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1、4SEPTEMBER1952 .-*-3.;.L.;./f!.:.:;.;i_-L.-.:.L.-.,;:;._ AN16-45-223 HANDBOOK OVERHAULINSTRUCTIONS RADIORECEIVER MODELSP-600-JX (HAMMARlUND) PUBLISHEDUNDERAUTHORITYOFTHESECRETARYOFTHEAIRFORCE ANDTHECHIEFOFTHEBUREAUOFAERONAUTICS L-_-*- DArcyPtg.!lAS,Jacksonville,Fla.;NAS,Norfolk,Va.;NAS,SanDiego, Cal
2、if;NAS;Seattle,Wash.;NASD,ASO,Guam;NASD,Philadelphia,Pa. ForlistingofavailablepublicationsseeNavalAetonauticPublicationsIndex(NavAet00-500). USAF AN16-45-223 TABLEOFCONTENTS SectionPageSection Page IDESCRIPTIONANDLEADING PARTICULARS 1-1.General. .1 1-3.PertinentInformation.1 IIISPECIALIZEDMAINTENANC
3、EANDREPAIR 3-1.General.3 3-5.SpecializedMaintenanceofParts3 IISPECIALOVERHAUL TOOLSANDTEST EQUIPMENT 2-1.SpecialTools. .2 2-3.SpecialTestEquipment.2 IVDISMANTLING AND DISASSEMBLY 4-1.PreliminaryProcedure.4 4-2.DismantlingofTuningUnitAssembly4 4-4.DisassemblyofGearTrainAssembly6 4-5.ChassisDisassembl
4、y.6 13 13 13 13 VIIREPAIRANDREPLACEMENT 7-1.General. 7-2.SwitchBaseandSpringAssembly 7- 3.SelectivitySwitch 7- 4.Retropicalization. VIII REASSEMBLYANDTESTINGOFSUB- ASSEMBLIESANDASSEMBLIES 8-1.Reassembly.14 8-2.ReassemblyofTuningUnitAssembly14 8-3.ResolderingandRetropicalization15 8-4.TestingofSubass
5、embliesand Assemblies15 IXREASSEMBLYANDTESTINGOF COMPONENTS 9-1.Reassembly.15 9-2.ReassemblyoftheChassisand TuningUnitAssembly15 9-3.ReassemblyoftheChassisand PanelAssembly16 9-4.ReassemblyoftheRadioReceiver16 9-5.ReassemblyoftheRFTuners16 9-6.Testing.17 XFINAL ASSEMBLY 10-1.General.17 XIINSPECTIONA
6、NDTESTING 11-1.General.17 11-2.MinimumPerformanceandTest Values17 INDEX18 7 7 7 7 VCLEANING 5-1.Overall. 5-3.ElectricalParts. 5-5.MechanicalParts 5-8.PreservationAfterCleaning. VIINSPECTION 6-1.General.8 6-3.InspectionTechnique.8 6-4.ReceiverAbnormalities.8 6-5.ReceiverInspection8 6-8.SubassemblyIns
7、pection.8 6-10.PartsInspection.8 6-29.FunctionalMechanicalParts12 6-30.MechanicalPerformanceStandards12 6-31.LifeoftheReceiver12 6-32.ServiceLimits. .12 LISTOFILLUSTRATIONS FigurePageFigurePage 1-1.RadioReceiver,ModelSP-600-JX.2-3.SpecialToolstoReassembleTurret RackMountings.iiRotorAssembly. 2 2-1.S
8、pecialToolstoReassembleRF2-4.SpecialToolstoReassembleGear StripAssembly.2TrainAssembly. 2 2-2.SpecialToolstoReassembleTuning4-1.GearTrainAssembly,ExplodedView . 5 UnitShieldAssembly2 LISTOFTABLES TablePage 2-1. 9-1. SpecialToolsRequiredforOverhaul Identificationofther-fTuners. 1 16 AN16-45-223 Figur
9、e1-1.RadioReceiver,ModelSP-600-JXRackMountings ii AN16-45-223 SECTION I DESCRIPTION AND LEADING PARTICULARS Section I Paragraphs1-1to1-4 1-1.GENERAL.1-3.PERTINENTINFORMATION. 1-2.Thispublicationcomprisesoverhaulinstruc- tionsfortheRadioReceiver,ModeISP-600-JXrack mounting(Seefigure1-1.),manufactured
10、bythe HammarlundMfg.Co.NewYork1,N. Y.There- ceiver,designedfordirectmountinginastandard 19-inchrelayrack,isa20-tubegeneralpurpose radiocommunicationreceiverwith aself-contained stabilizedpowersupplysuitedtooperatefroma singlephase50-to60-cps,90to270volta-csource. Itprovidesforthecontinuouslyvariable
