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, '8 T c L I K g N t / E p 1 R 2 S A W O D o M J P U . C L l F B R 5 E T 2 8 O 4 A o ( K N ) G M U A L I I I I g AFTER uNpAcKING Itjsadvisableto savealIoriginalpackingcartons(innerand outer) to protect your valuable Linear Am plifier from damage should you wish to transportitforremote opera- CA UTlO N Read Operating ManualSection 2 before proceeding to unpackand assem bleyouram pIifier. w A RN ING tion orship it for after-sales service. The foIlowing explicit definitions apply in this m anual.Be LETHA L VOlTAGES PRESENT. s uretor eadthes edefi ni ti ons. NOTE = 1 , , , ! , ! , , l If disregarded, inconvenience onl y - no t daMage orperSOnalinjUry. j CAUTlON = equipm ent damage m ay occur, but not personalinjury. WARNING m personal injury may occur - do not dis- l regard. 3t I q 3 4 y CoNTENTS rL.g22A spEclFlcATIoNs ...................3 Ecrlo N 1 FEAruREs ...................4 sEcr o N 2 pREpA RArloN fOR USf .........5 2.1 Accessor;es 2,2 lnstallation of Power Tubes 2.3 ceneralTips on lnstallation 2.q AC pow er Source 2.5 Line Voltage Change 2.6 pow er Cable 2.7 Excìter 2.8 Antenna 2.9 Interconnection 2.g.1 cround;ng 2.9.2 Cable Connection sEcrloN 3 CoNrRo Ls AND THElR FUNCTlONS .9 3.1 Front panel 3.2 Rear Panel sEcTIoN 4 opERArlo N ........,......... 11 q.1 prechecks q.2 CW Operation q.3 SSB operat;on q,q RTTY Operation -q.5 Sett;ng the A LC ADJ ControI q.6 Ad;usting the Rf OutputMeter q.7 H igh-Voltage Transform er Protection .8 Carrying Your TL-922A sEcrloN 5 c Rculr 0 EsCR prlo N ...........13 5.1 Linear pow er Am plifjer 5.2 Power Supply 5.3 Fan M otor DeIay Stop Circuit 5.Q Meter Drive Circuit 5.5 Spark Suppressor 2 SECTlON 6 MA INTENA NCE .........,...... 15 6.1 InternalCleaning 6.2 Replacing Pow er Fuses 6.3 Replacing Pow er Tubes 6,4 lnpUt MatChin9 CirCUit SECTlON 7 TROU BlESHOOTIN G HlNTS .,,... 16 PA CKIN G ................................ 17 lNTERNA L PA RT LOCATlO NS ..,.,,.,.,.,,,, 18 SCH EM ATIC D IA GRAM ..................., 19 IlLU ST RATIO N S Fig. 2- 1 UpperCase CoverAssembl y/ Disassembl y ,.................... Fig.2-2 Correct Pow er Tube Handling ........ Fig.2-3 Parasìtic Suppressor CoilM ounting .... Fig.2-4 lnput Voltage Term inal Boards ....... fig.2-5 Power Cable Color Code ............ Fig.2-6 Exciter Connections for R L and A LC 5 5 6 7 8 Controls ........................ 8 Fig.2-7 Interconnection of the TL-922A ...... 8 Fig.3-1 Front View ...................... 9 Fig.3-2 Rear View ...................... 1O Fig.5-1 Linear PowerAmplifierCircui t ....... 13 Fig.5-2 Transformer PriMarY Current Flow ..... 14 Fi9.5m3 Fan M OtOr DelaY StOp CirCUi t ........ 14 Fig.5-4 M eter Drive Circuit ................ 14 Fi9.7-1 PaCkín9 fOr Shipment .............. 17 Fi9. 7-2,3TOp,BOttOm View S ...,,.,......... 18 rA BLEs 1. frOnt Panel COntrOIS Set-Up .............. 