Sony TC-788-4

Data

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

• Other models in the "Professional" series:
• Sony TC-755
• Sony TC-755A
• Sony TC-756-2
• Sony TC-758
• Sony TC-765
• Sony TC-766-2
• Sony TC-788-4
• Sony TC-850-2
• Sony TC-850-4
• Sony TC-854-4
• Sony TC-880-2

Pictures

• Image: Sony TC-788-4

Links

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