Hammarlund_SP-600-JX_overhaul_instructions_AN16-45-223_1952.pdf
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, Calif;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 IIISPECIALIZEDMAINTENANCEANDREPAIR 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.ChassisDisassembly.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.TestingofSubassembliesand 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 XIINSPECTIONANDTESTING 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.SubassemblyInspection.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.SpecialToolstoReassembleRF2-4.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 Figure1-1.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.),manufacturedbythe HammarlundMfg.Co.NewYork1,N. Y.There- ceiver,designedfordirectmountinginastandard 19-inchrelayrack,isa20-tubegeneralpurpose radiocommunicationreceiverwith aself-contained stabilizedpowersupplysuitedtooperatefroma singlephase50-to60-cps,90to270volta-csource. Itprovidesforthecontinuouslyvariableorcrystal controlledfixedfrequencyreceptionof anyradiofre- quencycarrierinthe0.54to54.0mefrequency range.Therotaryturretwhichhousesthesixfre- quencybandsofthereceiver,inassociationwiththe gear-traindrive,providefortheexcellentmechani- calstabilityforwhichthereceiverisknown.Also, itsprecisemechanicalconstructionenablesfullad- vantagetobederivedfromthecrystalfilterincor- poratedinthei-famplifierofthereceiver.There- ceiverfunctionalcircuitryismostlycontainedinsub- assemblies,allof whichmaybesubjectedtoindivi- dualreplacementwhenevertheneedarisesforre- ceiverrepair.Thereceiverisdesignedforfixed and/ormobileoperationalactivitiessuchasareen- counteredatenclosedbaseorfieldstations,onship- board,orwhenairborne.Suchactivitiesmaybe subjecttowiderangesintemperatureandhumidity sincethereceiverisadequatelyconditionedfortropi- caluse.Thereceiverisfullyshieldedtokeepits radiationcharacteristicstoapossibleminimum. 1-4.Theradioreceiverissuitedtooperateinsingle ormulti-receivertwo-wayoperationalactivities.Any activityrequiresthatcertainauxiliarycomponentsbe associatedwiththereceiver.Apartfromthe phone jackcontainedinthefrontpanelof thereceiver,all thereceiverinter-connectingmeansarelocatedon therearapron.Therearapronalsocontainstwo fuseholders,oneforathreeamperecartridgetype fuseinserieswiththepowertransformerprimary winding,andtheotherforaduplicatespare.The powertransformersecondaryplatewindingisfused by athree-eighthsamperepigtailtypefusesoldered betweenthetransformerterminal11andchassis ground.Thefrontpanelofthereceivercontainsall thereceiveroperatingcontrols.Allthereceiverad- justmentcontrolsarelocatedontherearapron.The coiladjustabletuningcoresandtrimmercapacitors usedtoalignthereceiver,andtheadjustmentcon- trolsontherearapron,maintaintheiralignmentand adjustmentsettingsforlongperiodsoftime.Through theuseofvarioustypesofsprings,allthereceiver adjustablefixedand movingpartsareprovidedwith positivepositioningandoperation.Also,flatsprings areusedontherotaryturretassemblytoprovidefor electricalgrounding.Thereceiverr-fcoils,r-f chokes,andallsolderedconnectionsarefungicidal varnishedfortropicalization;also,allmetalpartsin contactconformtotheelectrochemicalseriesofele- mentssothatcorrosioniskepttoapossiblemini- mum.Inviewofthefactthatallpossibleprecau- Table2-1.SpecialToolsRequiredforOverhaul Figurealso,havingdisassembledtheoctalsocket, thebareelectricalwirecommontothesixcrystal socketsisunsolderedsubsequenttotheremovalof thecrystalsocketplatecarryingthecrystalsockets. Theaudiofilterassemblyisdisassembledsubsequent toitsdismantlingasaunit. AN16-45-223 SECTION V CLEANING SectionV Paragraphs5-1to5-12 5-1.OVERALL.5-8.PRESERVATIONAFTERCLEANING. 5-2.Theradioreceivermaybeblownoutwithcom- presseddryfilteredairatapressureofapproxi- mately100lb/sqin.Accessiblepartsmaybewiped with acleancloth.Not tooreadilyaccessibleparts maybedustedwithasmalldrybrush. 5-3.ELECTRICALPARTS. 