8/3/2019 Yacht Boy 208-

1/6

Supt l. nert to Eldlflal an,l Rddio Tradiqt tnlr 25th, ,974

1953This serri( dtl,t is @Iright. Ilis not to be rcsold or reprcArced, inparl or i4 ,ltole, i,itltout pet,nissio .

Aultbnal .apies of rlns cha 2Sp,hcMhg pottry.. Potnvnt w horbpLze to R@tn I Dora, Ho,e,Ston{ord SE cr, Iatfun SEI 9LU

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Yacht Boy REStSTOiSRt 560Rl t(i! 170R,l ?7KR5 IOKRt loKRt2 390Rl 3 5K 6Rt a tK 5rl5 310Rt 7 !K 3Rt a t0RI9 IKR20 t@KR2t 3tOR22 3K3R23 5@KR2,T IKR26 r0R27 3t0i28 820R29 toKR3 t to KR3 2 to KR33 IOKR3,r l2KR3 6 rK 5R37 56KRl8 tK5R3t 3tOK712 t50KR,t3 tooR{a t20KRa6 390KR,+7 l2Ra8 3K3R,t9 2K1a5 t 72

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R52 5mR5l 190R5a s60R56 '057 tao208 Rtl t lKaR3l2 tKR3l3 rk 8R3t,r rKRI s 8K 2portable radio

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R6 td)KR6t2 5@KR6t3 8K2R6l1 l9KR6t5 rt KR6l7 l50KR6t8 tK'R6t9 200CA?ACITORSCl 17pC2 68pCl 0 00Ca 2x5L) .UF

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nNE of thc top -modets n rhe Grundigvrang, thc Yacht Boy 20E, is a fourDan(r modet covering the LW, MW. SWand- VHF wave-bands with particularemphaskon high scnsitivityand setectivity.Jw. lunttrg is over thc 4G5l meter bandano rs spread across lhe whole tuningscarc_Movable markerspinpoint slations, (loasslst n easystation-slection), hile AFC,wrutn ts swltcnable s incorporated o stopdrilt on VHF.Controls include a variable treble cun-lrol an d bass_switch.witchxble ia t l ight ,battery co-ndit ion ndicalor rn d in;uroulput s@xeli (o covermostaDDlicatiol| !.- A-choiceof eitl)cr u"lnur finiih or blaclnnlsh s oblainablewil l (hrome tr im rndblack scale-B.taeries. 9 volr, 6 x SP2.Meins. With optional power plck TNIl(r.WavebandsLW 2069-l 54n')MW 538-185mFM 87.5-l08MHzSW 40-5lmTdnsistorsTRITR2

TR4TR 5TR 6

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ilsrsTotsRt 56 0R2 IKR! ,170Rt 27KR5 IO KRt to KRt 2 3t 0Rl3 5K6Rtt rK5it6 3r0Rl 7 lx lRt 8 t0it t rKR2o rcOKR2r 390R22 3K3R23 500KR2 ] IKR26 r0R27 3t0R28 820R29 toKR3 t to KR32 rOKR33 roKR:f,l tzKR3 6 t|(5R37 56KR! 8 tK 5R!9 330KRa2 r50KR,l3 t@Ra,t t20KR.l6 39OKR17 t2Ra8 3K3R,t9 2K7R5 r 7Z

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Sarpt n. b n ctric.l a'd RedloT..di',t' lutv 25tt' 1971

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TR7 BCI09CTR8 2N3702 r BcltlTF9 ACI8?KTRIO ACI88KDlodcaDI :, ISI Im AAll6D3 AAII6rx Eco3r93D5 IN6OIFAM 460lHzFM IO,TMHZArthbAM Fcrritc rodFM Tcl6opic and sockct torcltqrtld

Sw Soclct for cxtcrnal and tclcsaoprcScde L.n!, L?l-7V lW.SF.Lcr. 7 x 4iin.,,+ohm mpcdalcc.Outp{t. 2W.Odlclsl. DIN sock for tapcrccord.2. Jack soclct for arphooc,hD||ts. DIN soltcl for tapcpleybaclIDind$bnr, 15! x 9i x 4lin.W.i8ht. I lb,

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DisnantlingRcmovc battcry lid, t8ka out battcpull off tuning knob aod rcmovcscrcvs undcmcathcatinct.It may now bc liftad ofr in an up

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8/3/2019 Yacht Boy 208-

5/6

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Above : Potentiometer boardLeft: FM mixcr boardnight: tF1 board

2 |Irl

Left: maincomponentboafd layout

Right: diagramof alignmentpoints

(!.7r.) lrd,lLtd.nrr-d. lft , p!!|ht a tr trc a.a.bl.El-dk Pr- ttl,Do.ri Hoc,Sortord &. t ndd sEl tlu, r.Fal-$...a !r trc !ll.- ?r! (S.t- l Dtrr|lt i.at tra, aO owlha Gi.. Lr, tddd tcr ONE{o l9t4lrc 8sl.- ?..l.a.

direction. Now push acrial |rp ftom thcinside and lake out four broazc chassisfixing saf,cw$, wo cach sidc, std ca.lfullylift out chassis,Unsoldcr spcaker leads if ncc.ssary.Service Notas

DC diglmcltDC adjustmcnts a be carricd out witha battcry voltageof 7.5V.Qokscent a{rr.|rt of ootput trarsirtorsOpcn link on collcctor lcad of TRIo,insert a millianeter and adjust R52 for areading of 5.5mA,Rcconnct ink.Sctli!8 up of IF amplilhrsConncct a DC valve voltrnctcr in parslhlwith R23 and adjust pre-setR28 for 1.3V.

