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Ampex 350 Operation And Maintenance Manual

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,. '' moDEl?,3'' 35o...
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OPERA lON AN D
''' , ,, MA3NrENANCE MANUA-'L
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Summary of Contents for Ampex 350

  • Page 1 ':,,. ' ,. '' moDEl?,3'' 35o.., - .g 1 - OPERA lON AN D ''' , ,, MA3NrENANCE MANUA-'L '.^', ;;v:,'...
  • Page 4 T TTTT 6i ' IuTIO5 IYSTi T LATI 2. l Mounting and 3neconnecin 2. 2 A. C. ower - 2, L 3 0ut, ut. 2. 3npu 2. 5 hones 2. emote Contol 2. 7 6O uycl Amliie 2. ù ccess 'to Console bine .
  • Page 5 djus tme ts -. 5, !_ Teu nd ewiJ ensio . 5. 2 'he Tesion -, 5. 3 ,3sn der essure ßep3ceen 3 es ,, . J ^ ching' ecuions o N-otors , Mahe _econdiionj_n Jd e, lcee't TOI A v '-''3L- Y ecrd m-mifje lybaclc mliie 3ias nd rse Oscillor...
  • Page 6 emote ontrol Unii - onsoe ^ervice Accessibijty ec-hnical Assembly Svìce cces5 ( o rtab e 3...
  • Page 7 S ' I3uT303' The Aex odel 35O magnetic tae ecorder is two-speed udi0 recorde designed o use wih sndd l/+ inch ape. l-Jodel 350 is vailb3e in console, two-casepotble, nd ach-mount5tyles, al1witheihe ull o hal trah heads The efomance 5ecificaions and characeriics o he mchine e s fo1lows: TAP SßE...
  • Page 8 ______ __ t __ _ t level in the bsence o new sinl Thus, bia nd erae noise e included as well as plybch ampliie noise, All requencies between 5O and 5, 0OO cycles ae mesued FUTT-' R AD '-' i?\r ^eed Flutter and 'ow 3t3 tl 3 7 l/2'' Z5 %o...
  • Page 9 R0RD I UT: & swich llows the recorder to accomodae eihr mico- _hone level low impedance inpu o to bridge OO ohm + q VU line, balanced or unbalnced. inus ßO dbm a the micophone input will produce the recom- mended ecod level.
  • Page 10 _eh t wa s. e :",ole Tpe Transpo se -Jeigh m. CJ/'' , ll --.,ri'dh 2-/-" eigh^L 5 -,!?o4-nds Eleconic .sserly G07 ..3owe Cu,3l/ '' a5e (wih. e a ?,ace o mie. o ca'le 5 ae) 33 eig3t 1'' eh 3'' :idh m..
  • Page 11 I^ T. _TIO. l MUTI' T'i R' CT30 3 0 TP T: Befoe ope. ati'ng the ecode, ea-. .the f.ollo. win se.G.tions on 3T A - A T3Y a nd j- ;'. I.0 ,. . .3, '-îA U T 3^ Y: o not atemt o lenghen he head cables,_, Addji0ncal cable caci will affect the equency chaacteisics, .
  • Page 12 __ 3 t t t lt t t tt t t t t t 9t C RaGk oun ì...jogls a Mo4n mahie hould be r,4na o a tandd l jnh ely rak wjh=h'e' 'i,te'chania3 ;.embly above the rnaj 1eonì Ranel. he i Jeconi .3wer uly 'ael should be munted diectly above he e hanic'al'---'-6'' emy' .oliiae e possiility of 5O ycle field om enavring ehe lectonjc .sse.mbly tw3 /iodel a_ 5 eoders are o be ounted on a andard rac...
  • Page 13 line o ound. s necessay to upply O oh ermination to &i o\put at all ime in order to maintain correct meter cai.bration while rcodng or playing bck, erefore, if he output is not feeding terined ine, or if the outpu is not connected 4h s .on remote pickups, th 3ne C4 Termintion w3ch, (4.
