Scully 280B Series User Manual

Model 280B
General
Information
Table 1-2. SPECIFICATIONS (Continued)
Distortion
Head and Track
Configuration
Speed Accuracy
Standard Operating
Level (Playback Fluxivity)
Start and Stop Time
Wind Time
Reel Sizes
Inputs
Outputs
Power Requirements
Tape Widths
Tape Speeds (Two)
Motors
Brakes
Alignmen t Con troIs
500-Hz
third harmonic using 3M206 Tape or equivalent;
at peak record level (500 nWb/m), less than 3%; at stan-
dard operating level, less than 0.6%.
See Table 1-1.
±0.1%
with DC Servo; ±0.2% with AC motor throughout
reel at all speeds, using 1.5 mil tape.
3.75 and 7.50 in/s: 200 nWb/m at 1000 Hz
7.5,
15 and 30 in/s: 250 nWb/m at 1000 Hz
0.25-in
tape: at 15 in/s reaches nominal speed, ±0.1%, in
200 ms with a full supply reel. From Play tape moves less
than 1.5 inches (3.81 cm) after pressing STOP. At wind
speed, tape stops in less than 5 seconds.
Less
than 60 seconds for 2400-foot (730.5-meter) NAB
type A reel, 0.25-inch tape
To l1.5-inches (28.2 cm) (CCIR)
Floating Bridging: 10 Kilohms impedance; minimum
level, 200 mV
+24 dBm into 600 ohm Load (output impedance 60 ohms)
105 to 125 or 220 to 240 Volts, 50/60 Hz.
Power Consumption at 117 Vac: 60 Hz
223 V A for 1 & 2 Channel
328 V A for 4 Channel
0.25 and 0.50-inch
3.75 in/s and 7.5 in/s, or 7.50 in/s, 15 in/s and 30 in/s with
optional servo. Equalization switches automatically with speed.
Capstan: Direct drive hysteresis synchronous (Phase-lock
servo
optional).
Reel: Induction torque motor (2)
Dynamic plus disc
Equalization controls (2 Record, 4 Play), Bias Adjust, Record
Cal., Sync Level, Play Cal., Bias Level Set
1-3

Scully 280B Series Specifications

General

Brand	Scully
Model	280B Series
Category	Turntable
Language	English