Stereo HI-FI Recorder A77 Mk III

Studer-Revox; Schweiz

  • Year
  • 1971–1978
  • Category
  • Sound/Video Recorder and/or Player
  • Radiomuseum.org ID
  • 110639

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • 54
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Tape Recorder; Remote Control (with wire or wireless)
  • Power type and voltage
  • Alternating Current supply (AC) / 120; 130; 150; 220; 240; 250 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Stereo HI-FI Recorder A77 [Mk III] - Studer-Revox; Schweiz
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 415 x 359 x 180 mm / 16.3 x 14.1 x 7.1 inch
  • Notes
  • Stereo-Spulen-Tonband, 3 Motoren, 3 Köpfe, 2- oder 4-Spur, 19 und 9,5cm/sec, Impulstasten-Steuerung. Dritte Serie ist erkennbar an beweglichem linken Bandführungsstift, grauen Bandtellern, grauer Bedienfront und schwarztextuierter Laufwerksabdeckung. Ausführung als Koffer-, Einbau- oder Tischgerät (in Nussbaumgehäuse). Spezialausführungen mit anderen Geschwindigkeiten. In der Schweiz produzierte A77 haben ein "S" vor der Seriennummer

    Frequency response at 19 cm/sec (DIN 45500) 30 ÷20,000 Hz, at 9 cm/sec 30 ÷ 16,000.
    This device works in vertical or horizontal position. Duoplay, multiplay and echo effects. Equalization: NAB in recording, NAB and IEC (switchable) in playback. Two VU meters.
    Inputs: Microphone: High or low impedance switchable; Radio: AUX. Outputs for amplifier, monitor and headphones. Coil diameter up to  26.5 cm.

    54 Transistors, 32 Diodes and 4 Silicon Rectifiers.

  • Net weight (2.2 lb = 1 kg)
  • 15 kg / 33 lb 0.6 oz (33.04 lb)
  • Mentioned in
  • -- Original prospect or advert ("CQ Elettronica Italy, CD editor number 11 November 1972.)
  • Literature/Schematics (1)
  • -- Original-techn. papers. (Original "Service Manual")

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The model Stereo HI-FI Recorder can be seen in the following museums.

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