Grundig TK 747

Data

General

  • Manufacturer: Grundig AG, Fürth, Germany
  • Model: TK 747 Hifi
  • Type: Tape case
  • Years of manufacture: 1975 - 1977
  • Manufactured in: Fürth, Germany
  • Color: Black
  • Remote control: footswitch 255 for start/stop
  • Power supply
    • TK 747: 110 V, 220 V AC, 50 Hz
    • TK 747 U: 110 V, 120 V, 220 V, 240 V, AC, 50 Hz/ 60 Hz
  • Power consumption: 55 watts
  • Dimensions: 500 x 152 x 310 mm (WHT)
  • Weight: 12,0 kg
  • Original price approx.: 950 DM


Connections

  • Number of outputs:
    • DIN: 2 x amplifier (combined with input radio) 800 mV at 20 kΩ.
    • DIN: 2 x loudspeakers each 7 W at 4 Ω (music power).
    • DIN: 1 x headphone (cube plug) 2 V at 100 Ω.
  • Number of inputs:
    • DIN: 2 x Micro 1 - 100 mV at 100 kΩ.
    • DIN: 2 radio 3 - 300 mV at 30 kΩ
    • DIN: 2 x Phono100 - 10,000 mV at 1 MΩ

Technical Data

  • max. coil diameter: 18 cm
  • drive: 1 motor, belt drive
  • Heads: 3, 1 x record, 1 x playback, 1 x erase.
  • Tracks: 4 (quarter track)
  • Tape speeds
    • 4.75 cm/ s, 9.5 cm/ s, 19 cm/ s
  • Slip:
  • Synchronous fluctuations:
  • Pitch variations:
    • 4.75 cm/ s ≤ ± 0.2 %.
    • 9.5 cm/ s ≤ ± 0.12 %.
    • 19 cm/ s ≤ ± 0.07 %.
  • Overall frequency response:
    • 4.75 cm/ s: 30 Hz - 8,000 Hz.
    • 9.5 cm/ s: 30 Hz - 15,000 Hz
    • 19 cm/ s: 30 Hz - 18,000 Hz
  • Signal-to-noise ratio:
  • Extraneous voltage spacing:
  • Noise-to-noise ratio:
    • 4.75 cm/ s: > 57 dB
    • 9.5 cm/ s: > 60 dB

19 cm/ s: > 62 dB

  • Distortion factor:
  • Equalization:
  • Crosstalk attenuation:
  • Cancellation attenuation:
  • Premagnetization and cancellation frequency:
  • Transistors.

29 silicon, 4 germanium, 1 field effect transistor

  • Diodes
    • 20 silicon, 1 germanium diode, 1 rectifier
  • Fuses
    • 5 x 20 mm; 2 x 1 A slow blow; 1 x 0.8 A slow blow
  • Total playing time with a full coil 18 cm ø with mono
    • Long playing tape
      • 4.75 cm/ s ∼ 12 hours, 9.5 cm/s ∼ 6 hours, 19 cm/s ∼ 3 hours
    • 640 m duoband
      • 4.75 cm/ s ∼ 14 hours, 9.5 cm/s ∼ 7 hours, 19 cm/s ∼ 3.5 hours
    • 730 m duoband
      • 4.75 cm/ s ∼ 16 hours, 9.5 cm/s ∼ 8 hours, 19 cm/s ∼ 4 hours
  • Rewind time
    • approx. 255 sec. for duoband 730 m on reel 18
  • Automatics
    • Leveling and switching off at the end of the tape


Special Features

  • Horizontal/vertical operation, "keyholes" for hanging on the wall.
  • Tape tension control
  • Integrated stereo amplifier with two speakers
  • Smoked glass hood


Accessories

  • Remote control: footswitch 225 for start/stop during recording/playback
  • Retrofit kit 137: Socket "Dia Slide", connection of a control unit for slide/slide film projection
  • Sonodia 272 a in combination with retrofit kit 137 to control the projector when dubbing slide series
  • Retrofit kit 132 to convert the unit to 60 Hz
  • Stereo microphone
    • GCMS 332 stereo condenser microphone
  • Mono microphones
    • GCM 319 Condenser Microphone
    • GDM 308 Dynamic switch microphone for start/stop remote control during recording/playback
    • GDM 314
  • Windscreen 404 for mono microphones when talking close-up
  • Microphone extension cable
    • Type 267 with intermediate transformer, 10 m long
    • Type 268 without intermediate transformer, 10 m long
    • Type 274 for GDSM 331, 10 m long
    • Type 291 for GCM 319 and GCMS 332, 10 m long
  • Stereo mixer 422


Remarks


Pictures

  • Extract from brochure: Grundig TK 747

Grundig TK-747-Prospekt-1.jpg


Reports

Links