11 2 TUne and LOad Ini tialSe in9S 11 r ' , JlJJJI lJJJI JJJlI.JIJlI llllI-JJllI llIlI.lllJIlJJJJI.IllJI llJJIIllllI lIJlI.IlJlJI"JJlJI.IJJJJI.lJJlJI.IJJJJI"IJJJJI"JJJJI-JJJJIIJlJJI- JJJJI.IJJlJIIllJJIIJJJJI-IJJJJI-IJlJJI"IJlJJIJllJJI"JJJJI-JJJJI- I"IJJJJI JJJlI-llJlI ' - , _ _ _ __ lJllI llJJI.llJJI.JJllI llllI JlIlI llll I.lJllI.IJJllI-IJJJJI_" TL-922A S pEC IFICA TIO S IlIlI IlllI IlllI llllIIlJllI"IlJJJI- m -JJJJI-m JI.JJJJI.IlJJJI.lJJJI.IJJII JlllI lJJl- I- I- -It = , __ _ __ IlJJJI lJJlI- I lllII IllJI-IJlJJI"IlJlII lllJI- JlI"IlllJI lJlII lIllI-tllJJIIlJJJIi Transm it Frequency Range" . 160 m through 15m A m ateur Bands Excitation Energy Required" . Mode and Duty Cycle. 80 W nom inal, 120 W m axim um SSB,continuous for 30 m inutes. CW and RTTY ,key own continuousfor 1O m inutes. Rated Plate lnput. 2 kW P.E.P.SSB,1 kW CW RTTY Plate Voltage" .(athlo signal) 3.1 kV SSB,2.2 kV CW RTTY Circuit Type: CIass A B2 grounded grid linear am plifier 3rd Order Jnterm oduIation D istortion; lnput lm pedance" . Below -30dB. 50 n ,unbalanced at better than 1.5 SW R Output lm pedance. 50 to 75 n ,unbalanced. Cooling" . lnterlock Satety Features; Therm alProtector; Forced A ir. Prim ary high voltage circuit cut-off. Secondary high-voltage circuit grounding. Locks out transm it relays if H .V.pow er transform er overheats. fan MotorDelay Stop Tim e; 140 + - 30 seconds. (atroom temperature) A LC; Negative going,adjustablethreshoId -8V C maxim um output (typical). power Tubes U sed. Q m iconductors: Eim ac 3-500Z ,tw o pieces iodes, 18 pieces ' _ lener diode, 1 piece powerRequ;rem ents. Cablegsuppl;ed. 120V,28A ;240V,1qA ;50/60H ;form axim um SSB input. Si gnalcable (coaxial)with U H F-type connector,1.5m. Controlcable, 1.5m . Dimensions; Weight. 390m m x 19O mm X 407m m (15-3/8 X 7-1/2X 16') Net3tkg (68 Ibs.) Shipping 38 kg (83 Ibs.) The above specifi cations are subjectto change w i thoutnotice dueto technicalim provem ent. f = - lIllllllIll.llllll.llllIlillIlllIlIll.llllll.llIlllllIlIl.llIlll.lIllIl.llllIllllIllllllIl.lIllll.llllIIllIllllIlllIlHHllllIll.llllllIlIlJl.lIlllI.lHllllHHIIJllIIlIlIlIlHHIlIlllIlIlllIIIlIllllllllllllIllmIllllHllllllllIlIllllIllllllIllllllIl_ s EC T IO N 1. FEA T U R ES . . _ _ __ , = -, - _ _ _ _ íilJllt,llJlll.lJJlllllllJlllJIllllllll.l llllIllIm Jl.l ll.I -IlIlIliHIJl.lIJJJllIlIll-l l-l -l IlllIlIIIlIlI llllllllllll.lIlllllIlIll.llllIl.llIlll.lllIlllIlIJIlIllllllIlIlllllllllllllillIlllllIll-I lllIllllHHIllllll-llIJJl.llIlll_i 1. The T L-922A is a Class AB2, grounded grid linear am plifier developed by Trio-Kenwood through advanced high-power technology using tw o high-performance Eim ac 3-500l power tubes. lt covers all bands 160 m through 15 m for SSB,CW and R TTY linearity,and the CW Mode for low powerconsum ption and heat generation during extended periods of operation. 8. m odes of operation. 2. 3. This switch iscapable of setting yourT L-922A in the straight-through state irrespective of the standby control on the exciter. Unprecedented Reliabjli The T L-922A isdesigned to provide stable,high RF oUtputpowerrorextended per;odsorcont;nuoususe. Eng;neered w;th Tr;o_Kenwood,sadvanced c;rcu;tand caItechnoIogy, the T L_922A empIoys two m echan; d 3_ 5ooz powertubesto the;rruIIadvantage. rugge linearAmpIification ControlSw itch 9. ' , , : ' ' ' ! ! , VariabIe Threshold Level (A LC Detector) , The A LC circuit wiIlaccomm odate