HP-475B-Manual-sn-11 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 OPERATINGANDSERVICINGMANUAL FOR MODEL475B TUNABLEBOLOMETERMOUNT Serial11andAbove Copyr

2、ight1956byHewlett-PackardCompany Theinformationcontainedinthisbooklet isintendedfortheoperationandmain tenanceoCHewlett-Packardequipmentand isnottobeusedotherwiseorreproduced withoutthewrittenconsentoftheHewlett- PackardCompany. HEWLETT-PACKARDCOMPANY 275PAGEMILLROAD,PALOALTO,CALIFORNIA,U.S.A. 475BO

3、Ol-1 RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS FREQUENCYRANGE: POWERRANGE: FITTINGS: POWERSENSITIVEELEMENT: OVERALLDIMENSIONS: WEIGHT: Approximately1000-4000MC(varies withSWRandphaseofsourceandvalue ofbolometerload.) 0.1to10milliwatts(with-hp-Model 430CMicrowavePowerMeter.) InputConnector-TypeNfemale (

4、UG23/U). OutputConnector(bolometerdcconnec- tion)-TypeBNC(UG89/U). TypeNMaleConnector(UG21/U)sup- pliedtoreplacebolometerconnector sothatmountmaybeusedasaconven- tionaldouble-stubtransformer. Selected1/100ampereinstrumentfuse. Sperry821orNardaN821Barretter. WesternElectricTypeD166382Ther- mistor. 18

5、11longx7-3/8widex3-5/811deep. 8pounds. . . Pl :l P. Pl 0- o +- -J lJ1 lJj o o . I . RadioFans.CN 收音机爱 好者资料库 . I . o o t:Q U) r- . . OPERATINGINSTRUCTIONS INSPECTION Thisinstrumenthasbeenthoroughlytestedandinspectedbefore beingshippedandisreadyforusewhenreceived. Aftertheinstrumentisunpacked,itshould

6、becarefullyinspected foranydamagereceivedintransit.Ifanyshippingdamageis found,followtheprocedureoutlinedintheClaimforDamagein Shipmentpageatthebackofthisinstructionbook OPERATION PowerMeasurements ConnectasignalgeneratororothersourceofpowertotheType Ninputconnectorontheendoftheinstrument.Mountafuse

7、, barretterorotherbolometerelementintheoutputconnectoras- sembly(seeparagraphonBolometerReplacement)andconnect aHewlett-PackardModel430CPowerMetertotheTypeBNCout- putconnector.Asubstitution bridgeorothermeansofmeasuring powermaybesubstitutedfortheModel430C.Tunethetwostubs untilamaximumreadingisobtai

8、nedonthepowermeter.Care mustbetakentogetatruemaximumasatsomefrequenciesitis possibletogetafalsemaximumbytuningeachstubindividually. Toinsuregettingatruematch,eitherstubmaybetunedslightly inonedirectionandthenintheotherwhiletheotherstubisrocked backandforth.Thiswillyieldthetruemaximum.Dialsarepro- vi

9、dedonthetuningknobssothatinproductiontesting,theapproxi- matestubpositionsforeachfrequencymaybenoted.Thisallows rapidtuningandinsuresusingthebestcombinationofstubsuscep- tancesatallfrequencies. Atthehigherfrequencies,itisusuallypossibletoobtainthesame combinationofsusceptancesatdifferentdialreadings

10、.Thisoc- cursbecausethestubsaremorethanone-halfwavelengthlong andthesusceptanceobtainableatonesettingisalsoobtainableat allpointswhichareamultipleofahalf-wavelengthawayfrom thatsetting.Occasionallyaslightdifferenceinthepowerread- ingsatthesedifferentdialsettingsmaybenoted.Forhighestac- curacy,thelow

11、estdialsettingattainableshouldbeused. Atfrequencieswheretheavailablestubtravelisnolimitation,it isalwayspossibletomatchagivenloadtothelinewithtwocom- binationsofstubsusceptances.Atsornefrequenciesthesuscep- tancesrequiredbyonecombinationcanbecomegreatenoughthat -1- stublosseswillcausethepowerreading

