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"TAYBACK PERFORMANCE
(Refer to Fig. 10-A or Fig. 10-B)
1,
Thread
recorder
with
a standard
alignment
tape.
CAUTION:
The
standard
alignment
tape used
in the following
procedures
may be partially
erased
if the record
and
playback
heads
are
permanently
magnetized.
Demagnetize
and clean
the heads
before
proceeding.
2.
Set the MONITOR selector
switch to TAPE, and TAPE SPEED selector
switch to HIGH (7-1/2).
3.
Connect
a temporary
channel
selecting
switch,
across
the
output
jacks
of Channels
A and B, and the
output
of the
switch
to an AC
VIVM.
4.
Play 700 cycle (or 500 cycle) reference tone (10 db below normal
operating level),
adjust
OUTPUT level control
so that VIVM reads
exactly -5 db (0.44V).
Playback Head
Azimuth
5,
Play 15 ke tone and turn azimuth adjustment screw (Fig. 9) of
forward playback head until maximum meter reading is obtained.
6.
Reverse
the direction
of the tape.
7,
Turn
azimuth
adjustment
screw
(Fig.
9) of reverse
playback
head
until
maximum
meter
reading
is obtained.
Frequency
Response
8.
Play
(forward)
the
alignment
tape from 15 ke to 50 cycles.
9.
Check the frequency response
of both channels.
10.
Operate
tape reverse
switch,
and make
the
same
adjustments
as
above,
for both
reverse
channels.
= O32
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