exciterS of 80 w , to 120 w (nom inal)by varying the A LC threShold Ievel. This effectively prevents overdriving the final powertubes, ;m ;t;ng the Am pI;f:erto :ts l:near range and gUaranteein9 lOW diStOrtiOn atM aXim UM POWef low ntermod,lat;on D ;stort;on , ' ' . i , Intermodulation distortion (lM D) is m inim ied through the useofnegative R.f.feedback. q. 1O. Two PanelM etert ln adjusting ormonitoring yourTL-922A,one meter aIwaysindicatesthe (lp)platecurrent;while,with'the other,you may read (Ig)grid current,(RF)relative output,or(HV)high vol tage. Thisfacili tatesease of Qu;c Turn.on W arm-up isnot necessary.The 3.500Z tubesarefast heatjng. operation of your TL-922A. 5. 6. FullSafety System To protectyou against any possible high voltage electr;c shock,yourT L-922A has a double safety system 11. Rigid MechanicalStructure Thedie-cast side panelseffectiveIy supportthe weight comprised of interlocking switches. One interrupts of the am plifier against shocks and jarring during the high voI tage primary circuit w hile the second directly grounds the secondary high voltage circuit. Also provi ded are bleederresistorsfordischarging the high voltage capacitors and ''DA NG ER''warnings at high voltage positions. Please observe all warnings, they are for your protection. transportation. Recessed side panelhandles are provided so the Am pIi fiercan be easil y carried. is rem oved from the un;t and w iII measurably extended tube life. . 7. Mode Switch forEffic;ent LinearOperation M O D f switching js provided to select between the SSB Mode for the maxim um PEP outputw ith good 1 ! ! , , ! ' ,' I , ! i i , t . , , , ' , 12. Vernier Plate Tuning 0ial The PLAT E tune dial is equipped with a reduction gear that facilitates easy tuning, particularly for the : , . ' , higher bands. lt also effectively preventsaccidental ' í m iss-tuning during operation. Controls and panel arrangement, designed to hum an engineering standards, provide superior ease of operation. ' , . hlewly-0eveIoped fan Motor0elay Stop Circuit To reduce power tube deterioration, yourT L-922A has a newly-developed fan m otor delay-stop circuit com prised of a thermaldelay relay.The cooling fan wiIInormally run for1QO seconds (Typ)afterpower i , , , ! 7 13. eat,Contem porary Appearance M echanjcalarrangementand sophisticated design tO m atch any Trio-Kenw ood tranSCeiver OrtranSm itter. Your TL-922A can aIso be used as a high-quality, general purpose Amateur band Iinear am pIifier W ith any exciter capable of 80W to 12OW Rf OUtpUt, ) ( j , ; , ' i . , 4 ' ? _ , 2 . t r e c f k 3 4 U ' A l . , y C h J X a ( i T n F t O q o s U S ' f 2 r . , 9 p 0 1 4 a C c l O s t _ ' k i 5 S f o R 2 . n u b e y , I X p M 1 r 0 4 ' U W T a i s 3 / ) . o _ d 5 8 g 7 , m 1 P 2 ' I L w i O S n s H 9 . t E h o l $ u 1 " , 3 C A g 2 ; e U O 5 ' s T H ) L 8 f . 7 i o ? I 1 n , t 9 e 2 Y ! a p 3 H s r N ' w . 4 A , n m g o ! p ' a I c . l , i e t 1 s C p ' o R O ! r . D n , c e y E d s ' p ! . A , R ' ! 