12、tobelessthanforthe othercombination.Thiseffectshowsupatthelowendofthe 475Brangeandrarelyamountstomorethanadb.Careshould betakentofindthepropercombinationforgreatestaccuracy. OperationasaDouble-StubTransformer WhentheModel475Bistobeusedasadoublestubtuner,itis necessarytoremovethebolometerandTypeBNCou

13、tputconnec- torandsubstituteaTypeNconnector.Changingtheseassemblies isdoneasfollows: 1.Unfastenthetwothumbscrewsandremovetheoutput connectorassembly. 2.Pulloutthesplit-diskbolometersocketandinstrument fuse.Thecapacitor,whichisalaminateddisk,will comeoutwiththeinstrumentfuse. 3.Unscrewthesplit-cupbol

14、ometersocketandremove fromtheholeinthecenterconductor. 4.RemovethefourPhillipsheadscrewsalongthebottom edgeofthecabinetandliftoutthebottomplate.Remove thecenterconductorDandthemaleinputconnectoras- semblyfromthebottomplate. 5.ScrewthecenterconductorDintotheholefromwhich thebolometersocketAwasremoved

15、. 6.Slipthemaleconnectorassemblyoverthecentercon- ductorandfasteninplacewiththetwothumbscrews. Thiscompletesthechangetoadoublestubtuner. 7.Whenreturningtheinstrumenttoitsoriginalcondition, reversetheaboveprocedure.Becarefultoassemble thecapacitordisktotheendofthestubsothatthe shouldersideofthediskfi

16、tsintotheendofthestub. Pushthefuseintothesplit-cupbolometersocketasfar asitwillgo. Theopeningsattheterminalendsofthestubsareidenticalsothat themaleconnectorassemblyorfemaleinputconnectorassembly maybeusedoneitherstub.Thisalsoappliestotheoutputcon- nectorassembly. BolometerReplacement TheModel475Biss

17、hippedfromthefactorywitha1/100ampere instrumentfuseinstalledinthebolometersocket.These1/100 ampereinstrumentfuses,suchasthe#MJB-1/100fusemanu- -2- oj:. -.I U1 to o o - I - facturedbytheBussmanMfg.Co.,St.Louis7,Mo.,haveproven tobefullyequivalentinperformancetobarrettersuptoabout 3500MCwhenusedinatuna

18、blemount.Abovethisfrequency, powerreadingswillbelowerwiththefusethanwiththebarretter. Theerroramountstolessthan.5dbat4000MC. WhenusingtheModel475BinconjunctionwiththeModel430C,it isnecessarythatthe1/100ampereinstrumentfusehavesuitable resistancecharacteristics.Afusecanbeusedonanyrangeof theModel430C

19、onwhichitispossibletosetthemetertozero. Mostfusesnotusableonthetoprangewillbeusableonsome lowerranges. SomeofthefusesfailingtozerowiththeModel430Cmaybe treatedtochangetheirresistancecharacteristicsandthusbring themwithintheoperatingrange.Thefuseshavingtoolowresis- tancearerunmomentarilyathigherthann

20、ormaltemperature. Thisresultsinapermanentincreaseinresistance.Thustreated, manyrefectedfusesmaybebroughtintotolerance. Acircuitforrapidlycheckingandtreating1/100amperefusesis shownbelow. COOK o CHECK 1/100 FUSE 0-20MA 1000 7.5V -3- Theprocedureforcheckingandtreatingfusesisasfollows:(Am- bienttempera

21、tureshouldbe25 0 CloCduringthisprocedure.) 1.WithfuseclippedinandDPDTswitchinCHECKposi- tion,pushbuttonandadjust1000ohmpotentiometer untilgalvanometerreadszero(center).Meterindic- atestotalbridgecurrent,halfofwhichiscurrentre- quiredtomakefuseresistance200ohms.Ifbetween 8.50and9.00MA(17-18MAonmeter)

