1-2
General
Information
Model
280B
Table 1-1. MODELS
OF
280B
SERIES
RECORDER/REPRODUCER
MODEL
NUMBER
DESCRIPTION
TAPE WIDTH
(INCH)
280B-FT
One-Channel, Full-Track (Mono) 0.25
280B-l
One-Channel, Two-Track (Half-Track Mono)
0.25
280B-2 Two-Channel,
Two-Track
(Stereo)
0.25
280B-4 Four-Channel, Four-Track (Quad)
0.50
280B-24 Two-Channel, Four-Track (Quarter-Track
Stereo)
0.25
280B-44
Four-Channel,
Four-Track
(Quad)
0.25
Table 1-2. SPECIFICATIONS
Frequency
Response Using
3M
206
tape,
or
equivalent:
in/s
cm/s
Frequency
Response
30.00
76.2
±2
dB
at
50
Hz
to
20
kHz
15.00
38.10
±2
dB
at
30
Hz
to
18
kHz
7.50
19.05
±2
dB
at
30
Hz
to
15
kHz
3.75
9.52
±2
dB
at
30
Hz
to
10
kHz
Signal-to-N oise
Ratio
Using 3M
206
tape,
or
equivalent,
at
peak
record
level
of
500
nWb/m,
with
weighted noise
and
equalization:
Full Half Two
Four Four
in/s
Track
Track
Track
Track
Track
0.25"
0.25"
0.25"
0.50"
0.25/1
30.00
72 dB
68
dB
68
dB
68
dB
65
dB
15.00
72 dB
68
dB
68
dB
68
dB
65
dB
7.50
72
dB
68
dB 68 dB
68
dB
65
dB
3.75
68
dB
64
dB
64
dB
64
dB
61 dB
Flutter
and
Wow
Weighted
peak
flutter
(ANSI
S4.3,
1972;
lEC
386,
1972)
in/s
DC Servo
AC
Motor
30.00
0.04%
15.00
0.04%
0.08%
7.50
0.05%
0.10%
3.75
0.10%
0.20%
To Next Page
Loading...
General