Ampex 350 User manual
_l_|httt __lo_0 __ _ _ /0
':,,.'
,.'' moDEl?,3'' 35o...
.., -.g 1 -
OPERAlON AN D
''', ,, MA3NrENANCEMANUA-'L
'.^',;;v:,'
_f
T TTTT
6i' IuTIO5
IYSTiT LATI
2. lMounting and3neconnecin
2. 2A. C. ower
- 2,L 3 0ut, ut.
2. 3npu
2. 5hones
2. emoteContol
2. 76O uycl Amliie
2. ùccess 'to Console bine
./ Access to Unde5ide o echnica3
5semblyCse inTo rusec oable
.1O vel.leformnce hech
PRAT0 R O''ur DU
3. leel i2e and Reel 3nobs
3. 2Tape Theding
33 3l Tch Getion
3, Powe
3. 55eed 5wiXches
3, 6mlae loion
3, b. ditingnd Cweing Techniques
TAl^iTAP0T GHAY
.l. ljo Asemblies
.2 .Tape Tension 5ys'tem
.l BraXe apeion
42 2 Reel Cie wich
,3 -elay peraion
3l 3l3y
.3. 2 ewind
,3 3 FasFoward
.3, Sto
3, 5ety nelochs
,ouine 3ainenance
,l leaníng
,4. 2 ubicaion
43 Head emagnetítion
djustme ts
-. 5,!_ Teu nd ewiJensio
.5. 2 'he Tesion
-, 5.3 ,3sn der essure
ßep3ceen3 es
,,. J ^ ching' ecuions o N-otors
,Mahe _econdiionj_n Jd
e, lcee't
TOI Av '-''3L- Y
ecrdm-mifje
lybaclcmliie
3iasnd rse Oscillor
rU/Jetg and Jonitorio
Power3^u-,!3, ly
ß3ecroniAlig nme It
5, 6_l Al.i,nment nJ Te,st qi;,?e-'
e quiemens
5, 2 uenealrecuions
5, .3 Playbch CicuitA-lir-!e
f 6,, ' send _ecod ir.uiAlinme;
ST JT
odel 30(íuompleXe auipen')
TapeTransor echanism
ecronicAs semby
is c e lane ous
TpeTen5ion ytem
BaheOpDetion
ReelHodown Knob
leconicAssembly (7 3/''-35'')
ÆlectonicAssembly (33/.-''7 l/''3
TapeTranspot Conol ' ircuits
PoweSupply
Input
laybackquali2ation ' urves
ecod Equali2atioCurves
lec-onic ssembly -i ront Panel
ßlectronicAssembly - op an Rear
lectronicAssembly - otom
TaeTrnsorX echanism -To,
pe Tanpotlechnism - otom
TpeTrans_ or echnism m otomßon
TpeTrans, ot V3echnism -otto--e
__
emoteontrol Unii
- onsoe^ervice Accessibijty
ec-hnicalAssembly Svìce cces5
( ortab e 3
______l __4 _l T0h 7o db _ 6 0
TI l
S' I3uT303'
TheAex odel 35Omagnetic tae ecorder is two-speed udi0
recordedesigned o use wih snddl/+ inch ape.l-Jodel 350 is vailb3e
inconsole, two-casepotble, nd ach-mount5tyles, al1witheihe
ullo hal trah headsThe efomance 5ecificaions and characeriics
ohe mchinee s fo1lows:
TAPSßE
7-l/2inches p-e econd and l5 inches-er secondo
33/inches ersecond an 7-l/ inces per second
FR;,, UC Y R5G5n
eed Re 5o nse
3-3/4"+ 2 db 5 o , 50O cycles
7-l/2"m 2 db 0 to lO, OOO cycles
+4 db 3O to15, OOO cycl
35'' +2 db 3O o l5, o cycles
IAmTO -TOI6 RA TI
^lax ecod evel o , gak ecod Levelto
SpeedUnweighed ois e Unweighted Yois e
3-/bo db 5o db
7-3/2''ull Tch 70 db ull Trck b0 d
lTrach b5 db 3alf Trc 55 db
5l
al Tc 5 dbIal Trah 55 db
Thepe ecodlevel is definedas h 3evel a which the oveall ( inpu
tooupu€3 ol lharmonic disorion does not exceed 3o when mesued on
OOcyle tone. oise is measuedwen easing a signl opeah recoding
35o- b//53 3
________ t __ _ t
levelin the bsence o newsinl Thus, bia nd erae noise eincluded
as wellas plybch ampliie noise, All requencies between 5Oand 5, 0OO
cyclesae mesued
FUTT-'R AD '-' i?\r
^eedFlutter and 'ow
3t3tl 3
7l/2'' Z5 %o
l5'' Z%
Thelutte nd wowmesuements include llcom37onents between
O and3OO cycles usîng ân RM3mete clibated to ed thepeak value o
constanapliude sinewve l3ter.
