtosettheout- putvoltagelevelontheoutp

13、utmetertothedesiredvalue. Theoutputfrequencyisselectedbythemaindialbehindthe frontofthepanel.Thisdialiscalibratedinkilocyclespersecond forthelowestfrequencyrange. Thefrequencyrangeswitchbelowandtotheleftofthisdial indicatesthepropermultiplyingfactortobeusedonthemaindial calibration. Iftheoutputmeter

14、isheldatafixedsettingthevoltageat theoutputterminalswillbeconstantovermostofthefrequencyrange. Theoutputmeterhasbeensettoreadthevoltageatthe500 ohmoutputterminalswiththesystemloaded.Thevoltageattheout- putterminalsisreducedbytheattenuatorsetting,orchangedbythe impedancelevelused.Whentheattenuatorsar

15、esetatzero,thefol- lowingmultiplyingfactorsapplytothemeterreading: ImpedanceMeterMultiplyingFactor 500ohms.1.0 5000ohms.3.16 200ohms.632 50ohms.316 Theattenuatorsarelocatedontheright-handsideofthepanel. Atableofoutputvoltageratiosforvariousattenuatorsettingsfol- lows.Notethattheattenuatorsmust bepro

16、perlyloadedattheout- putoftheinstrumentforthistabletoapply. AttenuatorSettingMeterMUltiplyingFactor 0 0 c . LO .5 .316 .1 .05 .0316 .01 .005 .00316 .001 .0005 .000316 .0001 . . . . . . . . o0 6 10 20 26 30 40 46 50 60 66 70 80 Page4 Outputimpedancesof50,200,500,and 5000ohmsarcprovided. Thesewindings

17、arecentertappedtoprovideimpedancesof12.5,50, 125,and 1250ohmsfrom onesidetocentertap.Theoutputterminals arebroughtouttothreebindingposts.Afourthbindingpost,con- nectedtoground,isprovidedforgroundingtheoutputsystemif necessary.The impedancematchingswitchislocatednexttotheout- putterminalsonthepanel.A

18、secondtablefollows,indicatingthe outputvoltagecorrectionfactorfordifferentoutputimpedances: Impedance 50ohms 200ohms 500ohms 5000ohms . . . OutputVoltage Subtract10db Subtract4db NoCorrection Add10 db M A I NTENA N C E Properoperatingvoltagesareshown onthecircuitdiagram. Thefrequencycalibrationwillo

19、rdinarilyremaincorrect withoutadjustment.Shoulditbenecessary,however,toadjustthe trackingofthemainfrequencyselectingdial,anaccuratesourceof frequencymustbeusedforcomparison.Setdialto1KC,range switchtoXl.Noteoutputofoscillatorat1KC,thensetto10KC ondial.Adjustoscillatorfrequencyto10KCbymeansofC3(see c

20、ircuitdiagram)andatthesametimeadjustthevoltageoutputto bequaltothatobtainedat1KConthedial,byadjustingthe compensatingcapacitorCl.Thisrequiressomemaneuvering,asthe settingsareinter-dependent.Checkoutputat1KCagain,tomake _sureithasnotchanged.Ifithas,readjustoutputandfrequency at10KCtomatch.Iftheinstru

21、mentstilldoesnottrackproperly, ,theresistorshaveprobablychangedvalue.Returngeneratortothe )factoryforrangeswitchreplacementandrecalibration. ( Thedistortioninthisinstrumentshouldbemeasuredperi- odically.PoortUbeswillcauseanincreaseintheharmoniccontent oftheoutput,andifthisrisesabove1%(40 db)at1watto

22、utput, thetUbesshouldbereplaced.Anyofthetubesarecapableof causingdistortion. Page5 Mazda lampfailure:Shoulditbenecessarytochangethis lampbecauseofunstableoutputorfailuretooscillate,adiustthe outputvoltageoftheoscillatorsectiontoapproximately18volts. Setdialto1KContheXlfrequencyrange,connectahighimpe

23、dance voltmeterfromthejunctionofC3andR17toground,andvarythe paddingresistorR8onthenegativefeedback.Addresistanceto raisevoltage,andviceversa. Theoutputmetermaybecheckedagainstanexternalmeter, andifnecessaryitscalibrationcanbecorrectedbyadjustingR29 50rbyreplacingT7(6H6). Thedistortionoftheoscillator

