TECHNICAL
DATA
Track
System
.......
4-track 2-channel
stereo/monaural
system
Reel
Capacity
..
.
....
Up to
7"
reel
Tape
Speed
.........
7-1/2 and 3-3/4 ips (±0.5%)
Wow
&
Flutter
......
Less
than
0.08% RMS
at
7-1/2 ips
Less
than
0.12% RMS at 3-3/4 ips
Equalization
........
Correct
equalization
for
playback
of
tapes
recorded
to
NAB curve.
Frequency
Response . 20 Hz
to
25,000
Hz (±3 dB)
at
7-1/2 ips (Akai
SRT
Tape),
30
Hz
to
20,000
Hz (±3 dB) at
3-3/4
ips
(Akai
SRT
Tape),
30
Hz
to
23,000
Hz (±3 dB)
at
7-1 /2 ips
(Regular
Tape),
30 Hz
to
19,000
Hz
(±3 dB) at
3-3/4
ips (Regular
Tape)
Distortion
......
.. ..
0.8%
(1,000
Hz
"0"
VU)
with Akai
SRT
Tape
Signal to Noise
Ratio
. 63
dB
with
Dolby process
(Using Akai
SRT
Tape)
55 dB
without
Dolby
process
(Using Akai
SRT
Tape)
Erase
Ratio
.........
Better
than
70
dB
Cross-Talk
.........
Better
than
70
dB
(monaural)
Better
than
50
dB
(stereo)
Bias
Frequency
......
100
kHz
Heads
.......
..
....
(3) : 4-track
stereo/monaural
Glass
& Crystal ferrite recording and
playback
heads;
4-track
erase
head.
Motors
..........
_ . (3) :
Outer-rotor
2-speed
motor
with
servo-control circuit
for
direct
SOUND MIXING
Another
important
feature
of
this
model
is
the
built-in
microphone-line mixing circuit.
Independent
line
and
microphone
recording level
controls
and
input
jacks
enable
signais from
microphone
and
signais from
other
sources
to
be
blended
and
recorded
simultaneously
on
the
tape
.
For
mixing line and
microphone
signaIs, follow Recording
Using Microphones
procedure
substituting
the
following
steps for steps E
and
G.
E.
Connect
microphones
to
Microphone
Jacks and
connect
the
line
outputs
of
external
source
to
the
Line
Input
Jacks.
G.
Adjust
microphone
volume level
with
Microphone
Recording Level
Controls
and line
input
level
with
Line
Recording
Level
Controls.
• Mixing
can
also
be
effected
by
using
the
Din
Jack
and
Line
Input
connections
si
multaneou
sly. In
this
case
, Din
Jack
in
put
is
controlled
with
Microphone
Recording
Level
Con
troIs.
•
For
playbac
k, o
perate
Track
Selector
Button
according
to
tracks
used
in
making
recordings.
capstan drive ;
two
6-pole eddy
cur
rent
outer-rotor
moto
rs
for
supply
and take-up reel drive
Fast
Forward
&
Rewind
Time
.....
60/75
sec. using a 1200 ft. tape
at
60/5
0
Hz
Recording
Capacity
..
2
hours
stereo
recording using
a
1200
ft.
tape at 3-
3/4
ipso
Output
Jacks
. .
.....
Line
(2):
0.775
V ("
0"
VU)/1
00
r2
Required load impedance :
more
than
20
kr2
Phone
(1):
30 to
40
/8
r2
Input
Jack
. .
.......
Mi
c
rophone
(2):
0.8
mV/IO
kn
Line
(2):
150mV
jl50kn
Din
Jack
...
..
.
.....
0.4 V
/5
0
mV
(High)/2 mV
(Low),
68
kn
Semi-Conductors
....
Transistors:
75
(PET
4)
Diodes:
55
Power
Requirements
. 100 V to 240 V A.C.,
50/60
Hz
Power
Consumption
. .
90
W
Dimensions
.........
435 (W) x
460(H)
x
26
0(0)
mm
(17 .1 x 18.1 x 10.2
")
Weight
...
..
.
......
22 kg
(48.4
lbs)
* For
improv
ement purpos
es,
specifications and
design
are
subject
to change withou t notice.
* Dolby
is
a trade mark of Dolby Laboratories,
Inc
.
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