11、orcrystal controlledfixedfrequencyreceptionof anyradiofre- quencycarrierinthe0.54to54.0mefrequency range.Therotaryturretwhichhousesthesixfre- quencybandsofthereceiver,inassociationwiththe gear-traindrive,providefortheexcellentmechani- calstabilityforwhichthereceiverisknown.Also, itsprecisemechanical
12、constructionenablesfullad- vantagetobederivedfromthecrystalfilterincor- poratedinthei-famplifierofthereceiver.There- ceiverfunctionalcircuitryismostlycontainedinsub- assemblies,allof whichmaybesubjectedtoindivi- dualreplacementwhenevertheneedarisesforre- ceiverrepair.Thereceiverisdesignedforfixed an
13、d/ormobileoperationalactivitiessuchasareen- counteredatenclosedbaseorfieldstations,onship- board,orwhenairborne.Suchactivitiesmaybe subjecttowiderangesintemperatureandhumidity sincethereceiverisadequatelyconditionedfortropi- caluse.Thereceiverisfullyshieldedtokeepits radiationcharacteristicstoapossi
14、bleminimum. 1-4.Theradioreceiverissuitedtooperateinsingle ormulti-receivertwo-wayoperationalactivities.Any activityrequiresthatcertainauxiliarycomponentsbe associatedwiththereceiver.Apartfromthe phone jackcontainedinthefrontpanelof thereceiver,all thereceiverinter-connectingmeansarelocatedon therear
15、apron.Therearapronalsocontainstwo fuseholders,oneforathreeamperecartridgetype fuseinserieswiththepowertransformerprimary winding,andtheotherforaduplicatespare.The powertransformersecondaryplatewindingisfused by athree-eighthsamperepigtailtypefusesoldered betweenthetransformerterminal11andchassis gro
16、und.Thefrontpanelofthereceivercontainsall thereceiveroperatingcontrols.Allthereceiverad- justmentcontrolsarelocatedontherearapron.The coiladjustabletuningcoresandtrimmercapacitors usedtoalignthereceiver,andtheadjustmentcon- trolsontherearapron,maintaintheiralignmentand adjustmentsettingsforlongperio
17、dsoftime.Through theuseofvarioustypesofsprings,allthereceiver adjustablefixedand movingpartsareprovidedwith positivepositioningandoperation.Also,flatsprings areusedontherotaryturretassemblytoprovidefor electricalgrounding.Thereceiverr-fcoils,r-f chokes,andallsolderedconnectionsarefungicidal varnishe
18、dfortropicalization;also,allmetalpartsin contactconformtotheelectrochemicalseriesofele- mentssothatcorrosioniskepttoapossiblemini- mum.Inviewofthefactthatallpossibleprecau- Table2-1.SpecialToolsRequiredforOverhaul Figurealso,havingdisassembledtheoctalsocket, thebareelectricalwirecommontothesixcrysta
19、l socketsisunsolderedsubsequenttotheremovalof thecrystalsocketplatecarryingthecrystalsockets. Theaudiofilterassemblyisdisassembledsubsequent toitsdismantlingasaunit. AN16-45-223 SECTION V CLEANING SectionV Paragraphs5-1to5-12 5-1.OVERALL.5-8.PRESERVATIONAFTERCLEANING. 5-2.Theradioreceivermaybeblowno