4 6 5 . c p L N T A E , s r ' I o a 0 C h n R ! l c F e N d . k t m T , G u f v i o ' p E P n s h D I R e g F y L ! . r t , l b u i a d ' R s n e P ! h H t , c x . r o y 1 l p M u ^ ' A e i v S , R J t f a h . Y E o ! n L l u P d s e ' A i , " r t O h f . c x T E a m s ' e C b , ( H i y R l v ! . t O \ u ' N h f e o s r , g . i c D n l a ' ! E t F p e , . A 4 s c u 1 n ' m o v R 2 E l ) w . k p , ' e s I n t _ 5. spareruse,15AFo5-1533-o5 2p;eces 6. Extensjon footJ02-OOQ9.14 . 2 pieces 7. Scr$ws,4 x 12m m long N30-QO12-46 8. Platg cap F02-0407-04 g. paras;t;csuppr$ssor ;I,,;ghih,nd L3g-o4o1-o5 1O. Parasiticsuppressorcoil,lefthand 2 pieces 2 pieces 1 p;ece 1 piece l . q P!eces ' eces Q pi v, .b,ai, .o, ,,d h , d . . e a r a S P t0lY frO procedu res below. Prepare pl't' CaP par,s;t;, suppresso,co;' ,;ghth,,d ,,d Iefih,,d re^,3 x 6 mm long Ptain washer Spring ^asher Tools . - Ph S illilpstss crewd v eewdr r iver mal andar dr si cr -' ' 1 ? P ! , x\x\ . 2 P,eces ) Sw,TcH PLUNGER 4 pieces 4 pieces Q pieces !, NOTE. A parts tray to prevent loss of m etri c hardware is i hetprul. WARNlNr G h . g p B o e w t o 0 r e c $ p b r o l 0 c e ; e s d N i n o g T , m p a l u k g e g s 0 u d r e ; n t h t a h t 0 . w 8 l l o u t l$t.Th0METERswitchis$tth0HVposition 8nd th0 m ultím $t$r r0$ds OV. Proceed as follow s. (Referto Fig.2-1) 2. Remove the four 4 m m Phillips scre^s holding the upper case cover. Removethe uppercasecover. . .P' SCr'^S R'MOV' !h' tOUr 3 ? M S'l!-"PP'n9 ph. 'iI! and fOU, fl,t head Self-t,ppin9 PhillipSSCrew ShOldin9 the insideshield on the powertube enclosure. , '' -; , ,, /,, \? ,, ' ! ,','.! ! ! ' ' , ' 1 ! ' ' - / i /// / // / //- i/ / Figur02-1 UPP0r C8s0 Cov0r Assgmbly/Disgss0mbly. 1 p;ece e,,h 1 ie ce lp pi ece .. ,,,. ' /' E ) m ._ ! t \ , /, ! n ^? ''' 'tTT''/! pí "' -/ / i !/1// /?<?XXm ? ' USE #2 Phillips Scr$w driv$r. \ \ h ? , 1. \ ii' UPPER C A S co v E R ,NSERT SH lELO ! ' ,' 2 p;eces , , !i \ \"\? the following mounting hardware and iools. Mou,t,,g H,,dw,,e powe,tube,3.5ooz ! . 1 ìl O ie,U mni 0 ,, . . et , ''nS , h'' 'k fP OO 'i nSt e tY iOnW ,' fr O' llOP Wa t' hd ' , 0 b '' \ - g l - ' -', t l I J NsTA LLAT oN o F pow ER TuBEs 2'2 p,I oig,t thg power iubes ,, your TL g22A ag,,,si , ,scREws \ ' 'ì' sw,TcH I PLUN,ER j qp; e,es ? 3m m SE LFA pp,N , ^\\.\'\ 3,m F ,A, H EA sELF-TApp N, \ ' scREw (4 pcs) ' H,,H ,o Ll TA,, sEcoNoARy ' pROTECTlON L3g-o4o2-o5 11' SC!0w ' 3 X 6M ? I0?9 N3o- 3oo6- q6 12. Plain w asherN 15- 1030-46 q6 13' spr,,gwashe,N16. 3o- io ,,S i ITCHPLUNGER '' I' 1.i, , i. ,, , , \) ! i ' ! 1 i ' , i 1 i I ! , ', i ! ' , , ?? h ' ' --_ '. ' _ - Figur0 2-2 - 0 rre Po ru Handl;n CAUTIO N Tubelnstallation Checkout part;cular care should be taken not to strike and break the glass tubes during installation.Tube break- . 1. age due to negligence isnot w arrant a. Fi TeMp Oraril y;tht fiXhe, eaCett h par it iCSUp(Referrtoco; ,g. on2t3) he pi ate capw er,aS ,R, ,or, ,L,, b adjusted. mount ,,e p,a,e cap w;th paras;t;csuppressorcoiton ach ,ube observ;ng the r;ght hand and ,erthand co:, e 2 d Power tubes are free frOM SCratCheS or Othef physicaldefects iUb''ar' rUI,Y . ' .r'O'k''' '?S'r''d. 