5-4.Whentheradioreceiverisdismantledandits subassembliesaredisassembledallwiredelectrical partsmaybeblownout,wiped,anddustedasoutlined above(Refertoparagraph5-2.),fortheoverallre- ceiver.Theairpressureatthesubassemblyorpart maybedecreasedbyincreasingthedistancebetween theairnozzleandthework. WARNING Weargogglestoprotecteyesfromdust. 5-5.MECHANICALPARTS. 5-6.Allmechanicalpartssuchasthechassis,side plates,shields,screws,etc.,maybecleanedby brushingwithFederalSpec.VV-K-211bKeroseneor FederalSpec.O-C-141Carbon-Tetrachloride.To removecorrosionuseNo.000sandpaperaswell, thenwipewithacleancloth. 5-7.Dirtygearsarecleanedbestwithapipecleaner orsmallbrushdippedinanyoneofthecleaningfluids mentioned(Refertoparagraph5-6.).Thevariable airtrimmercapacitorsmaybecleanedbysoaking thembodilyinanyoneofthecleaningfluids(Referto paragraph5-6.),andthenblowingthemout.This appliestother-ftrimmercapacitorsevenwhenas- sembledtotheirisolantitebases,withr-fcoils,re- sistors,andallotherfixedcapacitorsremoved. 5-9.RFCOILSANDCHOKES.Ther-fcoilsand chokesusedintheradioreceiverarealltreatedby dippinginbakeliteresin,fungicidalvarnishapproved asperJANSpec.JAN-C-l73.Theapprovedthinner usedwiththisvarnishisasperFederalSpec.PTX- 916GradeB. 5-10.FOUR GANG VARIABLEAIR CONDENSER. Thefour-gangvariableaircondenserendbearings arelubricatedatthefactorywithAirForce-Navy AeronauticalSpec.AN-G-15aGrease.Itmaybelub- ricatedintheremoteinstancewhentheneedarises. 5-11.AIRTRIMMERCAPACITORS.Thevariable airtrimmercapacitorsarealllubricatedatthefacto- rywithAirForce-NavyAeronauticalSpec.AN-G-15a Grease. NOTE Donotlubricatethevariableairtrimmer capacitorseventhoughcleanedasoutlined above(Refertoparagraph5-7.). 5-12.GEAR TRAIN ASSEMBLY.Thereassemblyof theradioreceivergear-trainassembly,(Referto paragraph8-2.),subsequenttooverhaul,requires thattheMilitarySpec.MIL-G-3278Grease,usedat thefactoryforlubricationpurposes,bereplaced. TheMIL-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 Paragraphs6-1to6-6 AN16-45-223 SECTION VI INSPECTION 6-1.GENERAL. 6-2.Theradioreceiverisinspected,bycarefulob- servationandfeel,withregardtoanypossiblephysi- calindicationotherthannormal.Eventhoughthe receivermechanicaldefectappearstrivialitmustbe repairedatthefirstopportunitypresentedsothatit doesnottendtodevelopcumulativereceiverabnor- malitiesleadingtoseriousfailure.Assuch,inspec- tioniscloselyconcernedwithpreventivemaintenance wherebyperiodicreceiveroverhaulprovidesfor qualifiedinspectionpersonneltodeterminetheneed fortheimmediaterepairof thereceiver;or,tode- cidethatthenatureofthereceiverabnormalityisin- significantenough tobetakencareofatalaterover- hauldate. 6-3.INSPECTION TECHNIQUE.Toprovideforthe properinspectionofeachradioreceiver,theinspec- tormustthoroughlyfamiliarizehimselfwiththere- ceiverwithregardtoeachofthefollowingconsidera- tions. a.Determinefirstthenormalappearanceofthera- dioreceiverbycarefullynotingtheappearanceof eachsubassemblyandpartandtheirassembledinter- relationship(Refertoparagraphs4-1thru4-8and8- 1thru8-3.).Untilsuchtimethatthenormaldetail- edappearanceofthereceiveriscommittedtomem- orycomparethereceiverpartbypartwith areceiver knowntobeintheconditioninwhichitleftthefacto- ry.CarefUllyobservethecolorandfinishofall parts,theirrelativeplacement,thedressingofeach electricalwire,thequalityofthecrimpingofeach solderedwire,theamountofsolderusedtomakea solderedjoint,andthemannerandlocationofthose solderedjointsprovidingforelectricalground.Note thatallsolderedjoints,allr-fcoilassemblies,and allr-fchokesaretropicalizedasevidencedbytheir brownishfungicidalvarnishcoating.Notethatthe eightnutsatthe twoescutcheonsonthefrontpanel, the 12nutsatthesixcrystalsocketsonthefrequency controlunit,thebearingsetscrew(See18,figure 4-1.),andeachnutusedtomounteachpinoneachof the24r-ftunercoilassemblies,iscoatedwithU.S. ArmySpec.3-182ClearVarnish.Thevarnishis usedasanaidtosecureeachnutineachinstance sincenot toomuchstraincanbeusedtotighteneach assembly. b.Determinenextthemannerinwhichthereceiver operatingcontrolsactivatethemechanicalmeans usedtoperformeachcontrolfunction.Getthefeelof eachcontrolandcommitittomemory.Notethatthe tuningcontrolisflywheelbalancedandthatitisfree toturnevenwhenthetuninglockislocked.Notethat