dynaco pas-3x stereo preamplifier - assembly, operation & schematic

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  • 7/22/2019 Dynaco PAS-3X Stereo Preamplifier - Assembly, Operation & Schematic

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    STEREO PREAMPLF

    NSRUT NS F

    B ANDOPT

    " . '

    ,." ( .

    SERIAL NUMB

    This number ut b -d coarg i qup.

    (- 0

    r - POST OFFICE BOX yC 1c- LE RAD CAMEN AVENUEILAKWO. N J US

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    Is :

    O

    SPECIFCATON

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    IN STRUCTON S OR A S SMBLY O HE DYNKT PA S-3X PREAMPIFIE

    The DynaPAS-3X stro a is vsle ohnn cntr w r oteepi rpucon f ny prgm o (o , oho aio ter) wth y mmpli. prml s i o o o it

    ow os ad dorto, pvs strikng simpci f e wh u xiii the n-ias's ul ajume

    T iit f D s uqu, ad is a subj ofpan applato. All sgs are enc in fdbackp ajs f n ou iiu of do-o no Sils on thrh ame aeo ly cane pag hu h nt a chaaes r idal e goa ofany hg picti d pdu-on o he orl g wio cg

    T ppi si a v . Th eul s o n omo th hanl. Thi

    powr pply onain ul-wa rc d pweranf pae ig e s u dd c o ha e flme o tu h oo he wy pactial no h th a-

    T ein for o val futns erea uaiz-pir sg: ghan ri o bg up l o c dev gni hnogag d a m e m th o aya haci on runy o. hee nof sa r nd ohr for ih honcce h ring w o c o th twampiyg-o orol P, on o l on rcl. H lvl l u hose rd unr ouh g d ui f oumcontrol ton ontro nd sr ntrol ni aeolish a he ont n th ccH.

    Au t a h annl ar sni d-ede, ool uo mmn o bo ali u F exme one v ros he lu hanl it. A l n i o dj h lvl b ha A bld , uqu D mrolle ru f h erhni t d lm y pibiiy o a "o n h dl wcacrz m p o phni so mlTe lc t lo nro bh ns imouly do idi whg no of hlr ld Howvr tone onol fr hha a e becaus h fond hac chann mt ivJ e t be lp

    ao, h bnig n r o obp oni

    So of e b u Dynakit in hl rt t n ih he i poblyo rdi f grd o upu h am i h y iation a h vl i lwrd. h m i ooher dg h b oml iin i Dy-ki i So he b n ada hih r oobiou ver flwg on h h pto o Dy

    Yor Dk a e ig iv uong c, o , ad p fex-y hl no m o ml ad y. s nt pi of thete sm whih rg ls onnc. On

    th e o a al o th ut ad nnio. Ts me wo op. T ur r is othe hannl T owr s fo th ght "B hanl If ou t s s monophol oou n upr ow aloe atoug n omexemlyp m s i migt be thowe c f ipu og umo l i or He in h e pu u h , the h d ke r ptc l l uiee.

    Tw f ce . o h d d o," co t pomli p. T mkd u" ll sg pu o e eoe f o m pu o ca h c. W ng t n-

    on y sig gng toug pap an e g p der h e om]l and e of th pmf nt .

    T r large m o iu ea T lw l pu (wh ilud y equzain lo lve r netnh , h e dek h t i w ltrc iato "calh pcil np viy unun xa onoa a tqulzato hc,

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    l

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    an a a wh

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    h c. If y he mlpx w l ml lx pt hmll y igh ll ip.

    A o e bk f r e fu A . wt n h n l'on- w nd two e l o h im Sw be u a n unr, n wi g a whn wh e am nand o. he -ihd ls sod u o vil o p r whih mnl wit- t ppt .

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    h nrls. Wn hobe

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    t a i l of r nrl antch hes w d t

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  • 7/22/2019 Dynaco PAS-3X Stereo Preamplifier - Assembly, Operation & Schematic

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    ousy and des the necessar changes al te dt og Beow swi sa small slide swic laeed PP Th i part of thseecto cto We ts swc o " (ts th noal ostion ), rogra er to w e swi i t os hrough prmplife.Wen his with i o "tp, oly sigal hc an thru l sin wic spd p ipu ocket-nrly h oupt f aa lab . owee te wih is n

    "ap, i ure h l ih is ll be avaiabe t p uu sk r.The eason for hs gm ha mchinew as an had o oo uross brorig pogrm maral letd by h lecorwic whi ipping h back d fopmit the ser to cpare e so o m whe sn o th p mchi-lig A-B - f te ecrdg