.ì,A YTM' irTI-T AT l0- l/I'3 .'L3 (2, DO feet of pe3
0eed lTrack ullTc
3-3/''hrs, l min, 2hrs. ^ -min.
7-l/2''2 hrs. 8 min,min.
l5Ib4 min 3 min
STARTGTI3": Istanneous(ape acceleraes to ullspeed in lessthn
l/lOsecond. )
T.R?G TIV: 5.hen playing at the. l5 inches ersecond speed, the tpe
movesless hn wo inches afe pessing_ the ''-top'' bton.
_LAY%AvK T'IG -CURACY: + 2n or + 3, secondsin a thiry minute
ecoding.
RE3DT3lnlJ; ppoximtely one minute or he ul 2,OO footART reel.
OTRO:The pe motion is co.ntolled by our pushbuons: Strt, top,
s Fowad,and Reind. seae \ecodbutton enegies he ecord
cicuitswhih will dop out when the machine is s'topped. The tpe 5peed is
chngdb'y a oor peed 3Cwitch, An quli2ation wih hanges he p-
liierequali2aion aporiaely for the vaioustae speeds. A eel Qie
swichrovides proper ae tension for eihe he AR l0-l/Z inchreel
or he lA 5inch and 7 inch reels,
l-235o z/.5/53
__________ / l
R0RDI UT: & swichllows the recorder to accomodae eihr mico-
_honelevel low impedance inpuo to bridge OO ohm + q VU line, balanced
or unbalnced. inus ßO dbm a the micophone input will produce therecom-
mendedecod level. ''
AK0TUT; Plus 4 VU outputino bOO ohmsbalanced o unbalanced
Villeed high imednce ampliiediecly with approimately one volt
RUG-IynAD GUG, ;, he e5e,ecopd, ndplaybach hgds e con-
tainedin a single plug-in head hosing,
MOYITOR:Independent ecord and playbcX sysems allow the tae to be
m_onitoedwhile eording. Aphone jach is povidedto monio eiher the
recodinpu signalbefoe orduring recoring, or the oupu signal fom h
playbackhead whilerecor ding o duringplaybach An A-B switch is incop-
oraedin od that direccomparison can bemade beween he oigínal o
gam andhe ecorded pogm. Thesme switch rnsfesa ínch VU
metefo level comrisonnd monitoing. TheVU meteis lso used to
ed bisand erase curent.
'!'' RURMßlT: The half andull tackmachines equie 2, 7 amperes
at ll5 vols A, achines arevailable oreithe 50o 'Ocycle opeation.
Ii33A YD -V T:
RachMlounted:
3ndad l inch wide panel wih commercial noching,)
TapeTanso: l-3/inches ofach sace, weight 5O lbs.
ßlectonicAssembly: 1 inches of ach space, weightl8 lbs.
owe 5upply: 3-l/2inches o ach space, weight 0 lbs.
