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sruDER nÄ/ox
c?78
1t
F=:*.=.=*J-Fp"SNJ,sßL==$.r*PF=$.g=tr=.-
The C278 tape
recorder
requires
no regular
maintenance
other than occasional cleaning of the
capstan =ha4t, the pinch roller. the
sor-rndheads,
and
the tape guide=, and demagnetization o+ all
metal
parts that
come
in trontect r+ith the tape.
For this purFose we
reco,nmend
the
FEVOX
cleaning
kit (part Ns'
10.04?.O02-01).
Cleaning:
l'loisteJ ä +ett gtick with cleaning fluid and
clean
all tape guidance elementg- Then dry the
cleaned
parts with a
nee.r
clean fslt
Er+äb
or cleaning
web'
Inportant:
Hal:e
seire that no cleaning {luid penetrateg into
the bearinq of the capstan sha+t becäuse thig
would
damage
the
bearings-
Demagnetizing:
Switsh o{* the tepe recsrder and move the tape
suf{iciently
{Är away frsrn the recorder'
SIswlY
move
the tip of the energiEed choke very close to
the part
to be demaqnetized and after
a brief
.no.nent
reträct
it slowly. Repeat this procedure for
Äll metäl parts that cofie in contact with the tape
{soundheads,
tape guidance elementg" guide rollers.
li{ting
pini. l{ithdraw the choke from the recorder
iapprcrli- 5O cmi
be+ore
you sr.litch it off-
Caution:
If the choke
cotnes
too closs tc the tapes. they
will be
demagnetizedl
The
track configuration of the
C27E
is
shor*n
in the
{ollowin_o
diagram:
E*qu-p*rj,-4.-ät*i-o1:l*s-..*LIF---C-,*-N-fl-*8"-1"."
Equalization networks are built into the record
and
reproduce
path
o+
the
tape
recerders
+or
correcting the frequentry
respt:nse-
The attack ptrints clf the correction circuits
are
referred to as tran5itiBn frequencies or tran=ition
time csnstants and
depend
on the tape
speed.
They
have
been
standardized
by
varioeis
organizations iIEC,
NAB'
AES' CCiFi
as iollowE:
In
the
C?7A tepe
recorderr
the
equalization
networks are plugged into
the
RECORD
trONTRAL
BOARD
L.777.7?A.O0
and the PLAY
AI{PLIFIER
BIIARD
1.777-74fr.OO.
lrlith this
desiqn it
i5 possible to
convert your recorder to dif{erent
speeds clr to
other equalization standards.
Al..!*.e_"r*ne"_te___t..B-p-e*-..9-pe-e--d*s*
The REVAX C77& tape recorderg
cän easily
be
converted to other tspe
speeds.
You r.rilt only need the correspt:ndinq plug-in
boards
for
the desired tape speeds of the
atrFlicable
eqr-ralization
ständard
(IEC
or
NAE)'
Bne
rec(]rd
Fluq-in
board
accommodateg the
equali=atian network o+ t]ne channeli one reproduce
board
äctrBmrnodÄtes
tws channels. This meang that
you need I plug-in boards {or the recsrd path
end
4 fsr the retrrodutre
path.
0,9mm
Track
1
Track
2
Track
3
Track
4
-/7O,7mm
/zO,9mm
'zO,7mm
.-
---
0.9mm
--0,9mm
--
O,7mm
-
0,9mm
-
0.7mm
--
0,9mm
--
0,7mm
l-..--
o,gmm
=--
ö:t;;
t:=0,9mm
--\-o,7mm
-0,9mm
Track
5-
Track
6-
Track
7
Track
8-
TAPE
SPEED
TRANSITION
FREOUENCY
LOI'J
AND
HI6H
(TRANS.
TII'IE
CONSTANTS}
r
Ec-
1
96El
NAB-
1
965
9.5 cm/-
3.75 ips
5D
H=; t76A
Ha
(31E}Opr=i
gülts)
5[ Hzi 1758
HE
iSlB8trs;
gBF=i
tg
Em/g
7.5 ips
5O
H=; 2737
Hz
io;
TBps)
30 H=i J183
Hz
t31E}üp=;
SBp=l
3E}
rmls
15 ips
5ü Hz: 4347
Hz
{ol f,5lrsi
50 Hzt 3lElf,
Hr
i31€BFsi
5ÜFsi
TAPE
SPEED
STAN-
DARD
PART
NO.
PLU66ED
INTO!
9
,3/
L9cn/ s
I
9/SBc
m/
s
9.5/SBcm/s
NAB
NAB
NAB
1,777.7?6.04
1,777,7?B.40
1,777.730.44
RECORD
EONTROL
BOARD
RECORD
CONTRBL
BOARD
RECORD CONTROL
BOARD
9,3/ t9cn/s
19/3Bcm/s
9.3/38cn/g
IEC
IEC
IEC
1.777
.732.trß
1,777 ,7S4.OO
1.777.736.O0
RECORD
CONTROL
BOARD
RECORD
CONTROL
BOARD
RECORD CONTROL
BOARD
i ,3/
L9cn/
g
I
9/38cm/s
9.5/sgcn/
a
NAB
NAB
NAB
1.777
.746.00
1.777,748.OO
1.777.750.4O
PLAY AMPLIFIER
BOARD
PLAY
AHPLIFIEF
BOARD
PLAY AMPLIFIER
BI]ARD
i.3/
l?cn/a
L9/38cn/s
9.5/38cm/E
IEC
IEC
IEC
1,777
.7e2,OE
1,777 .734.OO
1,777.7e6.04
PLAY AMPLIFIER
BOARD
PLAY AMPLIFIER
BOARD
PLAY
AMFLIFIER
EOARD
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