Sony TC-788-4

Data[edit]

General

  • Manufacturer: Sony
  • Model: TC-788-4 (designation in Japan for the identical Sony TC-7850)

Type: 4-channel tape machine

  • Year of manufacture: 1974 - 1978
  • Manufactured in: Japan
  • Color: Silver, wood side panels
  • Remote control:
  • Power consumption: 70 watts
  • Dimensions: 448 x 558 x 227 mm (WxHxD)
  • Weight: 26,5 kg
  • Original price approx.: 3'500 DM


Connections

  • Number of inputs:
    • 4x Microphone: 0,2mV / -72dB
    • 4x line: 60mV / -22dB / 100kOhm
  • Number of outputs:
    • 4x Line: 0.43 V / -5dB / < 10kOhm
    • Headphones Front, Rear: 8 Ohm


Technical Data

  • 4-track, 4-channel, quadrophonic tape deck, also stereo playable

Max. Reel diameter: max. 26 cm

  • Drive: 3 motors

1x AC Servo (Dual Capstan) 2x 8-pole DC servo (reels)

  • Heads F&F: 3
    • 1x recording
    • 1x playback
    • 1x delete
  • Tracks: 4
  • Tape speeds: 19 cm/s, 38 cm/s
  • Synchronisation fluctuations:
    • ± 0.04 % (38cm/s)
    • ± 0.06 % (19cm/s)
  • Pitch fluctuations:
    • 0.02% WRMS (38cm/s)
    • 0.03% WRMS (19cm/s)
    • ± 0.03% DIN (38cm/s)
    • ± 0.04% DIN (19cm/s)
  • Overall frequency response:
    • 20Hz - 35kHz (38cm/s, ± 2dB, SLH).

30Hz - 28kHz (19cm/s, ± 2dB, SLH)

    • 20Hz - 30kHz (38cm/s, ± 2dB, Norm)
    • 20Hz - 23kHhz (19cm/s, ± 2dB, standard)
  • Noise voltage ratio according to NAB:
    • 53 dB at Low Noise-Band

56 dB at ferro-chrome band

  • Distortion factor: 1.2
  • Equalization: NAB Equalizer
  • Crosstalk attenuation at 1 kHz in stereo mode: 55 dB
  • Cancellation attenuation:
  • Premagnetization and cancellation frequency: AC 85 kHz
  • VU meter:
    • Response: 30Hz - 30Khz

Range: -40dB - +15dB

    • Rise time: 1 ms
  • Suppression attenuation at 19 cm/sec:
  • Premagnetization and cancellation frequency: 160 kHz


Special Features

  • Double-Capstan direct drive
  • Adjustable tape tension for 18 and 26 coils
  • Full logic key switch
  • Two-stage premagnetization
  • Three-stage equalization for normal, low-noise and SONY FeCr double-layer tape


Remarks[edit]


Pictures[edit]

  • Image: Sony TC-788-4

Sony TC-788-4-1.jpg


Reports[edit]

Links[edit]

  • External Link: "The Vintage Knob" website: [1]