C onsole: .
eigh 4^'' (mimum)
Deph.2 l/'' (maimum)
ì,idth. Z4- l /2' '
ieigh€- l pounds
35O -0/l/53 l-3
_eht
wa s.e :",ole
TpeTranspo se
-Jeighm. CJ/''
,ll
--.,ri'dh2-/-"
eigh^L5 -,!?o4-nds
Eleconic.sserly G07 ..3oweCu,3l/ '' a5e
(wih.e a ?,ace o mie. o ca'le 5 ae)
33eig3t 1''
eh 3''
:idhm.. 23l
.',rej2h- (less re)-2 ounds
',,
fmh m _ r l t t t r tt t r r yHm
I^T. _TIO.
lMUTI' T'i R' CT30
30 TP T:
Befoeope. ati'ng the ecode, ea-. .the f.ollo. win se.G.tions on 3T A -
A T3Ya nd j-;'. I.0 ,. . .3,
'-îAU T 3^ Y:
onot atemt o lenghen he head cables,_, Addji0ncal cable caci
willaffect the equency chaacteisics, . ,-.;,.
Pú' onole N(odels: abinet nd comonens ae.ac. gds.e,paely Psernbl
- hdwe isovided Assemble s foll0ws: ('l3ns. a.ll Tn e Tan5or i
cabinetfame an_d secue wiXh0 oval. head scews n?. inishin' washes
(3 3n5e sing5 in holes in eleconics fameo cabinet(3 3 3nsall i lec
tonicAssembly comleting equied lugin connections beween i nd he
ta etans_ o, Use fou Xnurlednus o secue a. sembly to_ cbine ()e
rnovebac anel o cabinead insall '^ower uplyo_ n sma,.l. l shel f a^L ear
''-ecurewith wo oundmhead screws 'lug 0wer uply Cable int,oeconîc
Asembly(5) lug inut, ouu, and AC ower cbls into e- o lectonic
Assemblyand relae 'ack anel of cabinet so\hat al cables run freely hough
hsemi. -ciula cu in its 3ower edge 3GTATT; he back o thecon
soo,.,,..le cabine mt be spaced a leas '' om he wall o emi pron e vnilio
B woCase o3able Modes; Te otablemachine isshied in _ edy o
0eae C0diiOneVCep O he COneCiOn OinerconneCi6 Gbles
loopeate the eode lacehe echanica.?.Assembly se o he ight
othe lectonic ?_ semby Cse. Unlach n emove he op cove an open he
cableaccess dao on the lef 5ide o th?. echa_nical Assembly ase. .Unlachand
e-movethe removethe font andea coveson the "3lectroni'c A.ssembly se.
Uncoilthe inerconnecing cables om behind he cable access dooand
plug hemno maing reeptacles a he rea o Xh,ei cronic ssembly.
onnech?. i.npu, ouu, a_nd Av powe ^o the rear o he ;-lecronjc
Assem.bly
35o2/35/3 23
__3 tt t lt t t tt t t t t t 9t
C RaGkoun ì...jogls a Mo4n mahie houldbe r,4na o a
tanddl jnh ely rak wjh=h'e' 'i,te'chania3 ;.embly above the rnaj
1eonìRanel. he i Jeconi .3weruly 'ael should be munted
diectlyabove he e hanic'al'---'-6''emy' .oliiae e possiility of 5O
ycle fieldom enavring ehe lectonjc .sse.mbly
tw3/iodel a_ 5 eoders are o beounted on a andard rac
thefollowin .lae3en ísrecommende (tarin' a he top o the rach):
'+1='''' Install''a -sp'ac-erpa'nìl='"at e 'top of the'r'a ì des- ired!
2Isll .belo thi anel the.i,Jechanical s'semly' ' fo
mahine#1
3. nsallhe lecnic Assembly o mahine #3
,Install pace pnel
5:-In- a' ll he ec' h'nical',-ssembly- or 'machine#2. '
6. Insallthe lectroni Assemblyor ma-hine' #5.
7Install acer pane3
.' '' nstallbot3 -owe upply' Panels a he bottom, ' '-'. ' -
(h cable onthe power s4-pply or the uppe re-code-- '
willhave o be extended' j' nlength ' xenioncle
#'383 isavailale- for is purpose) ' ''
he nu'rnber3e' f in pare-neee ' 3n h- ollowin.,,tex ae eeor-
e-nenum'bers a fer to the art -i'-' ieeion o^) and 3e i, e in te
ea ofhis boo, ' ' ' ' ''
2.2&C G,N:
Connect'the owerable Calog' - '213, o- the AC Poawer 3nuX
Connetor(4R) on he leonics Assemly o a soue .of 3l Volt .