AlignmantFM |tr'Connc4't oscilloscopc via circuit bclowlo point 4 tF4; wobbulator to poiot 6IF3 and sct to lo.7MHz: fully dctuo Ll6

aod trim Ll5 lor maximum outDut atrdsymmctry.Now racooDct wobbulato. to Doint l0lF2. Tutre Ll2 and Lt I for ngxinium withsymmtry, and lastly rccoDoct wobbu-lator to point 5 lFI. Adjust LE ard L7 fo.a syrnrnetrical and maximum output.With the \robbulator comcctcd trow tothe AM acrial adiust I-4 and I2a for

maximum. Now. -for discriminstor andAM rc.icction, connect wobbulator to point6 IF3; o6cilloscop o point 8 lF4 via a5Okohm had, and alis! Ll6 for m!.xirnunliDcarity al +75LHz dcviation and R2 forb.st AM rejection at 50rnv,Input si8nal to bes. of TR6 for this las!lcst.Rcconrcct wobbulalor to AM acrial(AM modulation) and if nccsssry eali8nLl6.

AM IFl-ooscly couplc osciuoscopc ao TR5 (orpoint 12 IF 3), co rccl wobbulator topoinr !0 IF2 aod adjust Ll3 for a sym-mctrical and nraaimum output.Rccooncct lvobbulato. lo poirt 5 lFland tun Llo ard L9, agaia tor optimumoutput wilh stlrunctry.Fitr8ly, conDcc'twobbulator to thc AMa6hl aod 8li8n L6 and L5 for b.st outputon'scope.

AM Oscillrtor oad rcrhlSwitch to MW, sct poiotcr of rccctatrd gncrator to 560kHz, aonocct 8rarrlor via e loop loosdy couplcd around ferritc aerial and volUetcr to TR3.AliSn L2l arld Ll8 for maxinun"Reserpointcr and 8Eocrator o l4sotHand alisn Cl6 and Cl8 for rturimum.Switch ro LW, sct pointcr atld 8ror8ro l60kHz and adjust Ll9. Rcpositiro 2,lolHz and align Cl9 for optimoutput.Finally swith to SW, discooloct tclcopic acrial atrd connea Sctrclatoran lSpF capacitor,Sct poiltc. ard gcncrator lo 6'lMHa.trd adjust L2O and Ll7 for optimum oput.Resct pointcr aad Seqcrator to 7,2MHand align CI3 for maiimum.

FM oocillrto. r{d r.ri.lConnect Sicncrator via a 60ohm ceto mixer ioput C3lli sct poiDalr sinput si&nal to SEMII?i sod sdjust L2 aLl for marimum output,Finslly r6et pointd and Scncratorl06MHz atrd aliSn C324 aDd C314, bofor optisrum outpul. Oscillator voltaf,rTR2 cmitter should bc ?5mV.

3D

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outpui atrdto Doitrt l0withreconDct wobbu_L8.td L7 foroutput.

connctcd now to1,4 atrd t2a fordiscrimitrator aodto Doiltpoinr 8 lF4 via aLl6 for na.rimumand R2 forTR6 fo. thh last

to AM acrialralign

AM Ofclltrtr rld tctldSwitch to MW, sct poilrcr of rcccivcratrd rcncralor to 55()(Hz, coDtrcc-l8ld!ra'tor via a loop looccly couplad around thcfcnirc aerill and vo|ttnctct to TR3.AliSn L2t and Ll8 for marimutlReset pointcr and Scocrator to l45okHzand alien C36 and Cl8 for rnsrirlum.Switch to LW. sct Doi cr ard Spocratotto l6OkH2 and adjrfua Ll9. Rcpo.itiotrto 24okHz and aliSn clg for oDtimumoutpul.Finally switch to SW, discaDFl !rlc'scopic aarial atrd coturcct StlcBtor vlaan lSpF capacitor.St poiatcr aJrd gcnc.ator to 6'lMHza.odadjut L20.od Ll7 for optimum out'put.Res.t pointc. and gercrator to 7'2MHzand aligl Cl3 for marimum'

FM oscilhtor rtd r.ddConn ct Scneralor via a 60ob0 csbhto mixer i-oput C3ll; sct poiDfcr strdinput signal rb 88MHz. 8nd adj$t L2 rtrdLl for maximun outPut.Fitrsllv r6t Dointcr and gpncrator tol06MHi atrd dign C324 atrd C314, bolhfor oDtimum output. OscilLtor vonaF alTIt2 cmittcf slpuld bc 75mv.

to TRJ (orwobbulalor toLl3 for a sYnFoutput.to poirt 5 lFlfot optimum

to thc AMLJ for b.st oulputrame-day crpatchis ar ncat atyoul telcphone-try itl

+5 rflE SROADWAY-ANWEL! LoNDON W7 0l-567 5''O07l l.\AxwEl,TON D-P ISIEY RENTREW O'tl-l3t 49'1912 wasT END- STREET SOI{EnSE' Oa''', 259'Ati lot vottt ltee oty ol out 60'P'F t'tttwt

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