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Ill. Installation
and
Operation
This machine can be operated in either the horizontal
or
vertical
position. In the carrying case, insrallacion consists only
of
making up
and connecting the required cables ( See "Connector" in chis secti
on).
For studio installations, an adaptor (Catal
og
No. 9684-1) is available
which permits mounting
in
a standard 19-inch relay rack.
The
power requirements are 117 volt a-c, 50 or 60 cps, 0.52 ampere,
6 l watts. A name place on the botrom
of
the case adjacent to the a per-
cure for
OUTPUT,
UNE
INPUT
and l l 7
v.
a-c indicates rhe proper
line frequency.
The
1 ine input
is
an unbalanced bridging input of l 00,000 ohms.
Any unir connected to rhe LINE
INPUT
connecror should deliver a sig-
nal
of ar least 0.5 volr when recording from consolerres, mixers or other
rape recorders.
The
recorder is wired for a high impedance microphone,
but
pro-
vision for internal mounting of an accessory plug-in transformer imme-
diately changes the machine for use with low impedance microphones.
To
make rhis conversion, remove the four screws on rhe panel
of
rhe
electronics assemb
ly
.
The
panel and assembly can then
be
removed.
A.
High
Impedance-a
dummy
plug
Jl
07P
shown on the sche-
matic diagram ( Fig. 5.3) must be plugged
int
o socket
Jl0
6S for hi
gh
impedance op-
eration.
B. Low Impedan
ce-
remove the dummy
plug
J107P. Acces-
sory transformer
AMPEX
catalog number
17331-1
(s
hown
as
Tl03
on
sch
emat
ic dia-
gram
Fig
. 5.3) is then plugged into }10
6S
for impedance in the range
of
150 ohms
co
250
ohms.
C. 30
ohm
to
50 ohm - Install transformer
Tl03
as shown
on
the
schematic diagram ( Fig. 5.3) by plug-
ging
the
transformer
into
socket ] 106, and
removing che jumper as shown
in
Nore 7
on
th
e schematic.
The
output
of
rhe machine should be connected
co
a unit having 600
ohms
input
impedance. In a situation wherein the recorder will work
into a high
im
pedance line, physically terminate the
OUTPUT
connec-
tor wirh a
600
ohm resistor and bridge this resistor
with
rhe hi
gh
im-
pedance circuit. A three circuit
OUTPUT
plug is supplied. A cwo circuit
plug can
be
used, and will work;
but
it
automatica
ll
y makes an unbal-
anced line. If
an
AMPEX amplifier loudspeaker is used
plug
it into the
MONITOR
jack only.
GENERAL
POWER
LINE INPUT
MICROPHONE
INPUT
REPRODUCE
OUTPUT
3-1
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