power:' - ' ' '' ' ' - - ' '
A:is ahne i available for either O 0r6G cyc3eopeaion.
e pover1ina- -e3ue'ncy i in3icate on e eria1 nu.mbe 'pa ic3is lo
aX-ed on theower ^up' ply. anel or rac' moun't machì'-ne, n'' te exter'io o
eah ca-e in eoable ac13ine's, and on -3e. 'ao he onole cbine. '
23 _UTUT: eer to Figrel or 2 ,
_r~_tuMdìoine:
.Plus -VU; 6O Dh' ' liae output3 'al'cDud o nbalned,i am
vailableacross Teminas 2 and 3 oR e . ine ^L Connector, (J} Pin
is thechasi gro4nd 3 un!Janed ou uj d2ird,tie eiher ide of the
z-25 /3/55
m
lineo ound. s necessay to upply O oh ermination to&i o\put
at allime in order to maintain correct meter cai.bration while rcodng
or playing bck,erefore, ifhe output is not feeding terinedine,
or if theoutpu is not connected 4h s .on remote pickups,th 3ne C4
Termintionw3ch, (4. ) mut e swi€ched to O.
B.ForC.onn__e4tion__o _3h_. _Dedan_ce4mli_ie_,. T,n43;.n
on.neGt pjn 3he in_e ut Gonneo, (JO4P),to he hi
sideof the amD1ifier input. 5tap pins l and 2o3 theconnecor and onec
tte groaund side o- 3 th ampliier inp4t. Th ine Out ermînation wih
(),ut be le in the pojtion designaed O at all time as explained
inabove.
5_U; Refe to igure l or 2 nd 6
e t'ollowingipues are pr0vded.
&.ic o ho ne _s:
nylw impedane micoph-' one, the nominal impdance 0f hich
is inthe range0f to 5O ohms an e p1uged in direly, onnec€ the
mirophaneto pins 2 an 3 of he nput Conne t, JO1), Connetable
hildto pin l. Rlae the np4t Tansf3witch, (æ1) o the 3MIpoiio3,
e microrophoneinput tansfome is sapped for ee optimu
tepup for a l5 to 55O ohm source n the cae o mirophan having 5
ohm orle ipedance, d additíonal ,ain can e obained by straping
theinpu a shown in ire 5, i ìs nt u4al1y ne0essary hoever,
andshould no be done unle insuiient ain i fo4ndto exis shoauldthe in
putbe d from aoure impedance greater han 5 ohms, JT.
R2&nd O3 wjl have to e hangedo 2 oms and &l ad &q O to 8, :
ohms ominain a flat3sponse''on &lanced riding whene tranoer i
strapedfor 5 ohm source impedane
ighimpedane mirophonesr not reommended or use in hi e
uipmen,In general, the qualiy obainle from high imped8nce mjcrophones
is n0satisatoy profesional wrh. nth event h it become neem
sayto conne ahigh ipeda.ne mcrophone, he inpu cicuit willhav to be
rem4iredas hown in ire 5.
^4 ri d in g a 4 , 0 a3 amn ce d u t d_îo4i n :
onneta alaned lineto pin and 3 o the Inpu Conneor(J1æ,
Pin1 is grund, lace ee np4t anferith, (^1g, in he BAC
6om /11/5 5m
32tput c0nne0r (o3g) pln 3 s te R3ro4nd slde pl&ce he nu ranemrm
RD'po3ition nput 1evelo minus l0 to plus 1O VU cn be accom-mo
dted Te load. plaedon the ine i approxime1y 0, ohm
or bidging hìgheo lowe levelline, &n Gxterna1 bri de cae
wiedi.n he 1îne o the mchie. is o4ld c0nsitwo eitors,t e
age inseries ih e4hside the line5 h- 5 o re3 istor s -ou 1 d er
minteeaGh 1eg o he ou ide of te two bridginreist0rs T e 34nc i0n
odhe o 2oh3m,ses,is,o .shouh3d o :o h i, nound,
ecordermay beonnecd 3o anyimped0ance fom 50 25 hm.