    Volume Contro

    Th ouut f bo h hls s on iJulby voum c Th saly o l ges

    c kn o h o stereo c h h pr-

    gr e n n blnc ove mot thrng f vlme cno. ' tp o Us ontrols chse o povi a w rs n olum r hs hlf of r ad m pd v icabove 12 o'clok. This eablsmost satifcory operaion

    boh lw d hg ciy s ks. l vol-m o rl ldss stch whch pers you d lounes cmpt ll ig vlm co. B o xr me frequnci t low lev Is of und, when music i

    "layed softly, it souds thiner. Th loudn s compensa-tion gives incr as d bas below 40 yces and fectv ly

    moves th lt-r owar th front of conct ha.Whn h w h o, hr frequy drimia-ion in thvolumeool c, ad s wl be prefd

    by th hig felity puri, but mos )j tners wm ndthatts use

    mode

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    ldering tchniqe s b facry rul ay ronc upm. AL SOL-DERING MUT B DNE WH O OE SOE i no wan n y upment i whc e r h b d. Make te sd rkd "Rs Co" If u sod on an oin of whc i doubtfl it i o obtin 5/50r n or ler. Wv eri qir.t mb stutom pef i y ( S) . bo s not sho fe c is peci, it inatha fhe c w m t t eolr

    Sli amlhd y h the j wh hn unti se i o n o w e uch t j I i t fd the houl be t jni o o a o Af h dr fows, the o eld n la f fw dn rv i tha ha th of cnin-h an i t c i ced. u t w t sh rsiio f sld pet

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    pli su l A in h sld npla a P int f h la i wgd w p f p l t rl t lg w ni fw g A ll xtrmy ul wnokg n n . If sl g i u, tl d ron t n atall f r ha rr i light wr

    Ce ld hl b m a d; thg i an t e lw cn o l h uly mp.

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    Mechanil ssmby of frot p sumby

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    Tit t a 512" lk . Frm ne f n o PL u S CoP thl lu

    w gh ck i 14" k i t i v. m h v r t l #1; on e hrt l 2

    3 ) m d t .02 to o ndl V" pi of sul ig Cne l Coc h l S l S c

    O f blck tlr r ug FS u FS

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    d mg ng- g n sto thrug FS lug #5 n nnt to S l #4I ) nt h t nd o e sisto to lug d f to sou ld be tm to size ash to mak p a cois.

    6 1 C n d of d w t FS l ug #6 ( S J I Fe on end of 3. megoh I ange-rnen )

    rstor ugh l g an F i u # 5 S ) o t' oth Pnd o FS atI S lu

    g#2.

    Connct n nd 4 1/2 ' gp r ! FS lu

    > nn o d .0 md pato RT # l I S e h d RB u # I

    1 0 t o nd f .02 md pa tor oLT l ug # l th tr o LB l u g # .

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    nt d f 02 mfd ubular cit oRT ug 1 Cnnet h r nd o lg I S

    Cone o nd 2 " d wir o RB l u g # I 1I on o nd 3% r w o R T u # 1 5 ( Cont n end 3 d w t RB l #2 S ) .1 6 Ct the 1 + ! ld f ito to .

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    S

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    NOE: lg th swh BS are unt t e left g

    Cnn n nd 47,00 om yl lo. vil -orag) r t BS g 2 t th thnd B l .

    < ot o of 6" r lug 0( S J . C the hr fnd M S ug S .

    nnct o n of 2 lk wr to S S Cont h nd to BS lu g

    nt P f 47,00 om ylowvoeoe rst t S l ug hr nd S ug #7 ( S )

    25 ( Coct on nd of red t BS lg S .t t N o MS u 5

    6 1 Cnne o f a ] 1/2 " d w lug oct h ot d t BS lug

    7 one o o -rog ) s r S l u nc tlw n o BS

    nn h m hu-ryrn s B l g

    ) c n f 3" g wi BS u S .nn th ot nd BC l u (

    n a V bc wi S ug t th t nd BC l g #1

    nnt nd wir # ot t o BC u S

    32( nnt n nd f 2" r r t u 11P th nd l u # I 1

    3: I d wir VC l u 2 onnN: nP nd n w i l u I . > Conn

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    in pl w a #8 lockwaser and nu P h mf d apit or on eithr sde of e crew , payig pat iu lar aenin o h oct of t he poiivand negat i symbol on eah on indi ca thpctoral daam.

    Plc e pi bk n t ver the po nd then p l hr s t t w cneig l u g r d h rd nd b ug fa t pow anmer. Now pa he one l ug rml n th cr

    n fs h whle smb wh nohr 8 oash nd u t. M e pr i oa PC-5 a the la

    h Th oa rd ud bw Not h o he t t U d

    6 ( The pin i bo PC-6 s n a thtr lr to, low th hi n wh 4hard. Be o in t ppl ict by he i gm.

