Cassette Tape Recorder A721

Studer-Revox; Schweiz

  • Year
  • 1985 ?
  • Category
  • Sound/Video Recorder and/or Player
  • Radiomuseum.org ID
  • 294595

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Cassette-Recorder or -Player; Radio Control (+Remote Wire etc)
  • Power type and voltage
  • Alternating Current supply (AC) / 50 to 60Hz, 100; 120; 140; 200; 220; 240 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Cassette Tape Recorder A721 - Studer-Revox; Schweiz
  • Shape
  • Rack
  • Dimensions (WHD)
  • 402 x 158 x 449 mm / 15.8 x 6.2 x 17.7 inch
  • Notes
  • Studer A721 is a Professional Studio Cassette Recorder/Player

    Type: 3-heads, single compact cassette deck
    Heads: 3- Erase, Record, Play (record/playback in a hybrid head)
    Track System: 4-tracks, 2-channel stereo
    Tape: 1/8” wide in a Philips Compact Cassette
    Tape speed: 4.76 cm/s (0.3% tolerance)
    Tape counter: digital (LCD)
    Motors: 4- 2 for the Dual Capstan (dual capstan with servo control); 1 for Forward;1 for Rewind
    Bias: 105 kHz, adjustable level
    Equalization: Adjustable for tapes type I, type II and type IV.
    Wow and Flutter: < 0.1% (weighted rms)

    Signal Processing:
    Noise Reduction: Dolby B and C
    Balanced inputs and outputs
    Calibrated (studio level) and uncalibrated modes
    Tape type section: Memory for 6 configurations
    Frequency response after automatic calibration (+2dB, -3 dB):
    20 Hz – 18 kHz for tape type I; 20 Hz- 20 kHz for tape type II,
    20 Hz to 20 kHz) for metal tape (type IV)
    Erasure efficiency: 68 dB
    S/N ratio: >72 dB (tape type IV + Dolby C); 55 dB (type I without Dolby)
    Distortion: < 1% (type I tape) and  <1.5% (metal tape)

    Input signal:
    Balanced and floating line (XLR connectors)  with impedance >10 kohms
    Input sensitivity (calibration: 0 dBu level = 775 mV - 225 nWb/m)
    Calibrated : + 4 dBu , adjustable from -5 dBu to +15 dBu)
    Uncalibrated . sensitivity can be increased by 10 dBu; Maximum input level 24 dBu

    Output signal:
    Balanced and floating line with transformer (XLR connectors) and impedance < 50 ohms
    Input sensitivity (calibration: 0 dBu level = 775 mV - 225 nWb/m)
    Calibrated: + 4 dBu, adjustable from -5 dBu to +15 dBu
    Uncalibrated sensitivity can be increased by 10 dBu; Maximum output level 24 dBu

    Headphone output:
    Unbalanced, impedance 200 ohms; Level adjustable in 8 steps to +12 dBu.
    VU meter: LCD Peak programme meter

    Power Consumption: < 50 W
    Remote control through a 25 pin SUB-D connector

  • Net weight (2.2 lb = 1 kg)
  • 10.5 kg / 23 lb 2 oz (23.128 lb)
  • Mentioned in
  • -- Original prospect or advert
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by Moisés Piedade. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Cassette Tape Recorder is part of the collections of the following members.

 Forum