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l.
2. Remove
lid from camying
case.
Remove microphone and AC supply
cord from
storage compartment on left
side
of canying
0n-0ff Switch
On the
Model g0,
t}is is a 2-position
switch.
When it
is in the On position,
power
is turned on to
the amplifier
and tape deck.
On the Models g0-S
and
90-C, it is
a 3-position
switch.
When the switch
is
pushed to the
AII On position,
power
is turned on to
the amplifier and tape
deck.
When it
is in
the Amp Off
position, power
is applied to the
tape deck only. The
Off position
turns the power
off to the entire unit.
Vol ume
Turning this control
clockwise increases the
volume in
either record
or playback.
Turning it
counterclockwise decreases the volume in either re-
cord or playback.
Tone This control
firnctions inplayback
only. Turning
it clockwise
from position
5 will
increase
the treble
response; turning it counterclockwise
from position
b
will attenuate
tie response.
Play-Record and Record Lock
This is
a 3-position
control: Stop, play,
and
OPERAT ING
Threading the Tape
l. Place
a full reel
of tape on feed reel
spindle
(6?), making certain the reel
slots engage the
protrusions on the pan. place
an empty reel
on take-up spindle (2?),
again making
certain
the slots engage
the protrusions
on thJpan.
2. Unwind
about 14 inches
of tape
from
the supply
reel. Hold a section
of tape taut and insert
into
the tape slot,
making sure the dull-coated side
faces the rear
of the recorder.
3. Insertthe
freeendof thetape intooneofthe
slots
inthe hub of the take-up reel.
While holding the
end in place,
turn the reel
two orthree
times to
secure t}te tape to the reel.
To Make a
Monaural Recording
I. P-lug
a microphone into the Microphone jack,
or
place a signal
from some
other sburce
into t}re
Line Input jack.
2. Depress
the Record Lock
and simultaneously
turn the Play-Record
control to ttre Record po_
sition.
3. Adjust
the Volume control
until the
average
reading on the VU meter
is
-b.
Page 2 P
REPAR ING
FO R O PERAT
ION
case.
3. Make certain
all
tion- controls
are in
the Stop posi-
FUNCTIONS OF CONTROLS
Record. Turning this control
clockwise from the Stop
position places
the unit in ptay.
Depressing
the Record
Lock and turning
the control to the Record position
at
the same time, places
the unit in Record.
NOTE: This control
is interlocked
with the Wind-
Rewind control. It must
be in
the Stop position
bef ore
ttte Wind
-Rewind c ontrol
can be op e rated.
Wind-Rewind
Turning this controlto
the left places
tlreunit in
ttte Wind position;
to the right,
in the Rewind position.
NOTE: This
control is interlocked
with the play-
Record control. It must
be in
the Stop position
before the play-Record
control can be operated.
Pause When this
lever is raised, pressure
is removed
from the drive
capstan,
and the
take-up reel
is dis_
engaged. This permits
spot editing
and momentary
stops.
NOTE: This
control
is not
on the
Model g0.
INSTRUCTIONS CAUTION: Do
not
connect
a speaker
or other low-
impedance load to the Output jack
while making
a recording.
To Make a
Stereo Recording
l. Connect the interconnecting
cable from
the
Channel-2 head jack
to the
stereo
channel inthe
Model 4-901
amplifier.
2. Move the
On-Off switch on the tape recorder
to
AII On.
Move
the On-Off
switchon
theamplifier
to On.
3. Turn the Volume
control until the
VU meter
reads -5.
4. PIug microphones
into the Microphone
Input
jacks, orplace signals from another sourceinto
t}te Line
Input jacks.
5. Depress
the Record
Lock
and simultaneously
turn the Record-play
control on the
tape trans_
port to Record.
6. PlacethePlay-Record
switchon A-g0Iamplifier
in Record.
?. On Model 90-C,
turn the switch on the built_in
preamplifier, on bottom of the case,
to Out.
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FIG.
I
TOP VIEW OF MECHANISM
WITH ESCUTCHEON
REMOVED. F
o E
tT
'ta
8g -‚¬F
our
ti' 7
-‚¬
F
It/lonaural
Playback
1. Thread
the tape (see
"Threading the Tape").
2. Turn the unit
on and allow a few seconds for
it
to warm up.
3. Turn
the Play-Record control to Play.
4. Adjustthe volume andtone to thedesired listen-
ing leveI.
Stereo Playback
l. Thread
the tape (see
"Threading the Tape").
2. Turn
the tape recorder
switch to Alt On. Turn
the A-90I amplifier switch
to In.
3. Connect
the interconnecting
cable from
the
Channel-2 jack
of the
tape recorderto
the Stereo
jack on the amplifier.
4. Make
certain the Play-Record switch on the
amplifier is in
Play.
5. Turn the Play-Record controlon
the tapetrans-
port to Play.
6. Adjust
theVolume controls onthe
tape recorder
and amplifier to
a balanced output.
Speed Change
To change
the tape from 7
V 2
to 3 3/ 4
ips, re- move
the thumbscrew
and bushing from
the capstan.
When the
bushing is
not being used, store
it on the
bushing post.
lndex Counter
After atape is
threaded onthe recorder,
set the
Index Counter to
"000". The index
numbers can then
be noted
at the beginning of each
selection, for future
reference.
External Speaker
An external speaker
may be plugged
into the
Output jack.
The internal
speakerwill
be fusconnected
when using
an external
speaker.
Erasing Tape
To erase
one track
of a tape,
turn the knob
on
top of the head
clockwise. This raises
the erase head
tothe half-track position.
To erase both tracks
at the
same time, turn the knob counterclockwise.
This
Iowersthe erase headto the full-track position.
When
the unit is
in
the Record position,
the erase head is
automatically positioned
before a new
recording
is
made. To erase
the tape without putting
a new
re-
cording on it,
turn the
volume to minimum
and the
Play-Record control to Record.
To Use
the Second
Track (ltylonaurall
l. Turn
the Play-Record
control to Stop. "n
O
I
n
u)
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