20、utwithcom- presseddryfilteredairatapressureofapproxi- mately100lb/sqin.Accessiblepartsmaybewiped with acleancloth.Not tooreadilyaccessibleparts maybedustedwithasmalldrybrush. 5-3.ELECTRICALPARTS. 5-4.Whentheradioreceiverisdismantledandits subassembliesaredisassembledallwiredelectrical partsmaybeblow
21、nout,wiped,anddustedasoutlined above(Refertoparagraph5-2.),fortheoverallre- ceiver.Theairpressureatthesubassemblyorpart maybedecreasedbyincreasingthedistancebetween theairnozzleandthework. WARNING Weargogglestoprotecteyesfromdust. 5-5.MECHANICALPARTS. 5-6.Allmechanicalpartssuchasthechassis,side plat
22、es,shields,screws,etc.,maybecleanedby brushingwithFederalSpec.VV-K-211bKeroseneor FederalSpec.O-C-141Carbon-Tetrachloride.To removecorrosionuseNo.000sandpaperaswell, thenwipewithacleancloth. 5-7.Dirtygearsarecleanedbestwithapipecleaner orsmallbrushdippedinanyoneofthecleaningfluids mentioned(Refertop
23、aragraph5-6.).Thevariable airtrimmercapacitorsmaybecleanedbysoaking thembodilyinanyoneofthecleaningfluids(Referto paragraph5-6.),andthenblowingthemout.This appliestother-ftrimmercapacitorsevenwhenas- sembledtotheirisolantitebases,withr-fcoils,re- sistors,andallotherfixedcapacitorsremoved. 5-9.RFCOIL
24、SANDCHOKES.Ther-fcoilsand chokesusedintheradioreceiverarealltreatedby dippinginbakeliteresin,fungicidalvarnishapproved asperJANSpec.JAN-C-l73.Theapprovedthinner usedwiththisvarnishisasperFederalSpec.PTX- 916GradeB. 5-10.FOUR GANG VARIABLEAIR CONDENSER. Thefour-gangvariableaircondenserendbearings are
25、lubricatedatthefactorywithAirForce-Navy AeronauticalSpec.AN-G-15aGrease.Itmaybelub- ricatedintheremoteinstancewhentheneedarises. 5-11.AIRTRIMMERCAPACITORS.Thevariable airtrimmercapacitorsarealllubricatedatthefacto- rywithAirForce-NavyAeronauticalSpec.AN-G-15a Grease. NOTE Donotlubricatethevariableai
26、rtrimmer capacitorseventhoughcleanedasoutlined above(Refertoparagraph5-7.). 5-12.GEAR TRAIN ASSEMBLY.Thereassemblyof theradioreceivergear-trainassembly,(Referto paragraph8-2.),subsequenttooverhaul,requires thattheMilitarySpec.MIL-G-3278Grease,usedat thefactoryforlubricationpurposes,bereplaced. TheMI
27、L-G-3278Greaseisappliedtothefrontbear- ing hub (See36,figure4-1.),totherearbearing machinescrew(42),tothe twoballbearings(20), to thefivetemperedshaftsonthebaseplateassembly (43),totheshaftoftheflywhee1 (22),totheshaftof thegearassembly(16),andtotheshaftofthegear assembly(24). 7 SectionVI Paragraphs
28、6-1to6-6 AN16-45-223 SECTION VI INSPECTION 6-1.GENERAL. 6-2.Theradioreceiverisinspected,bycarefulob- servationandfeel,withregardtoanypossiblephysi- calindicationotherthannormal.Eventhoughthe receivermechanicaldefectappearstrivialitmustbe repairedatthefirstopportunitypresentedsothatit doesnottendtode
29、velopcumulativereceiverabnor- malitiesleadingtoseriousfailure.Assuch,inspec- tioniscloselyconcernedwithpreventivemaintenance wherebyperiodicreceiveroverhaulprovidesfor qualifiedinspectionpersonneltodeterminetheneed fortheimmediaterepairof thereceiver;or,tode- cidethatthenatureofthereceiverabnormalit
