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M-7 (M7)

M-7 ; Akai Electric Co., (ID = 1777464) R-Player  
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M-7 ; Akai Electric Co., (ID = 1777464) R-Player
Akai Electric Co.,: M-7 [R-Player] ID = 1777464 1400x1938
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For model M-7 (M7), Akai Electric Co., Ltd.; Tokyo
 
Country:  Japan
Manufacturer / Brand:  Akai Electric Co., Ltd.; Tokyo
Year: 1962 Category: Sound/Video Recorder and/or Player
Valves / Tubes 9: 6267 6267 12AD7 12AD7 6BQ5 6BQ5 6AR5 6X4 6X4
Main principle Audio-Amplification
Details Tape Recorder; Hi-Fi equipment
Power type and voltage Alternating Current supply (AC) / 100-245 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical / Ø 7 inch = 17.8 cm
Power out 6 W (max.)
from Radiomuseum.org Model: M-7 - Akai Electric Co., Ltd.; Tokyo
Material Various materials
Shape Tablemodel, with any shape - general.
Dimensions (WHD) 310 x 540 x 226 mm / 12.2 x 21.3 x 8.9 inch
Notes

AKAI Stereo Tape Recorder/Reproducer M-7

Portable 4 track tape recorder with tubes and high fidelity characteristics due to cross - field bias system.

  • Stereo Tape 4 track Recorder/Reproducer.
  • Tape format: 1/4” width.
  • Track format: 4 Track 2 Channels.
  • Reel Size: 7 inch.
  • Tape speed: 19 cm/s ,  9.5 cm/s and 4.75 cm/s.
  • Heads: 3 Heads- 4 tracks erase, 4 tracks cross-filed head ; 4 track record/reproducer.  
  • Motors: 1 –hysteresis synchronous motor, two speed start through capacitor.
  • Wow and flutter: <0.15 %  at 19 cm/s, <0.25 % at 9.5 cm/s and <0.33 % at 4.75 cm/s.
  • Power output: 2 x 3 W.
  • Metering:  2 large VU meters.
  • Special Functions: Auto shut off, speaker switch (internal / external).
  • Inputs: 6 Jacks (3 L + 3 R)-  2 x Mic, 2 x Pick-up, 2 x Phono/Radio.
  • MIC: -55 dB at 1 kHz; Phono and Radio: -15 dB at 1 kHz.
  • Outputs: 1 x headphone stereo, 1 x  out preamplifier (per channel), 2x speaker out, 2x Line out.  
  • Controls: Volume and Tone,  one for each channel (L and R).
  • Distortion:. <3% at 1 kHz,  0 VU.
  • Frequency response: 40 Hz – 23 kHz ±3 dB at 19 cm/s; 40 Hz to 20 kHz  ±3 dB at 9.5 cm/s, 40 Hz – 10 kHz ±3 dB at 4.75 cm/s.
  • Crosstalk: > 53  dB between channels.
  • Loudspeakers: Internal: 2 x elliptical shape (18 cm x 12 cm) , 8 ohms, 6 W, 80 Hz – 12 kHz ±10dB
  • Microphones: 2 square shaped, impedance 50 kohms; 70 Hz - 15 kHz ±10 dB
  • Power comsumption: 100 W.
Net weight (2.2 lb = 1 kg) 21.5 kg / 47 lb 5.7 oz (47.357 lb)
Mentioned in - - Manufacturers Literature

Model page created by Moisés Piedade. See "Data change" for further contributors.



All listed radios etc. from Akai Electric Co., Ltd.; Tokyo
Here you find 550 models, 488 with images and 111 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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