Revox B-77 registratore a bobine Vintage ( Usato ) contagiri da controllate
Revox B-77 registratore a bobine Vintage ( Usato )
Contagiri da revisionare
Revox B77
Stereo Tape Recorder
Tape transport mechanism:
3-motor tape drive, 2 AC driven spooling motors; 1 AC driven capstan motor, electronically regulated
Tape speeds:
3.75 and 7.5 ips or 7.5 and 15 ips, electronic change-over
Tolerance from nominal:
With external accessory, speed variable:
± 0.2%
from: 2.5 ... 11 ips (3.75/7.5 ips machines)
5 ... 22 ips (7.5/15 ips machines)
Wow and flutter
(as per DIN 45507/ consistent with EEE standard 193-1971):
at 3.75 ips less than 0.1%
at 7.5 ips less than 0.08%
at 15 ips less than 0,06%
Tape slip:
Max 0.2%
Reel size:
Up to 10.5 inch diameter
(min. hub diameter 2.36 inches)
tape tension switchable (for small hub diameters)
Winding time:
Approx. 135 sec for 3600 ft of tape
Tape transport control
Integrated control logic with tape motion sensor provides for any desired transition between different operating modes. Contactless electronic switching all motors. Remote control of all functions and electronic timer operation are possible.
Equalization
(as per NAB):
3.75 ips: 90 µsec / 3180 µsec
7.5 ips: 50 µsec / 3180 µsec
15 ips: 50 µsec / 3180 µsec
Frequency response
(measured via tape, at -20 VU):
At 3.75 ips:
30 Hz ... 16 kHz +2 / -3 dB
50 Hz ... 10 kHz ± 1.5 dB
At 7.5 ips:
30 Hz ... 20 kHz +2 / -3 dB
50 Hz ... 15 kHz ± 1.5 dB
At 15 ips:
30 Hz ... 22 kHz +2 / -3 dB
50 Hz ... 18 kHz ± 1.5 dB
Peak recording level:
514 nWb/m corresponds to 6 dB above 0 VU
Level metering:
VU meter as per ASA standard with LED peak level indicators
Distortion
At 0 VU
(257 nWb/m)
At 0 VU + 6 dB
(257 nWb/m)
At 3.75 ips:
< 1%
< 2.5%
At 7.5 ips:
< 0.6%
< 1.5%
At 15 ips:
< 0.6%
> 1.5%
Signal to noise ratio
(weighted as per ASA-A, measured with tape)
Half track
At 3.75 ips better than 64 dB
at 7.5 ips better than 67 dB
at 15 ips better than 65 dB
Quarter track
At 3.75 ips better than 60 dB
at 7.5 ips better than 63 dB
Crosstalk
(1000 Hz):
Stereophonic
Monophonic
Better than 45 dB
Better than 60 dB
Erase depth:
At 7.5 ips better than 75 dB
Inputs per channel
MIC (unbalanced)
Position LO:
0.15 mV / 2.2 kOhms
for 50 ... 600 Ohms microphones
Position HI:
2.8 mV / 110 kOhms
for microphones impedances up to 20 kOhms
Radio:
2.8 mV / 20 kOhms
AUX:
40 mV / 220 kOhms
Overload margin on all inputs:
40 dB (1:100)
Outputs per channel
(level at 6 dB above 0 VU / 514 nWb/m):
OUTPUT
1.55 V, internal resistance 390 Ohms adjustable with preset control, max. attenuation -26 dB (Rj max. 1.5 kOhms)
RADIO:
1.55 V, internal resistance 4.7 kOhms adjustable with preset control, max. attenuation -26 dB
PHONES:
(2 x) max 5.6 V, internal resistance 220 Ohms, short-circuit proof, optimum matching impedance 200 ... 600 Ohms
Connectors for:
Remote control of tape transport functions
Remote control of variable tape speed
Slide projector or crossfade unit
(electronics optional)
Semi-conductor complement:
11 IC, 1 opto-coupler, 4 Triac, 60 transistors, 33 diodes, 5 LED, 2 full wave rectifiers, 3 relays
Electric current supply
(voltage sector):
100,120,140,200, 220,240 V
50 ... 60 Hz, max 80 W
Main fuse:
100 ... 140 V: 1 A slow-blowing
200 ... 240 V: 0,5 A slow-blowing
Weight:
Approx. 37 lbs. 7 ozs (17 kg)
Dimensions (W x H x D):
17.8 x 16.3 x 8.14 inches
(452 x 414 x 207 mm )
Required clearance for 10.5 inch reels:
Max width: 21.2 inches (538mm)
Max height: 18.25 inches (463.5 mm)
All figures quoted are minimum performance values normally exceeded by all units. Subject to change.
