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
- Long playing tape
- 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
- Other models of the same series:
- Grundig TK 547
- Grundig TK 747
- Grundig TK 847
- Grundig TK 850 FM
- Grundig TS 1000
Pictures
- Extract from brochure: Grundig TK 747