C.M ri d_n m aMn Umnb a_l amn c e_d _ ou _e:
0nnean unbaned 1ine,radio tunere o pins1 an d o f t he
~w'ith(41), in he UMAM 0posi3on is onect ion o
videsa O, OO ohm bridgig inputfor any \.,.proram voltge geaer t han
3/2vo3t, To inrease the inpt impedance aove , Oohm, ser ies es is
aceof 30, 0O o3m an be ied jno he inpu lug in eies wi h pKn 3
nde inputcabl. is ill neesi€atean inp4tvoltae of at lest 2- 3 / a
voltS, 3s imorant that hisesito b pyîally plaed in X e a b le
onne€oha plugs ino the RecodeInput (0l) in oder hatthe ca le
apcitybe on the np4t æide of the esisto.
5_M
nyeniive head ph0ne n be plgged in he hone 3aGk (03 '),
pavidedfor monîoring the incoming lineor laybacX o4tput
2_,_0T, COY0L: Refe, oFie 1,
e operation oe Tape rasport mechani a be emoe-on
olledhou e uee o an mpex Caia1o #57 or 563-1 emoe Control
'UnitTe atalo#6763 unit is suplied ina oden ase nd is c3 3!2e ly
wied,eady to plug into te emoe ntrl Conneo, (J5O2) o the
fronto the Tape Tasporti ui Assemby, The a€alog #573m3 unt
imounted on a latplate or insllation inudio consoles, and i not wire d
Toinall wire as shownin Fie 15, and plu into J62.
G:eneve te Remote Coroluni' is no onced t he ! ummp
lug(R5OP3, upplied withhe mahine mu be p lu,Je3ed
inoJO2.
am3 - 5 0 - / 1 /
____0rqhLt_r >t y o | _rtw0ttct> t r J0 t tem
2.7' O'u7.i'A_!,,'r?I l\:' ' (^ior D.rive .0o awe3
vn_,?. / ? '' Jv3o l,læ
''-eedoc3 qu_imen cn e lu'ed j_-ndie_^ly at J5O.!?- . TiTo e.r cOnm
-neceionsre ecessay. f ei'ner of hese uni'Gs i5used wit3 he ecAJe,
he 'ontrol icu'ís?use_''- =n3us'be'-in'c,--e-sed'oD .mpees o no
_ernovethe -''u---m- y Rli36'-' ? 5O3^unless o'ne' oh'se uni'L-s js'o e co-Lected
2. ' ! 'S'TG ' ')3- A3IYi
-''.îATJ:ee o enin he console or ;3orle cases
jsconecú ,!ove, '- , .- -' -- -
!"0m;leL.?.e c. ce-?.'-siiliy fo ìn5pec-ion or ser-vice' is,!3ovide'd- 'co 'L3e
'Lop andbo'eo0m ''''o ^he leconic A5sembly -nd o-om oJL-he ec3Janical
ssembly.u~- ee ' ieure 6o an ill-usraion o he'í- on5oleabine oD_e-1ed
or ullacces-ibili-ty. -' -
enin roedr:
l,-e-ove le o c nus..-ec-uin'Lhe'i:lecto'n-jc ssem'bly o '3e
wiabie. ' ' ^ ' - ' -' ' ' '- '' ''-''
,.ull he !'ic''onic -' i Ass'em-.ly^u-!? uti-l 3e' -í'!n-nes 're-ree o'he
sls,e-in' 5ei'- he i'unne''i' ''in he sho les i' edi- ely' j- íro-J-
Q hetvo lowe sus, '
3. emovehe o se-t scws olding the chssis oor m le. r Jne
boon9 lae hinges se?ar-e a herea i i j de ied - a reive
cl1e -laecomleely.