thetwoindicatorsforthemaindialandtheonein- dicatorforthevernierdialallsimultaneouslyindi- catezerodialindicationswhenthefourgangvariable aircondenserisfUllymeshed.Notethatthemovable maindialfrequencyindicatorpointerlocatesatthe 8 frequencyscaleon themaindialcorrespondingtothe frequencybandindentedandwhosefrequencyrang isthatshown onthedialvisiblethroughthesmall windowcontainedinthefrontpanel.Note themanner inwhichthefrequencycontrolunitcrystalswitch armandeccentricdriveassemblydrivesthe two switchescoupledtothedriveassembly,theorienta- tionof thedrivearmandtheeffectofthesmallheli- calspringused.Note thespring-returnactionof the meterswitch.Note theextenttowhichthegearson thegearassembly(See31,figure4-1.),meshwith thosetheyengageand theholeprovisionin thebear- ingplate(9)togetatone of thescrews(32).Note thatthelubricationusedonthegear-trainassembly isbarelyvisible.Note byfeelthetightnessof the adjustabletuningcoresandtrimmercapacitors,but makesurenottodisturbtheiradjustmentsettings. 6-4.RECEIVERABNORMALITIES.Inspectthere- ceiverwithregardtoeachofthefollowingpossible categoriesofabnormality: a.AGING.Theaging ofthereceiverisindicated bythesloppyornon-positiveoperationofmovable partswhosenormalfunctionduringmovementor whenindentediscontrolledthroughtheuseofsprings, cams,gears,ballbearings,orprecisebearingfits totruedmachinedshafting. b.BURNING.Theoverheatingofthereceiveris indicatedwhenpartscomprisingitshowdiscolora- tion,blistering,bulging,orsmellburnt. c.LEAKAGE.Theevidenceofoilorinsulating compoundattheterminalsofsealedcontainerparts providetheearliestpossibleevidenceofreceiver leakage.Theleakagemaybeevidenttooatpinholes and/orbreaksinthecontainerenclosedpartitself. d.CORROSION.Theevidenceofreceivercorro- sionistheoxidation(rust)whichformsonsurfaces, screws,nuts,etc.,usuallywheredifferentmetal areasareincontact. e.DUST,DIRT,ETC.Theneedforcleaningthe receiverisevaluatedbestbytheextenttowhichdust, dirt,etc.,hasaccumulatedatelectrontubesocket terminals,resistorboards,andothernottooeasily accessiblesolderedjointsandcornersinthere- ceiver. f.LOOSENESS.Theneedfortighteninganysubas- semblyorpartcomprisingthereceiverisevaluated byfeelingthesuspectedloosepartfortightness.In theinstanceofattachinghardwaresuchasnutsand/ orscrews,considertheassemblytightwhen nomore thana 90degreeturnmaybetakenupintheattaching part.Makesuretoresealthosenutslistedabove (Refertoparagraph6-3.),wheneveroccasionarises totightenanyoneofthem. 6-5.RECEIVERINSPECTION. 6-6.Apartfromthecarefulinspectionoftheradio receiverforphysicaldamageevidentbyobservation, AN16-45-223SectionVI Paragraphs6-7to6-12 thereceivercontrolsshouldallbetriedtorender assurancethattheyfunctionproperly.Dependenton theinspectionappraisalof thereceiveronreceiptfor overhaul,adecisionshouldbemadeastowhetheror notthereceivershouldbeturnedontodetermine theelectricalconditionofcertainofitsfunctioning parts,beforedismantlinganddisassembly.When- everthereceiveristurnedonforinspection,it shouldbestrippedsothatthereceiverchassisand panelassemblymaybeunderobservation.Thenin- spectthereceiverforthefollowingconditions: a.Checkther-fgainand the audiogaincontrolsfor noisyoperation;ifso,replacethem. b.Switchtheselectivityswitchfrompositiontopo- sitionand note ifthereceiverfaultissuchasto causearcingatanyoneoftheswitchcontacts.This isaveryremotepossibilitybutin anycaseeach switchcontactshouldbeinspectedforevidenceof charringofthebakeliteswitchwafers;ifany,replace theswitch. c.Checkatalltubesocketsterminalsforpossible arcingandcharringbetweenterminals;ifany,re- placethetubesocketconcerned.Tolookatthetube socketson ther-fstrip,removether-fcoilassemb- lies,anduseasmalldentalmirror. d.Checktheconversionswitchcontactsforarcing andevidenceofcharringbetweencontacts;ifany, replacetheswitch. 6-7.SWITCH, BASEANDSPRING ASSEMBLY. With thereceiverturnedoff,removethe20r-ftuner coilassembliesonfiveofthesixreceiverfrequency bands,doingthiswiththereceiverchassisandpanel assemblyturnedupsidedown.Engagethepincon- tactsof thefourr-ftunercoilassemblieskeptin the tuningunitassemblywiththeVswitchcontactsas- 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
