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� � T A Lt N EALR AM P.gLl Fl ER�,,,,,,, �� INSTRUCTlON MANUAL' KENWOOD COR PORATlON 8cg/p1R2I N1 T1 E1Do gI NgJA1 pAN B5o-258 -4o(K2)(G)

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AFTER uNpAcKING CAUTlON

It js advisable to save al I original packing cartons (inner and Read Operating Manual Section 2 before proceeding toouter) to protect your valuable Linear Amplifier from unpack and assemble your ampIifier.

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damage should you wish to transport it for remote opera- wARN ING !!,

tion or ship it for after-sales service. !,,The foIlowing explicit definitions apply in this m anual. Be LETHA L VOlTAGES PRESENT.

�l,sure to read these definitions .NOTE = If disregarded, inconvenience only - no

daMage or perSOnal injU ry. jCAUTlON = equipment damage may occur, but not

personal injury. WARNING m personal injury may occur - do not dis-

regard.

CoNTENTSrL.g22A spEcl FlcATIoNs................... 3 SECTlON 6 MAINTENANCE......... ,...... 15 EcrloN 1 FEAruREs ................... 4 6.1 Internal CleaningsEcr oN 2 pREpARArl oN fOR USf ......... 5 6.2 Replacing Power Fuses2.1 Accessor;es 6.3 Replacing Power Tubes2,2 l nstal lation of Power Tubes 6,4 l npUt MatChin9 CirCU it2.3 ceneral Tips on l nstal lation SECTl ON 7 TROU BlESHOOTIN G Hl NTS . , ,... 1 62.q AC power Source PACKING ................................ 1 72.5 Line Voltage Change l NTERNAL PART LOCATlONS .. ,., ,. ,. ,. , , , , 1 82.6 power Cable SCH EMATIC DIAGRAM ................... , 1 9

2.7 Excìter2.8 Antenna2.9 Interconnection

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Ser Case Cover Assembly/

2.9.2 Cable Connection Disassembly ,.................... 5sEcrloN 3 CoNrRo Ls AND THEl R FUNCTlONS . 9 Fig. 2-2 Correct Power Tube Handling ........ 53. 1 Front panel Fig. 2-3 Parasìtic Suppressor Coil Mounting .... 63.2 Rear Panel Fig. 2-4 lnput Voltage Terminal Boards ....... 7

sEcTIoN 4 opERArloN ........ ,......... 1 1 fig. 2-5 Power Cable Color Code ............ 8 'q. 1 prechecks Fig. 2-6 Exciter Connections for R L and ALCq.2 CW Operation Controls ........................ 8 q.3 SSB operat;on Fig. 2-7 Interconnection of the TL-922A ...... 8q,q RTTY Operation Fig. 3- 1 Front View ...................... 9-q.5 Sett;ng the ALC ADJ ControI Fig. 3-2 Rear View ...................... 1 O

q.6 Ad;usting the R f Output Meter Fig. 5- 1 Linear Power Amplifier Circuit ....... 1 3q.7 H igh-Voltage Transform er Protection Fig. 5-2 Transformer PriMarY Current Flow ..... 1 4� .8 Carrying Your TL-922A Fi9. 5m3 Fan MOtOr DelaY StOp CirCUit ........ 1 4

sEcrloN 5 c Rculr 0EsCR prloN ........... 13 Fig. 5-4 Meter Drive Circuit................ 1 45. 1 Linear power Ampl ifjer Fi9. 7- 1 PaCkí n9 fOr Shipment .............. 1 7

5.2 Power Supply rA

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Es7-2,3 TOp, BOttOm ViewS... , ,. ,......... 1 8

5.3 Fan Motor DeIay Stop Circuit5.Q Meter Drive Circuit 1. frOnt Panel COntrOIS Set-Up .............. 1

1 115

.5 Spark Suppressor 2 TUne and LOad Initial Se in9S

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J l J J J I l J J J I J J J l I . J I J l I l l l l I - J J l l I l l I l I . l l l J I l J J J J I . I l l J I l l J J I I l l l l I l I J l I . I l J l J I " J J l J I . I J J J J I . l J J l J I . I J J J J I " I J J J J I " J J J J I - J J J J I I J l J J I - J J J J I . I J J l J I I l l J J I I J J J J I - I J J J J I - I J l J J I " I J l J J I J l l J J I " J J J J I - J J J J I - I " I J J J J I J J J l I - l l J l I I . l J l l I . I J J l l I - I J J J J I_"--

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, TL-922A S pEC I F I CATI O S =--____

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Transm it F requency Range ". 1 60 m th rough 1 5m A m ateu r Ba nds

Excitation E nergy Requi red ". 80 W nom i na l , 1 20 W ma xi mu m

Mode and Duty Cycle . SS B , co nt i n uous for 30 m i nutes. _

CW and R TTY , key own co nti nuou s for 1 O m i n utes.