- ler.ame on'hich e -'ec1Jancl'ssemJ3ly s nouee can
aiS,,''-'-?:.^,'g...î,90' eo, -ees or more, nd 'held in -ac'! by a 5lide l on '-3e
lower^'5"1=i,mnde'rside oí 1e --'rarne, '
5, TheJ. o-e u~-3ply i5accesi'le hu,?h t'ne rear o 'ne cons0le
he heslidine panel js enove.
Zf A;'v'''m Uyl!-I'D='-'i l/J'i=*JAy3 AC lR,.7"' ITi T"-;:,,.,
'Aì-i 'D. 3TA^^i ' ' - -'' -' ' ' '
ndechanical ssemly ' se n end s sh_ own in ' ig.e l,
eleasehe latches holdin 3Je ce' ' visions o cas'e, en ''o app-xi
r,atelyoo, c- ,e 3u' e en to nsJ_ ht ce5 c, ,ns 3,,o'u 3, cbl'g'
com-Lîamenin'tô'! ' h maié ca0bLne '!L- eey ;,'-'' '
Z G' V' AL' -0'u'i '3i! .r: (ned eion 3 on i- !; .mT'T
b_eoema\ing -these clecs. ) -' '
5ì2/l5/53 m
.'
- - -'-'--€-''.m+.c'?
_'c - :-;--'-:-'''-"'''''-'u,
_ahehmeesponmsmecmhecapmpoxm agely tlo b be lotw oe
he fol.loingpocedue is rec. mmended o cheching he peformnc
othis recorde gime oinsXllaion and a5 necessaryheeafter
A.vell equeny Resgonse;
^lhe. ad a n.ev''a.eel of ageon_. -he_ ma'ch. ine,,' quli2aion
cuvesfo he Recod'--nd. -P. laybac Amplifie s_ ae'sh4wn. in -igure 6
and7. 6 ntiely stisfacoy resu1ts can be obtained from ny roessionl
ality tape.
l,3-3/ and 7-/2 Inch Response
D T0 TH_yATu TI.3- A5T IYTI
ß03UIT, TA. A. TURATIO iiILL0CCUR AT
TH.T3G3 Rß.. ,Um 5 U.. TH RESP0S '''ußC3
35JAD AT A,T 2O D BßLOì.r 0AJ 0. FATI
LV',
Therefore,ch, ec the response with a sensiive mee such
s. aHewle_t-ard -0OGconne.c.ted tothe ouput Tn
absenceof a sensitive meter, a sndard VU lJeer pe-
ceedby a lt mplifier wiXh at leas 2O dbgain ca_n be use
esponsewil.l be wihin the limits inicated. in the -eciica-
'tions,
.l5 3n31 esonse
',
iJ levelo avoid sauraioneffects. Responsewill be within
he limitsindicated inthe Specii.cations,
- veall YoiseJesure.ents;
Ovealwide bnd noise should be measured wih a VacuumTube
Voltm'etesuch as ewlet-- clar -00' while playingbach e ha' hs
peviouslybeen er5ed on he machine,
'is'ci Erase the e wi1 the inpu.t o he -ßecord. Amlifie shot.ed,
Rewindand ply his . .e bah. erformanc e should -fall within thelimits
seciiedunde 3~ICA-T-YIEAT. 30 in ec''ion 3. Qattem should
be mdeo measue wide band oise whìle 5imulaneously ecoring nd
,layin bacli a5 lealage othe 1OO cbias into he plybch head my ine-
ee withhe measuremen. -'
2-635o - b//53
tf t
C,Disoion;
Overalldisoìon can be measued by connecting any sanard
distortionmeasuremen appatus acros5 he oupu The redings om a
waveanly2er or se.lc€ive fequeny disoin meXer wil,lbe ore accurae
than hosefom a nl3 e instrumen a 1owerdistortion level, istorion
readingse somewh dep0endent on ape. A eading o0 l%oìs nrmal
oerXinglevl whi3e eading o 3%o is nrma3 t db abov opeing .1evel
D Ruteand, ow
? lend ow e produced by peiodicireguliies in
tape speednd pper scyclic 3equency deviions in ecodîng o re-
roduction.They cn be mesued by means 0ny stndd luebidge,
Variaionsin mp1itudeas indicaed on level measuements do no constiute
fluterand are entirelydue to tae oing vaiaXions. Readingswil3 be well
une2%o at 35 inch, 25%o7 l/2 inch, and. 3%o a 3-3/ inchspeed.