  • Page 14 RD' po3ition nput 1evel o minus l0 to plus 1O VU cn be accom-mo dted Te load. plaed on the ine i approxime1y 0, ohm or bidging hìghe o lowe level line, &n Gxterna1 bri de ca e wied i.n he 1îne o the mchie. is o4ld c0nsi two eitors, t e age in series ih e4h side the line 5 h- 5 o re3 istor s -ou 1 d er minte eaGh 1eg o he ou ide of te two bridgin reist0rs T e 34nc i0n o dhe o 2oh3m,ses,is,o .shouh3d o :o h i, nound,...
  • Page 15 2.7 ' O'u7.i'A_!,,'r? I l\:' ' (^ior D. rive .0o awe3 vn _,?. / ? '' Jv3o l,læ ''-eed oc3 qu_imen cn e lu'ed j_-n die_^ly at J5O. !?- . TiTo e.r cOnm -neceions re ecessay. f ei'ner of hese uni'Gs i5 used wit3 he ecAJe, he 'ontrol icu'ís ?use_''- =n3us'be'-in'c,-- e-sed'oD .mpees o no _ernove the -''u---m- y Rli36'-' ? 5O3^ unless o'ne' oh'se uni'L-s js 'o e co-Lected 2.
  • Page 16 _ ahehmeesponmsmecmhecapmpoxm agely tlo b be lotw oe he fol.loing pocedue is rec. mmended o cheching he peformnc o this recorde g ime o insXllaion and a5 necessaryheeafter A. vell equeny Resgonse; ^l he. ad a n.ev'' a.eel of age on_. -he_ ma'ch. ine,,' quli2aion cuves fo he Recod'--nd.
  • Page 17 tf t C, Disoion; Overall disoìon can be measued by connecting any sanard distortion measuremen appatus acros5 he oupu The redings om a wave anly2er or se.lc€ive fequeny disoin meXer wil,l be ore accurae than hose fom a nl3 e instrumen a 1ower distortion level, istorion readings e somewh dep0endent on ape.
  • Page 18 _n_ trt _ttl+ tt l_ t l r 4 tt _ l t t| l > 5'GTI 3 - PEATIG RCS' DU 3. l R'! 3Z AYD, REu XYB: The 0del 5O is equipped to h'ndle eith''er the YARTB lOml/2'' reel of tape or the sm' le RMA -5"...
  • Page 19 ____ _ m t _ 3. 3 mLF TAGK OPEATIOY.. The handling of hal ac tapes on his machine is accomplishe i'n the fl,lowing manne. The ape is threaded and opeaed as escribed unde TAPE THEAIG and TAPE MOTTOY, Howeve, only he upper ha.lf of the pe wil be used on the hf tac.k machine To uilie the lowe ha3f o he ape, Xhe u.l3 eel on the Taheup Turnble should be emo.ved tuned ove n p1ced on the Tape Supply Tu.nable upside down Place...
  • Page 20 -- st t- orward - buton (3- 5O'b) ' . Rewind: The- Nodel 350._ cn be saed in ewind o 5witched o ewind am' y '0a the ope-.ing mades by -simly depess- ing the ewind buon (507),. ' -- -- l C';i: n us ing.
  • Page 21 before the tae is in moion, i direc m o n i o f e a e a l l o w t h e p r rm t be e thou gh the machine w i h o u t t u a l l y r e o d i n g d u r n g the e up period OE: For orret m e t e c a l i o n i i s i p o t a hat he ine Out be o pel y termi a d.
  • Page 22 __t t trt f| tt t t ttr_f r ) t r t l t 'ECT0 TAE AT MEC5 ' YT: The Tape , anspot MeGhanim' desibed in thi s--eGXion-is ued in mGhines o o 'bai-''ypes; thoe desig---d fo- -'b_oh -G'o'di. g and'plaah, and ose des igned o pla- y' b -'a- -' onl.
  • Page 23 ___ _ _ t t >l _ t . _u enon_rm semlv - i asembly onjæ o a spingpivt-mo4nted arm, a tape ide, nd a tape guid hoo. Divelok pin in the a shat actuat the afety ~witch (51) which top e maine i .the ape brea o runs o eiter rel_.