24、sectionshouldbe 0.3% (50db)orlessat10KC. 1 ThefuseisaItamperecartridgelocatedontheunderside Jofthechassis,nexttothepowercord.Iffusefails,theinstru- mentshouldbecarefullycheckedtoascertainthecauseoftheover- _load.Donotreplacewithafuseofhigheramperage,orshortthe lclipsonthefuseblock. Ingeneralthisinst

25、rumentshouldbethoroughlycleanedevery sixmonthstoremoveaccumulateddust.Atthesametime,theme- chanicaldriveshouldbecleanedandlubricatedwithalightoil. Page6. LISTOFCOMPONENTPARTS MODEL205AH PowerTransformer OutputTransformer Line-matchingTransformer Filterchoke,6hat125MA Filterchoke,6hat125MA Meter,1mil

26、liamp Frequency-determiningrangeswitch ACpowerswitch,SPST Impedancematchingswitch Loadswitch,SPST mica500 V Airpadder 4-gang4-section variablecapacitor airpadder 50Velectrolytic 600 Vpaper 600 Vpaper notassigned 600 Vpaper 600 Vpper 600 Vpaper 600Vpaper 600 Vpaper 600 Vpaper 600 Vpaper 600Vpaper 600

27、 Vpaper 600 VpaJ;er circuitatfactory circuitatfactory 100mmfd 530mmfd easec. 25rnmfd Attenuator,500 ohm,0-10db Attenuator,500 ohms,0-100db 6-8v,.15lPS,Mazda 1!amps,non-renewable 50mmfd 20 mfd) 10mfd) .1rnfd .003 Thisreference .5rnfd .1rnfd 2000mmfd .05mfd .05mfd 4mfd 4mfd 4mfd 4rnfd 4mfd Valueselect

28、edto Valueselectedto Cl C2 c3 c4 c5a C5b c6 C7 c8 C9 CIO Cll C12 C1 Cla c15 c16 C17 CIS C19 C20 Sl S2 . Al A2 PilotLamp Fuse Tl T2 T3 L1 L2 Ml o - .) .-y- I 7 LISTOFCOMPONENTPARTS MODEL205-AH U 7 I 7 I o R1 R2 R5 R6 R7 R8 R9 RIO R11 R12 R1,3 R14 R15 R16 R17 R18 R19 R20 R21 R22 R2,3 R24 R25 R26 R27 R

29、28 R29 R30 R31 R3,3 R34 R35 R36 R37 R,38 R40 R41 VI V2 v5 v6 v7 vB v9 V10 Vll 14.5K 145K 145K 14.5K Lamp 56K 56K 3K 1000ohms 56K 220 K 220Ohms Thisreference Thisreference 10K 5K 25K 3300ohms 750K 56K 100K 47K 1megohm 4700ohms 47 K 270K 270 K 500oh.rns 27.5K 33ohms 250ohms 560K 15K 47 K 25K 33K 500oh

30、ms 1000ohms 270ohms 6J7 6AG7 6J7 6J5 6L6G 6L6G 6H6 5T4 6sQ7-GT 6L6G VR150 1INcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 3WMazda 1 Wcomposition 1 Wcomposition 1 Wwirewound 1 Wwirewound;variable 1 Wcomposition 1INcomposition 1 Wcomposition notassigned notassigned 1 Wcomposition 10INwirow

31、ound variablecarbon 1 Wcomposition 1INcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 1 Wcomposition 10INwirewound 1 Wwirewound 1VVwirewound 10 Wwi:vewound 1 Wcomposition 2 Wcomposition 1 Wcomposition variablecarbon 1IVcomposition

32、25Wwirowound 10Wwirewound .Wcomposition 726+910M-S-tOI 31049 MA IHll J I SOOO,.T3 =:!I 0I Jc-I -,-+-I:-jl!J -=r-1 4Q3I r4_OO_ 1+- o0r - r-+-p ,.o-.53u L?o- 0 ;- t#;V5I ceo , J,eov OU;PuT CT9 I .Azv . i,c-: .00. r- ! . -, a. . o ., L.c: o61.6 r:- ,- S .IIC ol:AOV AVII ?:Iv., -, ;:.,1#)V4 r-r-S_ _6tCJ