'n'O ','' C Plate CaP SCreW St' l9htened SeCUfeIYt d Scre,s at both endsof the parasitic suppressor ' .,Sare ,' .9htened SeCUreIY' CO, w . ' "','r','Cr'w',df'V'r' 'n 'nY O'h'rU'n''''S'rY Ma''f'''iS nO'''!' i?Sid''h' U?i' Referto Fig 2-1 The inside shi eld pl ate includesthe preSSOup Att,,st,, e do nott,g,te,,,e q , , s,rew . aC,,g ' ' , ., b and Sprin9 W aSher,bUt SnU9 theM SO t e COl M aY e 8. To avoid daM age neCeSSitating tUbe reptaCeMent, pleaSe CheCk; i ! , t p h e r e s i c g C i n s o e a i t I i n o b s n y t s a ' S la l i f 9 t h i th o ne be , k s ' c e d ri e p w n i 9 ng h O o r t I h eS Xt d C e o ni d l n i D b Oe 9 tI O b a W y l i 9h n t h a , e n S d h t e a f V p O er l 's he b i a g c k h er u l v i e t o e l y l t b an e g r e ' g ) a P s g e oc s ' o i t h n i o e dn a s r t p y h r e i pg n p r o l a t p e t l e ct a s e i on f t o hr s at w un t i h g c e r h o p u p I u n l u ng d n i n gr e ew r th ( i a e , l , of the pIate cap. cAuTloN. . pait;cular care shouId beexerc:sed Jn not apply;ngexcess;veforceto thetubes. , h. P '!' !9h VOl'a9' ! '! 'ia! n9'9' i,! . ni';' .'d'PPr;Xi M,a ,";.,M~,n'O'. 'rO?'P'Ç',. ' P l?S",, 'h' UPP'r C'S' C0V'' W.., . , d. , . , 1 , ( COV eF aS e '9 VO age PrIM aFY PrO eC 'Ve, 'S . . t. ., , , f p OS ' ! O " ,,' 'OV "'O ,,' P,Un9'rW ' SW !" P Un9'. . , , , , en9a9e e M ICrOSW 'C ' 3 g. c are ruhol , i ydii; ghi npl,h c sah,and. eachendortheco: , whi le ng te he ae tes cr ae pw by 1o. T;gh,en ihe p,ate cap scre, us;ng ihe smat,standard screwdriver. : : ! , , 11, CheCk to assure correct installation by reference to F: g.3-3. OTE ; l?Stallat' lO?,CheCk eaCh PafaS'lt' IC SUPPfeSSOr CO' ll fOr 1; BefOre ' good alignment to prevent the application of excessive force to thetubes. 2 ; Let ter s' 'r R;I ' 'a; n ''L on co iIst sh ho fa cecap up. 3. Te mp or a y ndstaI I'' ea chthe co;I on e;u rId pIa te sbefore t;naI ti ghtening. Use # Philips screwdriver. 1 Ips o N JNsTA LLA T Jo N 2- Install in a dry, well-ventilated area, shaded from direct Sun light. Your TL-922A m ust h8v$ 8 m inim um clearanc$ oF 15 cm to th$ r$8rto 8IIow hot 8ir8t 50 to 70^C to exh$ust. Choose an operating position capable of safely supporting , , ,,e ,e. ,ght or the TL.g22A (31 kg),pIus a,,,he o,he, station eaUipm ent. . LeVelyOUrTL 922A . In Operatl On. T,e heated e,eCtrOdeSin each power tube willbe distorted by gravity resulting in shortened service li fe,ifslanted beyond 100. i , . t N3 c E N R A L T a spR INc w AsH ER F,AT wAsHER , Ii I1l! , , ! i , ' I 'II lll 2.q Ac pOW E R SOU RC E ! \ -h' , ? / ' ' ' i , 0 0 )r' !-'-- X' s x ?? m ' ? '' ' g ? LINE v oLTAc E cHA NGE .5 W A RNlNG . x\ '''? m h ? I v oltageforwhi chyourAmpl i fierhasbeenset. 2 ' ' / ?? -_ . _. lE D ISCO N ECT T H E AC IN PU T PO W ER C A B FRo M r H E T L g22A BEFo R E pRo c EED ,N G - ' The inpUtVoltageCan beChan9edtOei ther240V Or120V aS o e dd inb t du ct on ear pa r , ecaqut; re , yhech an g;n gtth,eerp owe rnel tra.nsrormer: nput, : nks N OTE; The TL.922A w as factory setin the 240V position. figur$ 2-3 - P$r8sitic Suppr$ssor CoilM ountin9 6 ' ' l, arrec,ed by ;nadequate I;ne regu,at;on. In ,he wors,Case, '' i i J , , USe an AC PoWer line haVi?9 SUffiCient CUfrent CaPaCitY or the perform ance of your TL-922A will be adversely do no, devía,e ,ore than + _ 1OO /o froM the rated input \\ ' ' ! . . I 3 , ' ; . , , ! ! , ' ! , . , ' , . , ! , , , ? ' ! 