Rated Plate l nput .. 2 kW P. E .P. SS B, 1 kW CW R TTY

Plate Vol tage ". (at hlo signal) 3. 1 kV SS B , 2 .2 k V CW R TTYCi rcu it Type : C Iass A B2 grou nd ed gr id l i near a m p l i f i er

, 3rd Order J nterm od u I ati on D isto rtion ; Be l ow -30d B.l nput l mpedance ". 50 n, u nba l a nced at better tha n 1 .5 SW R

Output l m pedance .. 50 to 7 5 n , u nba la nced.

Cool i ng ". Forced A i r.

l nte rl ock Satety F eatu res ; Pr i m a ry h i g h vo l ta ge c i rc u i t c ut -off.Second ary h igh -vo l tage ci rcu it gro u nd i ng.

T h e r m a l P r otector ; Lo c ks o u t t ra n s m i t re l a ys i f H .V. p o w e r t r a n s fo r m e r o v e r h e at s.

fan Moto r De lay Stop T i m e ; 1 40 +- 30 seco nd s. ( at roo m te m p e ratu re)

A LC ; N egat i ve go i ng , adj ustab l e th resho Id -8V C ma x i m u m output (ty pica l).power Tu bes U sed . E i m ac 3-500Z , two p iecesQ m iconductors : ' i od es, 1 8 pieces

lener d i ode , 1 pi ece

power R equ ; rements .. 1 20V , 28A ; 240 V, 1 qA ; 50/60 H ; fo r m a x i m u m SS B i n put.

Cableg suppl;ed .. Signal cable (coa xial) with U H F-type connector, 1 .5m.Co nt ro l cab l e, 1. 5m .

D i mensi ons ; 3 90 m m x 1 9 O m m X 40 7 m m ( 1 5 - 3/8 X 7 - 1 /2 X 1 6 '')

Weight.. N et 3 t kg (68 Ib s. )Sh i ppi ng 38 kg (83 Ib s.)

Th e a bove spec ifi ca t i o n s a re su bj ect to c h a n g e w ithou t noti ce d u e to tec h n i ca l i m -p rove m e n t.

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-.. s ECT I O N 1. FEAT U R ES =-____

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1. The T L-922A is a Class AB 2, grou nded gr id l inear l i nearity, and the CW Mode for l ow power consu mp-am pl ifier devel oped by Tri o-Kenwood th rough ad- tion and heat generation du ri ng extended periods of vanced h igh-power technol ogy usi ng tw o h igh-per- operation. ',,forma nce E i mac 3-500l power tubes. l t covers al l :bands 1 60 m through 1 5 m for SSB, CW and R TTY 8. linear AmpI ification Control Switch '

m od es of ope rati on. Th i s switch i s capa bl e of setti ng you r T L-922 A i n thestra ight-through state i rrespective of the stand by

2. Unprecedented Rel iabj l i control on the e xcite r. !,''!

The T L-922A is designed to prov ide stable, h igh R F tput power ror extended per;ods or con t; nuous use. 9. VariabIe Threshold Level (A LC Detector) ,

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;neered w; th Tr; o_Kenwood ,s advanced c; rcu ;t and The A LC ci rcu it wi I l accommodate exciterS of 80 w

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an;caI technoIogy, the T L_922A empIoys two to 1 20 w (nom inal) by varying the A LC threSholdd 3_5ooz power tubes to the;r ruI I advantage. I

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evel. This effectively prevents overdriving the finalower tubes, ;m ;t;ng the Am pI;f:er to :ts l:near range

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3. low ntermod,lat;on D ;stort;on and gUaranteei n9 l OW d iStOrti On at MaXi m UM POWef i.,''

I ntermodu lati on di storti on ( l M D ) i s m i n i m i edthrough the use of negative R. f. feedback. 1 O. Two Panel Metert i

l n adj usti ng or moni tor i ng you r T L-922A, one meterq. Qu;c Turn.on aIways ind icates the ( l p ) pl ate cu rrent; wh i le, with' the