  • Page 24 t t/ / e a h 4 l 1^he oque of. .the moors in the 3ly nd ecod rnodes is djus'ed o e3' b g5i5os 5 nd c-\05 he ensiol dsXin ' r es s o s i n seies ith each oo 3n ßas ovard, he que o he ewind loo is geaXly educed by inse-ti.on o additjonl ice (503 in seies it i, n win, R.O is insered in seies ih he Taeu 3oto, .?a le bsic o-eaion of he a;.e ension syste i .il.lused in Fi gues...
  • Page 25 ROTATl 0M > '! ' ' 'a HGm ToRQuE ow ToRQuE ToRQu / '0' . ,'. , a0',,...
  • Page 26 tmt l > f t 0scillatio w0uld be et in h ed Aembly where i wuldaue peii viation in he dista o the tpeo om te head s vaiao tion would be of sufficient mgni4d to appear as a und eirable _ ..uation in the ignal level at he st8t o edig or reo0duìon e0 ee'' 3dler &m .s_ erves to abob most 0f the startng srin, ad efecively pevnt o miim2 s the te of oillatioD jut deibed e Reel 3le Pulley and Flhee3'' ,.
  • Page 27 __ 0 t L t e jn 0 he bra_ing eytem in the vriouæ modeæ o3 oerajn ig illustated in Fje and , oppoæieg e- of the di usion ave note that 3n al3 mode, he greater akin force a3wayæ acs on the tr. iline ntable.
  • Page 28 ,.?',, _, ..,,,', - FAST F0WARD PLY ' 'eCORD' ' 00 o0 o 00 ,,,, AKE PRAT N...
  • Page 29 t mHtM>ttt r mt3t H tr t t t Sop buon (50). Ti e a3't d3e i fo-rced gin5 the aPe DrVe - Cn, and owe i5 ,plj_ed o he '-'-ke 3ole-noid? (x5J5 ad '6) houh on , 5-3 and Lo the un'le oo hog'n 'he conac ""'Z- hs releing th.e kes a_d sating he ntble he ecoder j5 nO oeraing in ne _ lay mode 3e seed 5elected y 'the ?e '?eed ' ich (5503).
  • Page 30 q,- 3ßa.UI' lAINTTAl '- The;. uti'ne mainenance , rorm oulined bDelow should be careully followe0 if prope ermance is e33eced o lJe ma. hine al,l imgs, 3 i ecDm-mgnded tht v, era'ion n Vaine3ane o. be h. ep ..- . - - , - l L)i Y30 The ~apsn, the lead ace5 and ape gudaes 's.hould e clene .
  • Page 31 '.A rox3e4 ll!.nj_ci;J, '+ iv /.'.o'-' s;Od ;'OV' ::C!. dí-*,oun JcJJe o', eJrve !-Je _? sqe'' 1 9iild ic c;-!e 'io 'x:., ;.-3.l_Je d un!l5' '-e m'L-o? cn-ecoL? (:;? v--?3 r'hí icc cc- (3iíì_). ('e i'3s o0-!' -rou-;-n3 5'1s 35 l- ì:e :'a:.;î!a;-! n'e-, -.'' o..
  • Page 32 l mt_ 0l w o 0g sa he 9eco amn liier wih , bnom1 high i-n-J- sinls. -uch sinl would e dl? . ete thn J,!e 5turion or ,.5i-mely 3O d7 , esr h n -norl o ein? lgve _ o o -e5 cninuiy o he heds i''h oh ne'e ' +1oul he eds ecome' mnei2e Iy can e d&.
  • Page 33 0lt 4 my3 l t_l g t .. _Nlae ;nty' 1Om / inji 3'\Tj:-u'- reel o 3e Tae '- u,3ly urle '. Te a jece o 5jn outhiry jnc31es lon, d ie a small oo. t ech en -. At"ch one loop o 'h ax!e ancho o- he ee3 hu, and he o'e.
  • Page 34 . Atach he loo in he ree end of he. in g o s rin g sale, and ull. (The unable wi3l rotate c0unteclochwis) mce a eadin0 only when he unble is in sedy moion, as -!he eoce equid Xo ovecome the 5ic ctio wil1 9 oduce an excessivly hih iniial readin.