3 , t s a O h C 2 T b f S w i l o p r . A m 6 e , U I u y E D t n P a O s i w ; 9 W c A g b k o F ' e l d r h , V u f . E s i S n t a R c ; w P x p 9 o l C r e ' f , F A u S d m v g U s n i t P O l I e o r M a 9 E , C 2 d s . b p V _ h g R 5 i S u w e l n c t A a m o y Y I U p . s b v , ( g h 9 w e r 0 n l ; i t d u f a o k c T . s ) e h L n ; w D t _ ú g l F o r 2 a i 9 f s . e m A t n , o b r h w I 4 c a v x l i d s S T e n g t f o 9 r h w y , P p v . u I i l n e t d gT S t 2 y ( i h m 1 r e . o g ) p u 8 K d 3 E s L a A D T R 9 0 n e 2 , N w c t X O _ i g / r o h d S s a x l . E f n 1 5 8 A t ' 3 M 9 b 2 N W 0 i p r , e C R Y s k a T o q S v g n l ; d p u 1 w i e t c 5 . s E 2 3 o 0 v a W ; , n f R r i t d l 1 T s p . C b u S U o g e c , 5 a w d ; 2 I r q T i x n 0 p s 9 t v m h e . C o G A , a l R S r 2 n i E ; q u t 4 c 9 L h d g e / 3 ( N I W 1 . y 0 a , o r w 5 v R S T t n x + i ; ) Y l L s 1 D O m a c N 4 U o , r E 9 v 7 2 t 0 T e n 5 b S L l s h _ f e 2.1 Ex c IT ER An HF AmateUrband SSB OrCW tranSm itterOrtranSCeiVer having an RF outputim pedance of5O© and outputpowerof 80W to 120W is sutficient to drive the TL-922A. Exci ter output exceeding 120W w illcause overdrive, resulting in sho ened pow ertube lite and distorted output. To lim itthe pow er l evelabove 120W ,use an exciterhaving an external ALc ;nput term ;naI. and antenna. To protect your TL-922A against adverse SW R effects,use an antenna tuner. Note that feeder radiation due to m ism atching willcause TV l, BCI, orsj, ;lar RfI. BLACK W HlTE '' ,l, ., i. '.' i .' ? .í,i j í ! ,' .. i . i .a S ' P e t g F C U i h O ! u d l " r ' n t 9 2 b e 4 m , i g o s S C a I ' A ! n 3 u q t p T O d N Q 5 V . o ' l t u B L 8 6 E s g e S U # ? T 7 R p $ N h r i ; m I D o 8 O s n ' T g c a b l R G . E e 2 B 1 H w 4 0 o d 8 s V v r ; N A t . L i n gT C R O I , A N f L U s E M c F x i ; C t g T 0 , r R o 2 n ; ! . i 5 A L F C g o u p n G O r I R N w f E T 2 6 c L g b i ! , a A l C T o L I O g , 2 0 c A m d r o l I . r 2.g INTE RcoNN EcT IoN 2.g.1 G Ro u IN G conneci ihe G N0 posts of the T L-922A and exciter to prevent posSibIe eleCtriC ShOCk and RFl. The Wire USed ShOUld be aS thi Ck and shortaspossible and run to a good earth 9roUnd. 2.9.2 CAB LE CONN ECTlON Interconnect your TL-922A and exciter w i th the suppli ed cables as illustrated i n Figure 2-7. NorE. Ir you use an exc:ter ot another brand, replace the supplied conneCtOr With One appropriate to yourexciter.The e citer used m ustaccept the negative-going A LC voltage from the TL-922A. (The ALC output at no signal inDut is normally positive when not connected to theexciter.) ' The R L, orst,ndby control,;n the exc;termustbe sw;tched to g,ou,d ;, t,ansm ;tm ode, as;II,strated ;n F;gure 2_ 6. . . , NorE, . us e Rc_g/u, Rc.11/u or heav;er as ,,te,,, c,bIe ' N OTE ; If an SW R m eter is COnneCted betWeen ihe iL.g22A a,d ihe exc; ier,iotaIcoax;alcab e engih mustnotexceed 1.7 m. ! ' , . i ! t j t ' , I I I ! i I , ' ! , , , ' ! 