Warm-up is not necessary. The 3.500Z tubes are fast other, you may read ( Ig) grid current, ( R F ) relative !!,,heatj ng. output, or ( HV) hig h voltage. This faci litates ease of ! '

operation of you r TL-922A. I, '

5. Ful l Safety System !!,To protect you agai nst any possible h igh voltage elect- 1 1. Rigid Mechanical Structure

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r;c shock, you r T L-922A has a dou ble safety system The d ie-cast side panel s effectiveI y support the weight t .,comprised of i nterlocki ng swi tch es. One i nterrupts of the am pl ifier aga i nst shocks and jarri ng duri ng ,

the h igh voItage pri mary ci rcu it w h i le the second transportati on. Recessed side panel hand les are pro- ,

d i rectl y grou nd s the seco nd a ry h i gh vo l tage ci rcu i t. vided so the Am pI ifier ca n be ea si ly ca rried. ,

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Also prov ided are bleeder resistors for d ischa rgi ng theh igh voltage capacitors and '' DAN G E R '' wa rn i ngs at 1 2. Vernier Plate Tuning 0ialh i gh vo l tage posi ti ons. P l ease observe a l l warn i n gs, The P LAT E tu ne d i al i s eq u i pped wi th a red ucti on :they are for your protecti on. gear that faci l itates easy tun i ng, particu l arly for the '.,,

h igher bands. l t al so effectivel y prevents accidental í'6. hlewly-0eveIoped fan Motor 0elay Stop Circuit miss-tuning du ri ng operation. Controls a nd panel '

,.,,,To reduce power tu be deterioration, you r T L-922A arrangement, designed to hum an engi neeringhas a newl y-devel oped fan m otor de l ay-stop c i rcu i t sta nda rds, prov id e su pe ri or ease of o pe rati on. !com prised of a thermal delay rel ay. The cool i ng fanwi I I n ormal ly ru n for 1 QO seconds (Typ) after power 1 3. eat, Contem porary Appearanceis rem oved fro m th e u n ;t and w i I I mea su rab l y e x- M echa nj ca l a rrangeme nt a nd soph i st icated design tO

. te n d ed tu be l i fe. m atc h a n y T ri o - Ke nw ood t ra n SC e i ve r O r t ra n S m itte r.You r TL- 92 2A ca n a Iso be used a s a hi gh -qu a l ity,

7. Mode Switch for Effic;ent Linear Operation ge ne ra l pu rpose Amateu r ban d I in ea r a m pI ifi er W ith j,MO D f swi tch i ng j s prov ided to se l ect between the any exc iter capabl e of 80W to 1 2 OW R f OUtpUt ,

,;SSB Mode for the maxi mum P EP outpu t with good i

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� � , N s, D E p A u c c o A p,, p v s E E E E E w R R s'--____?--_,,',',',','.'.'.',,'',.'.'.''.',',',','.'.'.',',',','.'.'.',',',','.'.'.',',',','.'.'.',',',','.'.'.',',',','.'.'.,'.','.'.'.'S.'H'.,.E-..',",C. -'. T'.'.I?H,H'.. !.H,,'N,','.'.'.','.',!,', .!.!,',!.,','.'.'.',',!,!, ,..',,,R',,!.''.'.!E,',!,!,'.p'..',!,!.'A,'.'.'.'.!,!!.R!,'.'.!.! A!!''.-.T'.','.!,.'.'I'.'. '!!! ..',!N.',!,!,'.'.',',','F,!.'.-.',!o.',!,!,!.''.R!,!,!,!,','.'.',',!,!, ,.'.',S,,,'.'.'.E,!.!.!!,'.'.'.",,,.'."..',','.','.'.'.',',H,,'.'.'.'',',',','.'..'',',.'','.'.'.','.',''.-..',',',','.'.'.',','.','.'.-.',',','.'.'----____--_,,2. t ACC fSSO R I fS 4. Remove the sh ield pJate.A I., 5 Take the tubes out of their case ( Refe r to Fig. 1 -2 ). InrcefkU l tt yh atU npaCk y OU r T L-9 2 2 A L i ne a r m p l i e,, n d '.,i ,.s suppI .,ed w.,th the foI iow., ng accessor .,es handling, be sure to hold them by the glass envelope,I 5o 25g7 2o ' not the pl ate cap. J n S t rU Ct i O n M a n U a - - 1 C O Dy '6 Carefu l Iy index the pi ns of each tube i nto its socket. COa X i a l Ca bl 0 , 1. 5 m , wit h U H f -tY pe 'and i nse rt ge n t l y i thou t excess i ve force.C On n 0ctOfS X42 - 1 1 OO - OO t p i eCe3. Control cabl eW/8Pin Plug 1 piece( Fqo2r r1s1_15o2o1 Ts_g2o s$,;es) ,NsERT uppER s4cm Rm'o cAsE covER4. XCont-rol cab-le W/7 Pin Plug 1 piece L NErAo0lFNRGoNEDTGE 1 (Fo, Ts-1 2o is-1 3o is-1 8o Ts-43o pANEL ToP L,p ! ! !,is-qqo is-'53o, Ts-'g3o Ts-'93o, ' H,,H voL,A,E \TS-940'Series) X42- 1 1 1 O' - 1 1 PR l MAR Y PROTECT l ON