    ) Wth fou 6 rw frnt pnlsb-sembl h main ci.

    Wirng the man chasss

    n ptd crut ard r:d_ v t. E ylt h m whh i rf to t nstuctn. Be kng acrw brd. p th wirf be onntd ht n t w t sld-ng o d g o o t . so dr l n. hP h hn ' o, rmv h , nlw f sn f s t. A l hough thtl yt p h rE g romvrtn, mal on ud o vid xcs ht Whr r nt o n t h od, i l on d; h lt th bd h i l ing nd w nd romv \Vhe h b>t a t p o the trm n ud ed ( ) Tw t toh t wo r raormr . Co ld to p n f h n pn ocet Cnn t d led pi #6 of

    2 ) Cnnct h rd-ylw o n u unn tab h qd l )

    ) C one o blak i pa of w lugs t pn 3 f onnct t ar n o V I .

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    Tw t t nm r. Pc f he blue l low l o he rtir e b w to trm nln op of ln um rt

    Tw it to a o f l ie Cn nnd o n we o h r; t o o h oh h

    lu f h r. Fd th i a f wi hg hh in h h onnc on w e pin ru o P-5 1 ( S / C the ri t le # 1 9

    t i o nd p of r w ir h /2" o T ths ogh Cct n of wr o n o o lck wi th b n h't i r. p i r huh h h te Ct h p i nd eyl 8 . t lack wi t PC 6 ylt # 1

    na i ve led o f h f -r r rr o h e ba lg f cr 8 Cnct th pitiv ld ot h apc t t l g o th n h rm i n ng h cpa h ngt i l f th, h ml a h p o

    nn 1" blk V l ot h n u # f P q-r in a

    1 0 ) C end 1 0 m - korne f h apc i tor

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    n

    d o u d pio. P 1, h m I brwn-lkoa ne r o g ud apaio - t h he n o g h qad r.

    1 on n d f 70 hm a io t f h qd cpi tr ( 8 ) nct h n t l th pr F o h

    nct on n f 4" k w lg f q apao I S ) . onn t yl 6 o f P-5 8

    onnc o of a 14 blck w lg #4 thq pior 8 onn t h d t l#1 6 o

    5 ) t n nd o n bl t h ulu g whic i o ontin o the qapcr 8 ( Se pia n ont hd 8

    Conect on n of 12" the d o h qud pir. Con o o l#4 f S ira l

    end of a 14! blk wr o th aground I in p Cnnct h e othr ol o 6

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    ) e fo t yl 1 h < i y'IPt #

    Conect th w o yl # 8 . h w i l # S 22 ne wr o r ra d h cacto fm LB

    s qi on i o e of e 8 ue i ars djnt cry

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    Coec th gn wi r fromLB 2 to fyPIt #6 1 S ) . 25( Connect th grf>n wire from FS3 toeyelet # ] .5 ( S ) .

    26 ( Connect th black r from FR 4 oeyl t #8 1

    wire chasi. Conec he re w

    Connc ed wir fm t S !

    29 130

    3

    :

    Conn' E rd r to S ) .Trm h ing ed f h capito fom R a qur, an h o 12( S \ ur i cs jan i rcu y.

    d w o ey'lt I S

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    Pnd f gren t l the bm ad insr e r t

    on n d an 8 ', / b lck yIt Th i wi ' cut' ;j[ th P lop t i H af' la tw w ' t w bard. n?u t h:1t h win' P prly

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    7 (

    ne end of a 1 " r wi to afe A lu #10 Pnd w A # 1 2 C c n o a 1 /' wir o f C g ot he ohr #7.ConnE e nd f ge w l g Cn(:t e ohr nd t r ug S

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    < 'onect o

    t d % " bl ck wi wr l } _ < 'oP Pd j n to waf l ug

    oe ed f gn w o r lug

    ot o grn re l g

    c n d a 5 / o C ]u g _

    34I Conect end of a 4 '/2" gr wir to wer C lug

    3. Conet one end o f a 6" gre wi re to wafer C lug# 1 0 S )

    6 on d of 6z r 1 1 ( S

    F eb

    F h b panl ssly h mi hssi wi o m cw

    ) nnc s c f wd pi mP #2 l u f A o # l ba w r g oul

    ( Cc n f he b k nmr ads to lg A ou 4 ( S Cnt t o b m d lug B t #4 S

    O; f g h l 0/4 l 52 d SL on ) sU t lt w S8 P % ok

    h f, n i SS d w a n r h he d n h top

    Cn th rt w fo SS A u

    o S onn h d w A u y

    l t o 6 hr bl w f 88 wa A ug 3

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    nn SS l okt ( long 8 .

