This Revox B77 is the second of a pair with moderate wear.  The Format is 1/2 Track stereo, not quarter track.   This unit has the bat handles missing from several of the front panel switches.  The switches themselves operate, but the handles are gone.   In addition the power switch is inoperable.   This deck is in Poor Cond.  Both of these B77 decks need pressure rollers.

This information is from the original Revox B77 literature:

• 3 motor tape drive; 2 AC driven spooling motors; 1 AC driven capstan motor, electronically regulated
• 3.75 ips and 7.5 ips, electronic change-over, tolerance from nominal +-0.2%
• With optional vari-speed speed variable from 2.5.....11 ips
• Wow and flutter: 3.75 ips <0.1%, at 7.5 ips <0.08%
• Up to 10.5” diameter (minimum hub diameter 2.36”)
• Tape tension switchable for small hub diameters
• Winding time: Approximately 135 seconds for 3,600 ft of tape
• Equalization: (as per NAB) 3.75 ips: 90 microsec/3180 microsec, 7.5 ips: 50 microsec/3180 microsec

• Frequency response: (at -20 VU)

  3.75 ips 30Hz-16kHz +2/-3dB, 50Hz-10kHz +-1.5dB,

  7.5 ips 30Hz-20kHz +2/-3dB, 50Hz-15kHz +-1.5dB

• Peak recording level: 514 nWb/m corresponds to 6dB above 0VU

   

Tape transport control:

Integrated control logic with tape motion sensor provides for any desired transition between different operating modes. Contactless electronic switching of all motors. Remote control of all transport functions and electronic timer operation are possible

Level metering:  VU meter as per ASA standard, with LED peak level indicators 

Distortion:

3.75 ips at 0VU <1%, at 0VU+6dB <2.5%

7.5 ips at 0VU <0.6%, at 0VU+6dB <1.5%

Signal to noise ratio: (weighted as per ASA-A)

Half track 3.75 ips >64dB, 7.5 ips >67dB

Quarter track 3.75 ips >60dB, 7.5 ips >63dB

Crosstalk:  At 1kHz stereo >45dB, mono >60dB

Erase depth:  At 7.5 ips >75dB

Inputs per channel:

MIC LO 0.15mV/2k2ohms for low impedance microphones

MIC HI 2.8mV/110kohms for high impedance microphones

RADIO 2.8mV/20kohms

AUX 40mV/220kohms

Outputs per channel: (Level at 6dB above 0VU)

OUTPUT 1.55V/390ohms adjustable with preset

RADIO 1.55V/4k7ohms adjustable with preset

PHONES 5.6V/220ohms adjustable with control

Connectors for:

Remote control of tape transport

Remote control of variable tape speed

Slide projector or crossfade unit (electronics optional)

Power: 100-240V ~ +-10%, Voltage selector for 100V, 120V, 140V, 200V, 220V, 240V 50--60Hz without conversion, maximum power 80 watts.

Weight: Approximately 39 lbs

Dimensions:  18" x 17" x 8"  (W x H x D)