5. spare ruse, 1 5A Fo5-1 533-o5 2 p;eces .. ,,,SiITCH PLUNGER

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6. Extensj on foot J 02 -OOQ 9. 1 4 2 pieces I '

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Ampmp, SNE,L F -

7. Scr$ws, 4 x 1 2m m long N30-QO 1 2-46 2 pieces 3,m F ,A, l H EA \ \.. , , scR Ews

8. Platg cap F02-0407-04 2 pieces sE LF-TApp N, \ ' \ ' \\ g l - ' g. paras;t;c suppr$ssor ;I, ,;ghi h,nd 1 p;ece scR Ew (4 pcs) ' ,

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,1 O. Parasitic suppressor coi l , left han d 1 piece sEcoNoAR y ' !! i

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pROTECTlON ' -' '.eces

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INsTALLAT oN oF pow ER TuBEs - x\x\ \

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' p,oig,t thg power iubes ,, your TL g22A ag,, ,si \ /? <?XXm ? ' i i'

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fr Obelow. Prepare the following mou nti ng \"\? /

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hardware and iools . ,' / // -

Mou,t ,,g H,,dw,,e UPPERcoCvAESRE ) i/ / Figur0 2-1

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owe, tube, 3.5ooz 2 p;eces ,NSERT UPP0r C8s0 Cov0r.,eces ._) m Assgm bly/ Disgss0m bly.

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;,Psuppresso, co; ,;ght h,,d

2 P Sw,TcH USE #2 Phillips

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1 p;ece e,,h PLUNGER Scr$w driv$r.

re , 3 x 6 mm long 4 piecesPtai n washer 4 pieces

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. Spri ng asher Q pieces ! Tools

Ph i l l i ps screwd r iver 1 piece i \ \Small standard screwdriver l piece ,

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NOTE . A parts tray to prevent l oss of m etr ic hardware is ,hetprul. - ;

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WARN l NG . Betore proceed ing, make sure that . ) ! i' ! 'i i, i i I !! ,rhg pow0r c$bl0 ;s NoT plugg0d ;n th0w8ll out- \ 1 1

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l$t. Th0 M ETE R switch is $t th0 HV position ',8nd th0 m ultí m $t$r r0$ds OV.

Proceed as follows . ( Refer to Fig. 2- 1 ) h?? ? ?

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1. Remove the four 4 m m Ph i l l i ps scre s holdi ng the _

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upper case cover. '

2. Remove the upper case cover.. ph. i I . Figu r0 2-2 - 0 rre Po

R'MOV' !h' tOUr 3 ? M S'l!-"PP'n9 ' !P' SCr' S ru Handl;na nd fO U, f l, t h e ad Se l f - t, p p i n 9 P h i l l i pS SC r ew S h O l d i n 9the inside sh ield on the power tube enclosure.