    n h w om SS 7 o gh Ong u

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    Po the ln b wie f SS w A l u g s t w wn h oo h and Wp w h h m u 6, d 8,nd h d gh inpu k S _

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    ]4 (

    o h wre r SS wf A lg ghtsk S .on t m SS wa A ug r ih scket #5 S t r i 8 w A u h #6 S n h l d w wf A l rgh t

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    5 1 Y DC6 1 35 V DC7 08 8 V D9 5 5 V

    1 1 75 V DC

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    D4 Le ha 1 5 C 00 V DC7 0

    B 1 5 DC9 5 .5 D C

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    330 V D

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    9 1 Cnnt the red wr rom afe ug PC-6 #3 S

    20 1 onnt h r f wa fr B -16 tP-6 erm inal

    onn t gn w i r aer lu o t l

    Cnn n ren afr u # l oMS u

    h P l rmina l

    t h shor l:k wr fm waer u g tPC'-6 yiP I S d l in t hP i r a I b ow t h a d

    on he gr S (' l g e lt o PC-6

    ! Cone h l ug sot ng lu S ) .

    t h gee ir frm S l u g lf 1

    h r w i e from S wf l 1 lft k 1

    Poin h ln ck wi f S wafEr lu g a he N'ar f t< fr. a blo th ar l be rd k l r t n wist p sf wir < nd ros h r rd.

    1 2 A X 7 b in h o h r- d T 12X4 tu o o h p kt o . Isl pilo g E u -td o h i o pl w toug U1e o s d r dri i i h n h iid o ot pT o wo hs oo p ar d ly ck fo c nlo Is m le n ee m fo h le ough Rmov n o h iv tfn , u1d l n oo o a par te k n.

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    The pilot l ight jewl shoud be i nsrdthrough he fron p l te a sed w l p z open by ipp i t wh pliers. he fnt pae, ur it ith:" nuts on ch on t U car avod frn ate.

    rg kbs on thes w t and volm

    ighns

    n t h' or in

    f h shaft,n suld ully cn t h osid i piidcates vn 'lk -hed. kn 1n nr l. R t e ful: cn-kw, lPr tha it ind s h lng rectangl knbs on he alc

    fur nP -otrls sd tr i ym r f wpv wln raig u .T h t s ury

    INTALLNG YO PEAMLFE

    Yo Dya m svs as t col ntr fr i s, a d i quiy lvl wcju h nt sit quin ond o cunt y.

    u av cm ed , te PAS-3X dign towk pow u imC(S 10 m i r. rg : n pu T b i lde l genr vb Lb asr vig inpu mf'd hm w i qur gh a u in p u l

    i t B P- r d i d n: f ld ig t ac mx rai c skr i i r Oync k er . Im h of l vb fm Dac ust

    S y dr u hdon w yo muc y ms be ncd o h tt of h pl ord ih h hadoe mua'os I ot o ce hadpodcly t h l.

    Wh sg in , v no a u cu du a d, f e pc v ha. We is m, h h b uu i ggse d h rbbr o d . t r Dnc

    $ w k h l nd cmmodts l kn up COD .

    ADDIONA EOHON ONOL UNONS

    Th x nc]jn occsnn t ctio hich e a qdon u f ddz in g. T( f p v ah s Bh e ddd s h udl-tw s ea i t h l

    A hid eer ch u a dd h h requ to Dy he da w dn

    PIAL INON FO OPONA

    O POW TANFOE

    E

    V O H 1 , V

    k uPd h p t cn b i or l AC r oow:

    for J vo opation1 ) w tge t lk k- d

    n oh lg f u t 2 I Tw gh h l-t l

    n ug l

    vl pen l A C v e ug l b v ott

    d i n d h rIsul hs wh l u atte

    ENJONG EOPHON ON

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    h p pduio f mc di troug tPm iE h llo of dnil ignl o opp ph l h r i o wtedl i omp i uput. Th ru r pa I l th two i th rid or tpl l th o f drnt icl pamp I t pr : gh l y d fH' n . vial cmpots l iminat popNy Dy i mp cil mpo w ih d>N resse chara- o h pampl p lyac hrtersi v

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    14

    N CSE O OBE

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    hm a s w lwy is h i gh setingdpdi o speaker i shis wold b mkd by he od soud . Howeve, i tsoud b g l ii bl normal istng lvel wlw b appart hig vome otro gs. Wiht ol ume hh n ipt nntd, ihd lud han hu he o, d dpcial inu.

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