33、 I.OS._ NI.y; ,8 -.10:;! _1.0I0: J1 .: 00rn.o. r.lov. ,fij-,-J o .0 -. . ;:;=. u. : CO 5),. !l1., . no C. .11 0: I lJ 571CI uo () .zoo i . 1000 F- V2. a67 TI H Ig II .x I L-.JIII 51I II.- II3I 60! II3 11453W:WE:OFROWREAR C2-4KC.TfCo 530jl.Jt./SCl1ON PI AO,JUSTE.OT.FACTOfOIY SCHEMATICDIAGRAMOf-hp-MOD

34、EL205AHSIGNALGENERATOR . CLAIMFORDAMAGE IN SHIPMENT . Theinstrumentshould betestedassoonasitis received.Ifitfailsto operateproperly,oris damagedinanyway, a claim should be filedwiththe carrier.A fullreportofthedamage should be obtainedbytheclaim agent, andthisreportshould beforwardedtous. We willthe

35、nadvise youofthe disposition to be made oftheequipmentandarrangeforrepairorreplace- ment. Include model number,typenumberandserialnumberwhenreferring tothisinstrumentforanyreason. WARRANTY Hewlett-Packard Companywarrantseachinstrumentmanu- facturedbythemto befreefromdefectsinmaterialandwork- manship

36、.Ourliabilityunderthiswarrantyis limitedtoservicing oradjustinganyinstrumentreturnedtothefactoryforthat purposeandtoreplaceanydefectivepartsthereof(except tubes, fuses andbatteries).Thiswaantyis effectiveforoneyarafter deliverytotheoriginalpurchaserwhentheinstrumentis re- turned,transportationcharge

37、s prepaIdbytheoriginalpur- chaser,andwhich uponourexamination is disclosedtooursatis- factiontobe defective.Ifthefaulthasbeen causedbymisuseor abnormal conditions of operation,repairswill be billedatcost. Inthiscase,anestimate will be submitted beforetheworkis started. Ifanyfaultdevelops,thefollowin

38、g steps should betaken: 1.Notifyus, giving full details ofthedifficulty,andinclude themodel number,typenumberand serial number. On receiptof thisinformation, we will give you service instructions,corship- ping data.; 2.On receipt of shipping instructions, forwardtheinstru- mentprepaid, and repairs w

39、ill be madeatthefactory.Ifre- quested,anestimate ofthecharges will be made befor,ethework begins providedtheinstrumentis not covered bythewarranty. SHIPPING All shipments ofHewlett-Packardinstrumentsshould be made via Railway Express. Theinstrumentsshould .bepacked in a wooden boxandsurroundedbytwot

40、othreeinchesofexcel. siororsimilar shock-absorbing material. DONOT HESITATE TOCALLONUS HEWLETT.PACKARDCOMPANY .I!aJratr,?C2!Jdtrum,dfiref;,.dalld.5!iUUNIt:,? 395PAGEMILLROADPALOALTO,CALIF. l LISTOFMANUFACTURERSCODELETTERS FORREPLACEABLEPARTSTABLE CodeLetter A B C D E F G H I J K L M N o P HP Q R S T

41、 U V W X Y Z AA BB CC DD EE FF GG HH II JJ ZZ Manufacturer AerovoxCorp. Allen-BradleyCo. AmperiteCo. Arrow,HartandHegeman BussmanManufacturingCo. CarborundumCo. Centralab CinchManufacturingCo. ClarostatManufacturingCo. CornellDubilierElectricCo. ElectricalReactanceCo. ErieResistorCorp. FederalTeleph

42、oneandRadioCorp. GeneralElectricCo. GeneralElectricSupplyCorp. Girard-Hopkins Hewlett-Packard IndustrialProductsCo. InternationalResistanceCo. Lectrohm,Inc. Littelfuse,Inc. MaguireIndustries,Inc. MicamoldRadioCorp. OakMfg.Co. P.R.MalloryCo.,Inc. RadioCorp.ofAmerica SangamoElectricCo. SarkesTarzian SignalIndicatorCo. SpragueElectricCo. StackpoleCarbonCo. SylvaniaElectricProducts,Inc. WesternElectricCo. WilkorProducts,Inc. Amphenol DialLightCo.ofAmerica LeecraftManufacturingCo. AnytubehavingRMAstandardcharacteristics