  • Page 35 -. v'res cJe -n,.y ''Jon, and chec1 o see 'a -Ie '. a;;-3s-an i'oleoi_J i. ì3^one, (3 he i;ns-an IJle c-n e m u5e o?í -he ' a'!3s'J-an esil y n u53JjJ' n he idle -r, i ' solecoid no booeJ. 3 I ecesay, ?ac o e loc nu j_ soleniJ doe bo-''o.
  • Page 36 _ _ c 3 n ttttltt1t t t t| RPC, 0 PA M T0E T A~ A^ W3TH E. CT~ I RAT- Tm TA T€ G3 LST' ' n pai motars for retun^ to he cory3 paju -a..r hould be_ aXen in. order to 'v-oid the ben- i. n of_ hir_ ha3t in an.it' i71e-n pckjng ' aptan rivemo, alw' ay'''i'emo e the &n and 3vhel from the motor shaf.
  • Page 37 _____5lfvglg_lnes0east0lha tdello0ehostle0ge0lna_ve_e3ltugJcyeenqelsrlroc_ynn_nl0y|tes5velalnensndghgh/egcnsnllf0_ttahgdeesJ0 v0eolnadohl0elo3leh_me | , o srews I *JolcJ 'JQ_ 0'eq g n J 0 l e u r e '- ;d o e hou5 ino.. oe "a l1ee c_r.n. 3 ing ee5 e nvlved: '3e cla. , , 3d tvo p--2'sLeel eave, aJd tha he ase-mbly ode, ?om he hou5ing -all ou s.
  • Page 38 ^CTI. 5 L TROI 5 JD The Ele,ctonic Assembly consists of ecord Ampliie Playback Amlifie and a Bias nd ßase Ocillao on one chassis The iowe upply is mo.unted o_ a 5epaae chassis Recod Amp1ifie The Recor Amlifie consists o our 5tages; a hih-ga. in penode pe-mp1iie for microphone and blanced bridge inuts (V01, l2SJ73, wo triode-connected-entode ampliiers (VO, VO, two l 2SJ7) , and constnt-current riode outu age (VO,...
  • Page 39 _t_m_o*e_gu p4pytt_ _y g p p y m laybach mplifier The lybcl Ampliie is a thee-s ge penode ?liie which ovide + VU O ohm ouput a he ine u 'on necto (O. ). The feedbck loo o ne is sa ge (VO5 ) in cludes he Rlaybach quali2er.
  • Page 40 onditin f 3e eord.e, it i uggeed ha a aid overall erormnce chec b mad0e as d0esribed in eton a_. ealign-mnt is called or oy if performance doe no all wihn he limit given in pe?. 3fiation - e olwing o ection Iould be horoughy asored efore o- ing 0n to the deails o linment pro edure 5 1 _8li,men a.
  • Page 41 A0x0yhm 4 %rt 4 A The ljíe upu us lwys be emjnated in 0 ohm hn esin0. o igning. jhe L3ut h LY' T- bI3A? jtc31 (0) in e - n, osiion or terrninae he 3 OOT exnally wi1 60O ohm esiso I is noD nec essy to Ji5m0unt the leconic s semby om he console or cse o mst ljgnent ocedus, The pocedues ha equie ench d,justmens ae specilly noed s &hey ae,...
  • Page 42 t t|t t l f y emove he wo cAgws frrJ the o, o-- the -''!ed Tousing over, d pu1l LJe cover u'enly u.!_3 and c o re-move i (The heas, 30m let to i7, 'en fa, cing the machine, e; ! se, ecord, -d lybach3, Tbe left-hand elstic so,x ut on o o he cord and layah heds is he 2inuh adjus, ìAr'T^v''T: mi Vß...
  • Page 43 4ntlt f vva_sthstowtn4n m gt4e a3t attt)nd adl3 Je * m t 3 la ba !2 u a 3 a t , quali2io-n seti g vill us u a l l y b e o n d r n o s convenien as benc h ? r o c e d u r e, T h e c v e s o vhic the mahines r e s e h e f a c t o y e s ho- in i ge 6, Yoe th h e 7 / ' ' a n d l 5 ' '...
  • Page 44 h4t _g . v' e mdjusme-t ì Thead n.e blnk te on he nchne 2. ìun 'tle jete nd utpu wich ( d-0C) o the !i \i posi'tion. u the mchine in 'he wßecod mode -d rea the ease cuen indicaXion on the VU me'e. The rea i should be aproimtely 2eo.