30、yisin- significantenough tobetakencareofatalaterover- hauldate. 6-3.INSPECTION TECHNIQUE.Toprovideforthe properinspectionofeachradioreceiver,theinspec- tormustthoroughlyfamiliarizehimselfwiththere- ceiverwithregardtoeachofthefollowingconsidera- tions. a.Determinefirstthenormalappearanceofthera- dior
31、eceiverbycarefullynotingtheappearanceof eachsubassemblyandpartandtheirassembledinter- relationship(Refertoparagraphs4-1thru4-8and8- 1thru8-3.).Untilsuchtimethatthenormaldetail- edappearanceofthereceiveriscommittedtomem- orycomparethereceiverpartbypartwith areceiver knowntobeintheconditioninwhichitle
32、ftthefacto- ry.CarefUllyobservethecolorandfinishofall parts,theirrelativeplacement,thedressingofeach electricalwire,thequalityofthecrimpingofeach solderedwire,theamountofsolderusedtomakea solderedjoint,andthemannerandlocationofthose solderedjointsprovidingforelectricalground.Note thatallsolderedjoin
33、ts,allr-fcoilassemblies,and allr-fchokesaretropicalizedasevidencedbytheir brownishfungicidalvarnishcoating.Notethatthe eightnutsatthe twoescutcheonsonthefrontpanel, the 12nutsatthesixcrystalsocketsonthefrequency controlunit,thebearingsetscrew(See18,figure 4-1.),andeachnutusedtomounteachpinoneachof t
34、he24r-ftunercoilassemblies,iscoatedwithU.S. ArmySpec.3-182ClearVarnish.Thevarnishis usedasanaidtosecureeachnutineachinstance sincenot toomuchstraincanbeusedtotighteneach assembly. b.Determinenextthemannerinwhichthereceiver operatingcontrolsactivatethemechanicalmeans usedtoperformeachcontrolfunction.
35、Getthefeelof eachcontrolandcommitittomemory.Notethatthe tuningcontrolisflywheelbalancedandthatitisfree toturnevenwhenthetuninglockislocked.Notethat thetwoindicatorsforthemaindialandtheonein- dicatorforthevernierdialallsimultaneouslyindi- catezerodialindicationswhenthefourgangvariable aircondenserisf
36、Ullymeshed.Notethatthemovable maindialfrequencyindicatorpointerlocatesatthe 8 frequencyscaleon themaindialcorrespondingtothe frequencybandindentedandwhosefrequencyrang isthatshown onthedialvisiblethroughthesmall windowcontainedinthefrontpanel.Note themanner inwhichthefrequencycontrolunitcrystalswitc
37、h armandeccentricdriveassemblydrivesthe two switchescoupledtothedriveassembly,theorienta- tionof thedrivearmandtheeffectofthesmallheli- calspringused.Note thespring-returnactionof the meterswitch.Note theextenttowhichthegearson thegearassembly(See31,figure4-1.),meshwith thosetheyengageand theholepro
38、visionin thebear- ingplate(9)togetatone of thescrews(32).Note thatthelubricationusedonthegear-trainassembly isbarelyvisible.Note byfeelthetightnessof the adjustabletuningcoresandtrimmercapacitors,but makesurenottodisturbtheiradjustmentsettings. 6-4.RECEIVERABNORMALITIES.Inspectthere- ceiverwithregar
39、dtoeachofthefollowingpossible categoriesofabnormality: a.AGING.Theaging ofthereceiverisindicated bythesloppyornon-positiveoperationofmovable partswhosenormalfunctionduringmovementor whenindentediscontrolledthroughtheuseofsprings, cams,gears,ballbearings,orprecisebearingfits totruedmachinedshafting.
