Revox A 77
Data[edit]
General
- Manufacturer: Revox
- Model: A 77 Mk I MK II, MK III and Mk IV
- Years of manufacture: 1967-1981
- Manufactured in: Germany / Switzerland
- Colour: grey, silver, housing walnut
- Remote control: Cable remote control 5 m or 10 m (accessories)
- Power consumption: 70 W / with power amplifiers max. 100 W
- Dimensions, horizontal): 413 mm × 359 mm × 215 mm (W × H × D)
- Weight: approx. 15 kg
- Original price approx.: 1700 DM (list price)
Connections
- Number of outputs: 3
- 2 × output (Cinch): 2.5 V / Ri 600 Ω
- 1 × Radio (DIN): 1.2 V / Ri 2.5 kΩ
- 1 × Phones (jack 6.3 mm): 200-600 Ω
- Number of inputs: 3
- 2 × MIC (jack 6.3 mm / Cinch) Low: 0.15 mV / 50-600 kΩ / High: 2.5 mV / up to 100 kΩ
- 2 × Aux (Cinch): 35 mV at 1 MΩ
- 1 × Radio (DIN): 2.5 mV at 33 kΩ
Technical Data
- Max. Coil diameter: 26.5 cm (10.5")
- Drive: 3 external rotor AC motors (direct drive)
- Tone motor controlled via highly stable oscillator and tachogenerator
- 2 asynchronous winding motors
- Heads: 3
- Tracks: 2 or 4, depending on version
- Tape speeds: 9.5 and 19 or 19 and 38 cm/s, depending on the version, ±0.2
- Slip: <0.2 %
- Synchronization fluctuations:
- Pitch variations:
- at 38 cm/s <±0.06 %
- at 19 cm/s <±0.08 %
- at 9.5 cm/s <±0.1 %
- Overall frequency response:
- at 38 cm/s : 30-22,000 Hz +2/-3 dB and 50-18,000 Hz ±1.5 dB, respectively.
at 19 cm/s : 30-20,000 Hz +2/-3 dB or 50-15,000 Hz ±1.5 dB
- at 9.5 cm/s: 30-16,000 Hz +2/-3 dB or 50-10,000 Hz ±1.5 dB
Signal-to-noise ratio: (over band, CCITT, curve C):
- at 38 cm/s >61 dB
- at 19 cm/s >61 dB
- at 9.5 cm/s >58 dB
- External voltage spacing: n.a.
- Distortion: <2 % (0 VU, 19 and 38 cm/s), <3 % (0 VU, 9.5 cm/s),
- Equalization: NAB (record + playback) or IEC (playback)
- Crosstalk attenuation: Mono: >60 dB, Stereo: >45 dB (1 kHz)
- Erasure attenuation: ≥80 dB
- Premagnetization and erasure frequency: 120 kHz
Special Features
- Additional plug-in power amplifier 2 × 8 watts at 8 Ω; (accessories).
- Versions with wooden cabinet, case and as built-in chassis.
Versions with Dolby-B-NRS , ORF (studio version HighSpeed , symm. In/Out)
Remarks[edit]
- Other models of the same series:
- Revox A 700
- Successor Revox B 77
- Tuner:
- Revox A 76
- Amplifier:
- Revox A 78
Pictures[edit]
- Extract from brochure: Revox A 77
- Extract from brochure: Revox A 76, A 77, A 78
Test reports[edit]
- A77 Dolby, HiFi-Stereophonie 1983-05 (Arndt Klingelnberg)
- A77 analogue reel-to-reel tape recorder compared to digital recording PCM, HiFi-Stereophonie 1982-12ff (Arndt Klingelnberg)