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I p s o N J N s T A L L A T J o N

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CAUTION Tube lnstallation Checkoutpart;cular care should be taken not to strike and 1. To avoid daM age neCeSSitating tUbe reptaCe Ment,break the glass tubes during installation. Tube break- pleaSe CheCk ;age due to negligence is not w arrant a. Power tubes are free frOM SCratCheS or Othef

physical defects. (

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efer to Fig. 2-3) TeMpOrari ly fiX eaCh paraSiti C SUp- b i b r I , .' d. , .r co;, on the piate capw ;ththe,etter,,R,,or,,L,, U ''ar' U Y '?S'r'' 'n'O ' ''r'O'k'''

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Oup At t, ,s t ,, e do not t, g,te, ,,e q , , s,rew C Plate CaP SCreW S t'l9htened SeCUfeIYt' ' , ., b d Scre,s at both ends of the parasitic suppressor

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Cd Sprin9 W aSher, bUt Sn U9 the M SO t e COl M aY e '

., ,.adjusted. wCO, S,are '9htened

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eCUreIY' h8. mount ,,e p,a,e cap w;th paras;t;csuppressorco it on ' "' 'r', 'Cr'w', f'V'r' 'n 'nY O' 'rU'n''''- i

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ach ,ube observ;ng the r;ght hand and ,erthand co:, S'rY Ma''f''' iS nO' ''!' i?Sid''h' U?i' 2 Refer to Fig 2- 1 The i nside shield plate includes the �!,

esignati ons l f the screw hoIeS do n Ot al i9n, Shape ' ' ' �,' high voltage secondary protection switch plunger (a,the Coi I by Sl i9ht be'di n9 Or eXtend iD9 by hand fOr bakel ite bar) Position the plate so that the pIunger wipreci se i nstal l ation, keepi ng the Coi l beI OW the teVel 'securely engage the spring plate for ungrounding thelof the pIate cap. , h.cAuTloN.. pait;cular care shouId beexerc:sed Jn not

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., . , d. , .apply;ngexcess;veforceto thetubes. l?S" ('h' UPP'r C'

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!' !' ia !n9 ' 9'i ,!.n- �:g. careru,iy i;ghien ,he screws a, each end or the co:, i';'.'d 'PPr;XiM,a,";. ,M~, n'O' .' rO?' P'Ç' ,.'P while holding the plate cap by hand. .'S

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screwdriver. en9a9e e M ICrOSW ' C ' ,,

1 1 , CheCk to assure correct instal lation by reference toF:g. 3-3. 2-

Install in a dry, well-ventilated area, shaded from directSun l ig ht. Your TL-922A m ust h8v$ 8 m inim umclearanc$ oF 1 5 cm to th$ r$8r to 8IIow hot 8ir 8t 50 to70 C to exh$ust. ,,

; Choose an operating position capable of safely supporting1 ;OTBeEfOre 'l?Stallat'lO?, CheCk eaCh PafaS'lt'IC SUPPfeSSOr CO'll fOr ,,e ,e.,ght or the TL.g22A (31 kg), pIus a,, ,he o,he,good alignment to prevent the application of excessive force

to the tubes. stat ion ea U i pm ent.2 ; Letters '' R '' and ' ' L'' on the co i Is shou Id face up. . . T, d ,3 . Temporar;Iy ;nstaII each co;I on the;r pIate caps before t;naI LeVel yOUr TL 922A In OperatlOn. e heate e eCtrOdeS in i ,.tightening. Use # Philips screwdriver. each power tube will be distorted by gravity resulting in

shortened service l ife, if slanted beyond 100. ''!.

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a spR I Nc wAsH ER

2.q Ac pOW E R SOU RC E

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F,AT wAsHER USe an AC PoWer line haVi?9 SUffiCient CUfrent CaPaCitY

, , or the performance of your TL-922A will be adversely

IiI 11l !, ! ii,'I'I Illll arrec,ed by ;nadequate I;ne regu,at;on. In ,he wors, Case,do no, devía,e ,ore than +_ 1 OO/o froM the rated input

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�,, ! ' voltage for which your Amplifier has been set.\ ,, \ \ ?

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.5 LINE voLTAcE cHANGE . ;.'

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WARNlNG

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DFIRSoCOM rNHEECTTLTgH2E2AACBEIFNoPURTE pPROoWcEERECDA,NBG

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m?? / hmm? ?? The inpUt Voltage Can be Chan9ed tO either 240V Or 1 20V aS

II - _.__ . requ;red, by chang;ng t,e power transrormer :nput ,:nks ,. ,,ocated in the duct on the rear panel. ',.,