40、b.BURNING.Theoverheatingofthereceiveris indicatedwhenpartscomprisingitshowdiscolora- tion,blistering,bulging,orsmellburnt. c.LEAKAGE.Theevidenceofoilorinsulating compoundattheterminalsofsealedcontainerparts providetheearliestpossibleevidenceofreceiver leakage.Theleakagemaybeevidenttooatpinholes and/
41、orbreaksinthecontainerenclosedpartitself. d.CORROSION.Theevidenceofreceivercorro- sionistheoxidation(rust)whichformsonsurfaces, screws,nuts,etc.,usuallywheredifferentmetal areasareincontact. e.DUST,DIRT,ETC.Theneedforcleaningthe receiverisevaluatedbestbytheextenttowhichdust, dirt,etc.,hasaccumulated
42、atelectrontubesocket terminals,resistorboards,andothernottooeasily accessiblesolderedjointsandcornersinthere- ceiver. f.LOOSENESS.Theneedfortighteninganysubas- semblyorpartcomprisingthereceiverisevaluated byfeelingthesuspectedloosepartfortightness.In theinstanceofattachinghardwaresuchasnutsand/ orsc
43、rews,considertheassemblytightwhen nomore thana 90degreeturnmaybetakenupintheattaching part.Makesuretoresealthosenutslistedabove (Refertoparagraph6-3.),wheneveroccasionarises totightenanyoneofthem. 6-5.RECEIVERINSPECTION. 6-6.Apartfromthecarefulinspectionoftheradio receiverforphysicaldamageevidentbyo
44、bservation, AN16-45-223SectionVI Paragraphs6-7to6-12 thereceivercontrolsshouldallbetriedtorender assurancethattheyfunctionproperly.Dependenton theinspectionappraisalof thereceiveronreceiptfor overhaul,adecisionshouldbemadeastowhetheror notthereceivershouldbeturnedontodetermine theelectricalcondition
45、ofcertainofitsfunctioning parts,beforedismantlinganddisassembly.When- everthereceiveristurnedonforinspection,it shouldbestrippedsothatthereceiverchassisand panelassemblymaybeunderobservation.Thenin- spectthereceiverforthefollowingconditions: a.Checkther-fgainand the audiogaincontrolsfor noisyoperati
46、on;ifso,replacethem. b.Switchtheselectivityswitchfrompositiontopo- sitionand note ifthereceiverfaultissuchasto causearcingatanyoneoftheswitchcontacts.This isaveryremotepossibilitybutin anycaseeach switchcontactshouldbeinspectedforevidenceof charringofthebakeliteswitchwafers;ifany,replace theswitch.
47、c.Checkatalltubesocketsterminalsforpossible arcingandcharringbetweenterminals;ifany,re- placethetubesocketconcerned.Tolookatthetube socketson ther-fstrip,removether-fcoilassemb- lies,anduseasmalldentalmirror. d.Checktheconversionswitchcontactsforarcing andevidenceofcharringbetweencontacts;ifany, rep
48、lacetheswitch. 6-7.SWITCH, BASEANDSPRING ASSEMBLY. With thereceiverturnedoff,removethe20r-ftuner coilassembliesonfiveofthesixreceiverfrequency bands,doingthiswiththereceiverchassisandpanel assemblyturnedupsidedown.Engagethepincon- tactsof thefourr-ftunercoilassemblieskeptin the tuningunitassemblywit
49、htheVswitchcontactsas- sembledtotheisolantitebasescontainedin ther-f strip,usingthebandchangecontrolonthefrontpan- el.NotetoseethattheVswitchcontactsare spreadbythepincontactsandthatthepincontacts centerupintheVswitchcontacts;alsochecktosee thatnone oftheVswitchcontactsarebroken,or thatthepincontactsinanyoneofthe24r-ftuner coilassembliesareloose.ReplaceanybrokenV switchcontactsandtightenanyloosepincontacts,if any. 6-8.SUBASSEMBLY INSPECTION. 6-9.Forpurpos
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