Rormore inormation on alignmen o peormnce cheching
eferto ecion 5.
35om /l/53 2.
_n_trt _ttl+ tt l_ t lr 4 tt _ lt t| l>
5'GTI3
- PEATIGRCS' DU
3. lR'! 3Z AYD, REu XYB:
The0del 5O is equipped to h'ndleeith''er the YARTB lOml/2''
reelof tape or thesm' leRMA -5" nd 7'' -''si2es' The Ree-lSie Swîtch '
(5O4)djusts tpe tension 'ppiopritely'fo the rel size used On ' console
or portablemchins; psiion he sall. reels onthe untable engaging
theturntble keys For thelarge lO-l/2'' reels, 4se the ßditing nobs
(ctalog#l9 l7) tht havebeen provided. Rck mountmchines re supplie
wi'thHold-Down Knobs (catlog 02) for bothsmll ndlrge reels '
T :.'' Alwy's use r-eels- of th- s'm' s i-2e 'ón both turntbles
O.-p, rtio,_ n'' with one ' lrge n' d one small reel my'reslt
inaulty -br-hing action ' '- -'
TheYO2 reel hold-downhnob (Fig4re O) worhs in the ollowing
mnner.A removble pin in the bottom surace o the hnob eng.ges
coespondinghole !n the turntbleA collet grips the turntblesh_ft when
he topof the knob i.. srotated. Two springmloadedblls hold the reelto the
turntble.A pin in t''heside of theknob drives the reel, 'The hnob sho' 4ld be
positionedon th!e YARTB reels s' tht the remova- ble p'in engge one of the
.turntableholes+and approx- imately two thirdsof the ball is- exposed abavethe
reelhe knob shouldnot be pushed down llthe way, but sho4ldri'de bove
theturntable Once the knobis posiioned correctly, the YATB reels may
be roved withoutremoving the hnobsYhen usingthe nob with the mll
R reeLs,ucrew theremovable pin. Thehnob is4sed only to prevent the
reelfom falling off the' turtble, sinc'ë' three heys in' the trntbledrive nd
cene thereel L-- oc thehnob tothe sht avoiding exces's pressureon the
reel whi.ch could d istortthe re.. el langes
3. 2TAP THRADIG. '
Thredthe tape sindite .in igure ll A'll new. fct0r.y wound
reelsshould 'be unwoun. d and inspecte:d b-y running throu!gh't Fs Forwrd
beforeus ing them in the play mod'e o opertion, Yew t' pes re 4su' lly looped
tothe hub in such a manner that' he tape will ot come ree of the reel a the
en Thiswill preventthe Sfety Swich (5Ol) rom disenggig the.pstan
Idler rom the p-st-n whichresults in"'lt beingwo'rn on the Capstan Idler
'heel (An- y dhesiv'emteril accmul'ation onhè reel'hub may lsokeep
thet,pe rom coming eethe end of the reel, nd shouldtherefore be re-
movedwith solvet,)
35o- 32/r5/533-
_____ m t _
3. 3mLF TAGK OPEATIOY..
Thehandling of hal ac tapes on his machine isaccomplishe
i'n thefl,lowing manne. Theape is threaded and opeaed as escribed
undeTAPE THEAIG and TAPE MOTTOY,Howeve, only he upper
ha.lfof the pe wil be used on the hf tac.k machineTo uilie the lowe
ha3f o he ape, Xhe u.l3 eelon theTaheup Turnble shouldbe emo.ved
tunedove n p1ced on the Tape Supply Tu.nable upside downPlace
an empyeel on Xhe. TaXeup Tuntable, Repea he opeation as peomd
onthe ir Xach
3PO .i--ER:
Poweris. supplied Xhrough Powe. with (SO6), which mustbe
turnedon a .opea.te the Eectronic and Mechanica.lAssemblies The
MechanicalAssem'C bly and lectonic Assemby areindividul3y fused by
the3 amere ontrol Gicuit use (4O2)- and he l ampee lectonic
? use (R4O1),-
3, 5SR 5n!'THE.