22、fuseisusable.* 2.Ifmetercurrentisbelow17,fusecannotbeused. (Seenotebelow.) 3.Ifmetercurrentisabove18,throwswitchtoCOOK andadjustpotentiometertogiveapproximately12MA onmeter.Checkfuseagain.Repeat,increasing currentcautiouslyeachtimeuntilfusereaches200 ohmsatbetween8.50and9.00MA.Whencooking! temperatu

23、reisreached,thecurrentwillbeseento driftdownward.Donotholdthecurrentformorethan asecondorsoatatime. Twobarretteradaptersareclippedtothebottomplatenearthe maleconnectorassemblyparts.Theseareprovidedtoslipover theendsofaSperrybarrettertobringituptothedimensionsof afuse.Ifdifficultyisencounteredinmount

24、ingthebolometerin .thesplit-diskbolometersocket,itmaybesprungopenslightly withascrewdriver.Donotspringittoofarasthissocketmust makegoodcontacttothebolometer. AcapsuleenclosedbeadthermistorsuchastheW.E.TypeD166382 canbeusedifitisprovidedwithfuseorbarrettertypemountings. Anuninsulatedbeadtype,suchasth

25、eW.E.23A,canbemountedin aburnedoutbarrettercartridgeandused. THEORY Thebolometermountisessentiallyadouble-stubtransformer, usedtomatcha200-ohmloadtoa50-ohmline.Thestubsadd shuntsusceptanceattwopointsandthese,togetherwiththelength oflinebetweenthem,giveimpedancetransformationinamanner *Acurrentof8.50

26、to9.00MAisspecifiedonthefuseforthe Model430Ctoworkatanyambientfrom0to500C.Fuseswhich are200ohmsatcurrentsjustbelowthismaystillworksatisfac- torilyat25 0C onallrangesandiftheydontworkonthe10MW range,maystillworkonlowerrangesbecauseofthegreater rangeofDCavailablethroughzerosetcircuit.Thesolecriterion

27、inanycaseiswhethertheModel430Cmetercanbezeroset. -4- . . . I . o o p;1 l!l r- :- eD ;z: -:Ea ;z: II:l Do II:l R -t -. =x. . Pi-a II:l.Cola II: ;z: :E II:l :;, 10 II:l II: I a CD :N.:,:1*,:I:1: K :K:l:IX:,:I: .:1 o N1IS,I3:J1InOSN :1 oo,j :J.T o 475B8/22/56SerialllanGlabove475BOOl-l INPUTOUTPUT o SLI

28、DING CONTACTS o oPANELCONTROL SCHEMATICDIAGRAMOFMODEL475BTUNABLEBOLOMETERMOUNT TABLEOFREPLACEABLEPARTS NOTE AnychangesintheTableofReplaceablePartswillbe listedonaProductionChangesheetatthefrontofthis manuaL Whenorderingpartsfromthefactoryalwaysinclude thefollowinginformation: Instrumentmodelnumber S

29、erialnumber -hp-stocknumberofpart Descriptionofpart TABLEOFREPLACEABLEPARTS Circuit Ref.Description Knob InputConnectorAssembly: (Female) ConnectorAssembly: (Male) CenterConductorC: CenterConductorD: ThumbScrews: OutputConnectorAssembly: Capacitor: BolometerSocketA: BolometerSocketB: Pane1Plate: Bar

30、retterAdapter: -hp- StockNo. 37-13 475B-95A 475B-34S 475B-34K 475B-34Z 475B-34F 475B-95B 475B-95C 475B-34G 475B-34H 475B-43A 475B-34V Mfl.*&Mfrs. Designation HP HP HP HP HP HP HP HP HP HP HP HP Fuse,1/100amp_(treatedandselectedG28-AHP Thermistor NOTE AnychangesintheTableofReplace- ablePartswillbelis