  • Page 45 6 dJ'use the ias Control (63 or maimum out as seen o g VU or VTV3, (I is des ible t0 be 3hin a lea0 st / db o he maximum eicieny point in orde to achieve wide frequency ange ec0rding the lower o he two vailble speeds.
  • Page 46 his and he olow, ing dJusments may be mde in a more sen5itive reter range, CAUTIO; H ßßRLA TH' TAD oug Ty vOvR, D0 T TI0T Oì-Y T00 KD O TH SC î, 0 T3m. mAD ALI- MT AY DIURBß B 07IG 0 T 3MA 0UTTG .'-.
  • Page 47 _ __ t 7l/2" qu' ali2aion e the Tape eed witch and quali2atio, n with o 7-1. /a" speed e the a. udio oGillato o 25O cyGs n te Meter and 0uut witGh_ to e . OR-BV poMtion ad se the eGod vel Cotrol fo a eadi g o -36 M on he VTVl ih to he AC EVE positio.
  • Page 48 6 , ower 0u, ply 6. 5 vJjscellaneous o not use shematic reeence numbes when odring as. The Ampex Catalo Yumbes are he exa designations fo all parts used in Ampex e quimen A'iAY ILU T4 RL0N I3VJAT - m ^ AT.
  • Page 49 _ t _ t '. l L 35 (om_ let quimen) Racc loun, 7l/Z'' - l5'', ull Trck, /03 Cycle Powe 3ac îount, 7-l/2'' m- l5'', alf Tac, bO Cycle ^owe ßack L3ount, 7ml/2'' m 35'', ull Tack, 5O Gycle owe Rch V.oun, 7 l/2'' m l5'', _ l Tc, O Cyle ower ah .ounX, 3-3/'' 7-l/2'', ull Trach, 0 Cycle owe ach ï./oun, 33/.'' - l/'' 3alf Trah, bO Cycle ower...
  • Page 50 _____ __ 0 _ 7722otg &rn e x ee renc e C log umber De s c riptjon Turnb r b. 2 TAR T MCTAYIS (Calog #57OO, 1, m2, -3) Drive Jotor A5sembly (Comlee) ee ote l 7?3/2 3'5 .p. s. bo cyc3e oo l5o 7l/Z l i.p, .
  • Page 51 tttttmwmttmttwwtwxMytwmtttdt D s criion nw-nb .?. olnoi. d 337 -!'cl 'Tcnsion Spinu- 322 r_t.!ble .d 9/ TL,eup Tension .'rrn _4s i'ly ( Co-'np1tG) 2 ndivi.u,1ly rep ,cG,1e P,t5 T,,3aup enion '.m in," .22 T Gjde 67 Tpe GuiJn ook 3 Ree d1? _sserl, (Gomlt) 0 s n ï' n- ' i- 4- éFle e- ) o 7l/211 m 1 M,-,chinw- 9...
  • Page 52 Am? e ß ee rence C lO Tumbe s e s c iion Ube r Hed ssembly (omplee3 (3ncludes l cble and , l.6s) í.itn al Trch ea s 7 5 - l 7 ì,iith mull Tch eads 75 l Individu13y e1aceble ars ae C, ing 3 ate ins D 23 lO...
  • Page 53 _ glvllMlt7_27llTF_gl JttetTo5555aaeaaeloGo?llllllll0oopeeeeseeteeeFey000nhhelgty3mtmhhttgulmlmdlmullllltpuuuuoumuuu2_s55egsgggegh7o55eh5altbtolodbolrtaucewuaehFh2gx3uvctlt63GttodbmlwxoaoattJctunolutcctgnghtlooooolcuonoee?xnttnnnn\AntnsnlltttehtxodagdtmTpgeJrlJ?ccccccuuudeDggfttgtt5JwtsTF pTttttTtttttootralc3nubLLTebtTrTlnovlaaele0leTwgott*tTacccccoccutovyhohhvhhh4hrTgnaueeltltfttlttdggn0nnlonnnrsllTggrge6ggggeytrecm\wsgwl0yeloaooe5eulrulrbloslnT5neyoslddm5eoem+gno9oyp egreceessllnllettyssuDg000omurrmelmy y _AppgggRtlu?tbT4mLTLt_t\ttl5lt3rltlrfmltrrrr4gxn4m/3mtMmllglg22b7bbog9bbo00255J3233??lll99g?7lm3t 3OO Ghm l /2 \i.? omoiion i ^s i6 o O0 0hm 1/2 '('t omposiion Resio P . 4 lOO 3m / -i?a omosition i e is to ' -. lOO hm 3 /2 '-ra omp-oitjon Res i. s o M, d l0O hrn l/2 -'irt 'vomosiion es is or R - 35/53 - b...