8 ' t i ' . , J , J . , J . t , J s , . J E , c J . T , l o J . J , 3 . t , I J T c J q , 1 . o , J T . J R , 1 o J L , 2 1 s t J . l 5 A , I J l D t 1 3 J , . l T I H l , . E I 6 ? l t R J , l I F t u J l I , c l J T , I l O l , h ' I S t l J , ' l J I l , ' J l , ' l J ! _ 7 8 T TT g 1O 11 Figurg 3-1 Front P8n$IVi$w 3.1 fRON T PAN EL 1. IP M eter 9. M ETER Switch The lp meter readstheplatecurrentflowingthrough the power tubes. SelectsIg (grid current).RF(relativepoweroutput),or HV (plate voltage). 3. O A lR lndicator The O N A lR indicator lights up in the on-the-air, or transm it M O DE. PLATE Tuning Control This controlperm its you to tune the plate cirCUitto the deSired tranSM it fre nm ,and iSeaUipped w ith a redUction gearforeaSy tUnin9. 1O. BAhl0 Selector Set for the A m ateur band in w hich operation is desired. 11. LIhlEA R Switch ln the STBY position, the exciter runs straight through. ln the O pERAT E position, the A m plifier autoM atically kevsw ith theexciter. 4. M ultimeter 2. The M ultimeter can read the lg (grid current), RF (relative power output), or HV (plate voltage) as . 5. selected bv the M ETER switch. STBY lndicator W ith the unit turned on,shows unkeyed or receive state. 6. lOA0 Control lm pedancem atchesthe pinetwork to the antenna. 7. POW E R Switch A double pole sw itch com pletely disconnectsthe AC inputtrom the transform ers. MO 0 E Switch t for SSB or CW . For RTTY operation, set the sw itch to the CW position. 8. 9 t 1 2 3 4 ' '' ' ' ' ' ' ' ' ' ' ' ' ' ' I t J o s m x n T u q f II I n $ t t '' T i '.r ''' T '' ^ d T , g ! ' g p' . T', .r ', , . '' , 5 6 7 1o 8 9 11 , ! ' I 12 Figur$ 3-2 R$8r P8n$lVi$w l ' 3.2 R EA R PAN EL . , 1. 2. 3. 4. 5. Cooling fan The Cooling Fan coolsthe poWertubesand effectively keeps the insíde tem perature from increasing. Be 8. carefulofhotair(500to 700C}attheexhaustPort. g. Line Voltage Change Term inals These term inals are tocated behind the rear cover, WhiCh iS reMOVed bY PUllin9 the tWO SnaP faStenefS. FOfinPUtVOlta9e Chan9e,PleaSe refertO SeCtiOn 2.5 SerialN o.Plate ThiS Plate iS StaM Ped W ith the SefialNUM berOfYOUr T L-922A, RF M ETER Control This controlis used to calibrate the R f outDut reading.Forcatibration,seeSection 4.6. A LC A DJ COntrOl This controlis used to adjust the ALC voltage.for adjustm ent,seeSection4.5. 6. A LC O UT Jack Thisjack feedstheA LC voltageout. 1o. 11. RF lN PUT Connector This U H f-type connector inputs the R F signalfed from the exciter. U se the supplied ,abIe. ' RF o urpuT Co,,e,tor This U H f-type connector feeds the R F output to the antenna. , . cN post use th;s post to ground the T L_g22A to yourexc;ter and station ground. , . , FusE HoIde,s(2} ; ' E,,h co,t,;ns a 15 A ruse. Ire;the,o,both r,sesa,e blow n,determ ine the cause before repJacement. 12 po w ER c abIe ' Ac pow er, .s suppl, .ed to the ampI, .F, .erby, three_w . ,re cabIe. (See section 2.6) ' , ' , ' ' ! , ! , . , , ' ! ' . . ' , ' . , " ' , , , ' , , , ' . ' , ' 7. R L CONT Jack , ' ' This jack inputs the transm it-receive relay switching ' , , ground from the exciter. ' c , . . i , , , . ' l ' ' C , . . 1O , , ' , , , '. j ' ,