31、tedonaProduc- tionChangesheetattherontofthis manual. Whenorderingpartsfromthefactory alwaysincludethefollowinginforma- tion: Instrumentmodelnumber Serialnumber -hp-stocknumberofpart Descriptionofpart 211-23HP *SeeListofManufacturersCodeLetter.ForReplaceablePartsTable. -10- CodeLetter A B C D E F G H

32、 HP I J K L M N o P Q R S T U V W X Y Z AA BB CC DD EE FF GG HH II JJ KK LL MM NN 00 PP QQ RR SS TT UU VV WW XX yy zz LISTOFMANUFACTURERSCODELETTERS FORREPLACEABLEPARTSTABLE Manufacturer AerovoxCorp. Allen-BradleyCo. AmperiteCo. Arrow,Hart&:Hegeman BussmanManufacturingCo. CarborundumCo. Centralab Ci

33、nch-JonesMfg.Co. Hewlett-PackardCo. ClarostatMfg.Co. CornellDubilierElec.Co. Hi-QDivisionofAerovox ErieResistorCorp. Fed.Telephone&:RadioCorp. GeneralElectricCo. GeneralElectricSupplyCorp. Girard-Hopkins IndustrialProductsCo. InternationalResistanceCo. Lectrohm,Inc. Littlefuse,Inc. MaguireIndustries

34、Inc. MicamoldRadioCorp. OakMfg.Co. P.R.MalloryCo.,Inc. RadioCorp.ofAmerica SangamoElectricCo. SarkesTarzian SignalIndicatorCo. SpragueElectricCo. StackpoleCarbonCo. SylvaniaElectricProductsCo. WesternElectricCo. WilkorProducts,Inc. Amphenol DialLightCo.ofAmerica LeecraftManufacturingCo. Switcheraft,

35、Inc. GremarMfg.Co. CaradCorp. AnytubehavingRETMAstandardcharacteristics. 90BY013 CLAIMFORDAMAGE IN SHIPMENT The instrument should be testedassoon asitis received.Ifitfails to operate properly,oris damagedinany way, a claim should be filed withthecarrier. A full report of the damage should be obtaine

36、d by the claim agent,andthisreportshould be forwarded to us. We will then advise you ofthedisposition to be made ofthe equipment andarrangeforrepairorreplacement.Include modelnumberand serial numberwhen referring to this instrument for any reason. WARRANTY HewlettPackard Company warrants each instru

37、ment manufactured by them to be freefromdefectsinmaterialandworkmanship.Ourliabilityunderthiswarranty is limited to servicingoradjusting anyinstrumentreturned tothefactory forthat purpose and to replaceanydefectivepartsthereof.Klystron tubes as well asother electron tubes, fusesandbatteriesarespecif

38、ically excluded from any liability.This warrantyis effective for one year after delivery to the originalpurchaserwhenthe instrument is returned,transportationchargesprepaidbythe original purchaser, and when uponourexamination it is disclosed tooursatisfaction to be defective.If the faulthasbeen caus

39、edbymisuseorabnormal conditions of operation,repairs will be billedatcost.Inthis case,anestimate will be submitted beforetheworkis started. Ifany fault develops, the following steps shouldbetaken: 1. Notify us, giving full details of the difficulty, and include the modelnumber and serial number.On r

40、eceipt of this information,wewill give you servicedata orshipping instructions. 2.On receipt of shipping instructions,forwardtheinstrument prepaid, tothe factoryorto the authorizedrepairstation indicated ontheinstructions.Ifrequested, anestimate of the charges will bemadebefore the work begins provi

41、dedtheinstru ment is not coveredbythewarranty. SHIPPING All shipments of HewlettPackard instruments should bemadeviaTruckor Railway Express.Theinstruments shouldbepackedinastrongexteriorcontainer andsurroundedby twoorthree inches of excelsiororsimilar shockabsorbingmaterial. DONOTHESITATETOCALL ONUS HEWLETTPACKARDCOMPANY .eatat?Cl7ntam,ntl/04.anuuac? 275PAGEMILLROADPALO ALTO.CALIF. U.S.A. CABLEI.HEWPACK ,