  • Page 54 _lll 1 JDe 5 c iion D 0V lecrolytic ondense MD 5V lecolyi onde-nse . 25 llîD DOV elli2ed ? ape Condensr O05 J adder 'Gondenser .o0 JD --dder onden5e (33/'' 7-l/''3 00O l dd0e iondense . oO5 3 dde ondene (3m3/" 7 l/2''3 .
  • Page 55 t tttttMMt a s ipin -, -h-y C í,''" u. 3 r O MF áe? Coe33. 1 . 00 j Conde';r Oo . 'Y 25 M -V 3Gtl3e ape C.n,5e Cq;/i- 1 Amp ue, omB0 FU7 3 mp Fu. -m 3 ß3ord Mdictor (e0n3 33 Cnrn X3m13 h,is Cre,r P-Ym0^ Y35-1O B 3un-t Conecto? P'5...
  • Page 56 _ t l 4 De s c r iption ' 1OO, OOO Ohm l/2 Wtt Composition Resi€or 33O, 0O0 0hm 1/2 Wtt Composition Resistor l0O, OOO Oh 1/2 Wtt Composition Resistor 33, OOO hm l/2 att il Resisto t 1%o 2, 2O0 0hm 1/2 Vtt Cmposition &eior 7, OO Ohm l Wtt Composition Resistor 47O, OOO Ohm l/Z Watt Composition Resistor...
  • Page 57 Am e C lg De s cription - .,. umbe lO0 Ohm 1 tt Composiion Rgsiso R-20 3. bOO Ohm l/2 Film Reisto t l%o ' RE597 2, 00O Ohm. lO Vatt iewound Resistor RÆm2 lO0 Ohm l a Composition Resistor ?2b. 0 7, 0OO Ohm 1/2 at Composition Resisto RZ99 7, 0 ' .Ohm l/2 att Composition Resisto RÆ-299 l0O Ohm l t Composiion Resistor RÆ20...
  • Page 58 _m __ utplytnbvlue mayllyly pen t _5gr5?3 ? m e; a l o u e5cri, tion u m e r , ' '' ^j'i - ta3og Y^7l ('onsle) alog 373 l (o3aòe e ch } ,O l -5V eco3yic ondese 'm O- -3D 50V i lec&olyic 'onden5e 00.yC 33O2O '5 - ' lecolyXic vondee 0m 2 O lJD rOV w"...
  • Page 59 __omwmemt3nhttemcyonnec4gntgxetnsmlo ntato3emmq 2t3t3c0lgndA.me; eeence a l o g umbg D e s c r i p X i o n i \ 3 u m e r 3Vecani c l s s e m b l y! a s e f o r r w ' a s e '? ' o ç b l e 7 7 ''- ec-ronî-c Ass enbl y ' a s e f o w o e - .
  • Page 60 _00000000000000000 l 00 D DRRlvEmpAtNRsE0EF00o00s0s0p0000l0o0T00lo0RA0N0D0TE0AD8LE T us RHN,TFAB L E ! REEL KN0B REl DRlVE - PN REEL .N.A.R,T,. BALL 0 0, ^ , , , . , g ' EM OVAB E CAUTlON- DO NOT PUSH KNOB A THE w Ay DoN To THE TURNTABlE OR SPRlNG LOADED BALs L NoT HoLD REE N PLACE.
  • Page 61 t o .._ W m ó 0 0 _ _o, 0 0n D w_ å 0 0 ,oZ W, w N 0 U A o ' ! ' 3 2 ' , t w qo, o o_ ? o ô 3 zo , n ,, ;...
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