N OTE ; The TL . 922A was factory set in the 240V position. !,,,

figur$ 2-3 - P$r8sitic Suppr$ssor Coil M ountin9

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� � q T o o m T G o A R R 2 E o q o L u A / N 1 y 2 0 o v + L 1 D, o N c o E v To ,hange link positions, remove the access ,over by the Trio-Kenwood's transceivers Series TS-930, TS-940,two black snap fasteners. loosen the screws holding the TS-830, TS-820, TS-530, TS-520, TS-430, TS-440S,shortin; bars, a few turns only. (0o not loosen excessively TS-1 80, TS-1 30, TS-t 20 and TS-900 and transmittersas they could drop into the Amplifier.) Draw each shorting Series TX/T-599 are all suitabte exciters and will matchbar upward for removal. Replace the shorting bars for the the TL-922A in design as well as appearance.Operatin9 VOlta9e deSired aS ilIUStrated in Fi9. 2-4. Ti9hten orE.. when the Ts qqos ;s used, the mod;r;c,t;on ;s ne_firmly. Also, be sure to tighten the screws from which the cess, .ShO in9 barS were reMOVed. Rerer to rs qqos ;nstruct;on m,nu,I.hlOTE.. Fuses need not be changed in cúrrent rating whenthe inPut volta9e iS chan9ed. 2.g ANTENNACAUTlO ExCeSS fOrCe MaY break the terminal StriP. your TL_g22A ,eq,;,es a, a,,,,,, h,v;,g a 5o to 75nimpedance and providing it is .2T.h6 POWER CA lE (1 ) Rated for 2 kW p.E.p. input power ,ed w ,th your T L_g22A h,s no pIug (2) and, exhibit a low anding-wave ratio (SWR) ,tsDOeW,'df. 'acbol',,SUe,PtPla pIug m,t;,g w;th the wa I o,tIet. Desired SWR is 1.5 to 1. or Iess. A higher SWR, 2 OfaTthe b ue and brown Ieads a,e power, the green Iead ground 3 tO l , MaY CauSe diftiCUlt rnatChin9 Wi th YOUr TL-as , IIust,a,ed ;, F, gu,e 2_5. 922A. ExCeSSive SWR Could melt the coaxial cableand antenna. To protect your TL-922A againstadverse SW R effects, use an antenna tuner. Note thatfeeder radiation due to m ism atching will cause TV l,

An H F AmateUr band SSB Or CW tranSm itter Or tranSCeiVer BCI , or sj, ;lar R f I.

having an RF output im pedance of 5O© and output power of80W to 1 20W is sutficient to drive the TL-922A. Exciteroutput exceeding 1 20W w ill cause overdrive, resulting insho ened pow er tube lite and distorted output. To lim it the BLACKpow er level above 1 20W , use an exciter having an externalALc ;nput term ;naI. W HlTE

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� GREENCAuT I ON . BE SU R E TO TI G HTEN A L LSP''' 'hO"'n9b''' LoosENEDscREws. F;g,,g 2.5 - powgr cgblg coIo, codga'e teCU'ed 't terminaIS 3 'nd Q. use # ph;I;ps screwdr;ver.a . 240V settingg ' ! o o ' o ? i ' 2 s q 5 6 7 8 ExC,TER TL-g22A o ; !. ! , - ! TRANsM, T !i R L CONTROL !ib . 11ovsett ing R,,,,,E , ,,,! !!!!,,, g' ' o g TCOIRACULC T ! ! ALC CONTROL !!!ALC i O -20l 2 S t 5 6 7 8 , , , Figurg 2-6Figurg 2-4 - Input Volt8gg T$rmingl Bo8rds f cit0r Con ionI for R L a ALC 0mrolI.

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2.g I NTE RcoNN EcT I oN (The ALC ou tput at no signal inDut is2.g. 1 G Rou I N G normal ly posi tive when not connected to

conneci ihe G N0 posts of the T L-922A and the exc iter. )exciter to prevent posSibIe eleCtriC ShOCk and The R L

, or st,ndby control , ; n the exc;ter must be ..,

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R Fl. The Wire USed ShOUld be aS th iCk and sw;tched to g,ou,d ;, t,ansm;t mode, as ; I I,strated

short as possible and run to a good earth 9roU nd. ;n F;gure 2_6.2.9.2 CAB LE CONN ECTlON NorE ,. use R c_g/u, R c. 1 1 /u or heav;er as

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Interconnect your TL-922A and exciter w ith the ,,te,,, c,bIesu ppl ied cables as il lustrated in Figure 2-7. '

N OT E ; I f a n SW R m ete r is C O n n e Cted be tWee n !iNorE . Ir you use an exc:ter ot another brand, ihe iL.g22A a,d ihe exc;ier, iotaI co- t

replace the supplied conneCtOr With One ax;al cab e engih must not exceed 1. 7 m. appropriate to your exciter. The e citer jused m ust accept the negative-going A LC tvoltage from the TL-922A. '

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Figu rg 3- 1 Front P8n$I Vi$w

3. 1 f R ON T PAN E L1. I P M ete r 9. M E T E R Swi tch

The l p mete r read s the pl ate cu r re nt fl owi ng th rough Selec ts Ig (g rid cu rren t). R F ( re lat ive power output) , orthe power tu bes. H V ( plate volta ge).