Theeae wo switche associated with opeting speed, The Tape
5peedwih (35O3) deemìnes the speed o the caps andive moo',and
theEquliaion wich ( S40Z) changes he equi2ationin theamplifies
appr o p iaXe ly.
3, .,. .TA oTo;
Thetape motion is conoI,ledby means of fou pushbuXonslabel3ed
ewindFast oward, op and lay.
.l,Play or Record: The tape is set into Play motion a Xhe
speedseIeced by he TapeSpeed wich when he Play
Buton(S5O5) is depessed, The tape mst be comp3etely'
oppe,d beoe s. atingin his mode. To change fromlay
modeto the Record mode with the Xape in motion, pess the
ecod BuXon(S4O3) on the lectyonic Assembly.
2_ t op: To sop Xhe pe whileit is moving in any mode,
pess theSop Buon (S5O. 2), The machine wil,lsop
-utomaticalyi the -tape sould bea o. unof either reel.
.3-2 35o -2/5/
3_0t _l___ 3l 3G A y uE3y0 T tT 0 0 _ t
3- sRoad :. T he \/3odel5O can es ed in 5'
orwardo.sichd oias ord?om any o the
o. peinge9 by_simly deressing the-- st t- orward -
buton(3- 5O'b) '
.Rewind: The- Nodel 350._ cn be saed in ewind o 5witched
oewind am' y '0a the ope-.ing mades by -simly depess-
ingthe ewind buon (507),. ' -- --
lC';i: n us ing. e,ithe the asX od .o R. evindmode, i is
d_esibDle ,,o em0ve the; tape fom dicec c0. ntc. with he heds
byopening Xhegae o he T3ead Assembly, This' will educe
wearon th?. heads andpreven he ociJe cotîng on he ^cape rorJ
de0osi_i._g-.on .he ,head?. a'nd irn_.irjng the_ i e- once,
mii,r , ;
3nd_ein he e s inediing or cueingor wh_enapp-oaching he end
othe el, i5 simpliied by holdin don a combDinati_on of buttons. Te
moi0ncan be 'reduce. d oslow .creeby hold_ing down h a5 orvad aa
windbutons siultaneously, and then alernatin beween thetwo oconm
ro3ae. direct3on, ''hen thedesied poin is ech,, 'he:',~to,? button should
be heldd0wn nil he o3h'er butns are _ ele_ ased, .
UTIOY: ever press the 3to-p ad P3y buttons in raid sequence vhen
he peis raveling hihs, eedin he ewind o storwad mode5.
Thiwill almos invaiably breakthe e since iX does no lov suicien
time ohe -pe to stobefore he -sn Idle loch3G i to he v, tn,
3. 7AYßAlT.
-Toplay baclc previouly 3?ecoded tape, tun 'e -eer and ui-
D ut 3wiXh(Q40), o the extreme left n, osition desioned P.V3AC-i V.
Thens the ae in motion s inJicaed unde AV. layac3 evel
'onol (^)hs een ovided on heronX anel to adjus't lJe a, e level
toplus VU outu,(Zero on le VUmeer. )
3, RG0RD:
Toecor a new rogam one.viously recoded ta?e, o on blan1
tae turn the leer nd utpu~witc (3053 o hesecond osiion 3rom
thele which is designed P\'0D- V , urn the Recod Level 'on
tol(ßO9) clochwise untilthe levelreds O (2eo3 on ee VU Je on he
mo5 inense roam eahs. The , roam cn be audib1y moniXoed
t1oh eithehe Phone Jck (J-033, heine 0utConnecto (3O.)
5o2/5/53 3ì
Other manuals for 350
1
Other Ampex Tape Deck manuals