2. O A l R l nd icator 1 O. BAhl 0 SelectorThe O N A l R i nd i cator l i gh ts u p i n th e on-the-a i r, Set fo r the A m ateu r ba nd in w h ich operati on i sor tra nsm it M O D E. desi red.

3. PLATE Tu ning Control 1 1. LI hl EA R SwitchTh i s con t ro l pe rm i ts y o u to tu ne t h e p l a te ci rCU i t to l n th e ST B Y pos i t i o n , th e e x c i te r ru n s st ra i gh tthe deS i red t ra n S M i t f re nm , a n d i S e a U i p pe d w i th a t h ro ug h. l n the O p E R AT E pos i t i on , t h e A m p l i f i e rred U ct i o n gea r for e aSy t U n i n9. a u to M at i ca l l y k ev s w i t h t h e e x ci te r.

4. M ultimeterThe M u l ti meter can read the l g (grid cu rrent), R F( rel ative power output) , or H V ( plate volta ge ) as

. selected bv the M ET E R switc h.

5. STB Y l nd icato rW i th the u n i t tu r ned on , sh ows u n keyed or rece i vesta te.

6. lOA0 Controll m pedance m atches the pi networ k to the anten na.

7. POW E R SwitchA d oub le pol e sw i tch com pl etel y d i scon nects th e ACi n put trom the transform ers.

8. MO 0 E Switch t f o r SS B o r CW. F or R TTY o pe ra t i o n , set th esw i tch to the CW pos i t i o n.

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Figur$ 3-2 R$8r P8n$l Vi$w

3. 2 R EAR PAN E L

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1. Cool ing fan 8. R F l N PUT ConnectorThe Cool i ng Fan coo l s the poWe r tu bes a n d effect i ve l y Th i s U H f -ty pe con nector i n puts th e R F si gn a l fedkee ps th e i n s í d e te m pe ra tu re f ro m i n c re a s i n g. Be f r o m th e e x c i te r. U se t h e s u p p l i e d ,a b I e.careful of hot air (500 to 700C} at the exhaust Port. g

. RF ourpuT Co,,e,tor ..,'

2. Line Voltage Change Term i nal s Th i s U H f -ty pe con nector feed s the R F ou tput to These te rm i na l s a re t ocated beh i nd the rear cove r, th e a n ten na. ,

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Wh iCh iS reMOVed bY PU l l i n9 the tWO Sna P faStenefS. 1 o. cN post ,

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FOf i n PUt VOl ta9e Chan9e, PleaSe refer tO SeCti On 2 .5 use th ;s post to grou nd the T L_g22 A to you r exc;ter '

3. Seri al N o. Plate and stati on g rou nd. '!

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Th iS Plate iS StaM Ped W i th the Sefial NUM ber Of YOUr 1 1. FusE HoIde,s (2} '''';

T L-922A, E,,h co,t,;ns a 1 5 A ruse. Ir e;the, o, both r,ses a,e !.,,,

4. R F M ET E R Control b low n , dete r m i ne the cau se before re pJ ace me nt. ''' This control is used to cal ibrate the R f outDut read- 1 2 pow ER cabIe ''!.i ng. For cat i brati on, see Section 4. 6. ' Ac pow er ,.s suppl,.ed to the a mpI,.F,.er by, three_w ., re ' .

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5. A L C A DJ CO n trOl ca b I e. ( S ee se ct i o n 2. 6 ) ''' ,,

Th i s con trol i s used to ad j ust the A LC vo l tage. f or ,.'"adj ustm en t, see Secti on 4. 5. '' ,,,,

6. A LC O UT Jack ' .

Th i s jack feed s the A LC vo l tage out. ,

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Th i s jack i n puts the tra nsm i t-rece i ve re l a y swi tch i ng .,''''

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