Gendis Sony Transistorized - Seven Transistor TR-72

Sony Corporation; Tokyo

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  • Year
  • 1956
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 248126

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superheterodyne (common); 3 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / D: 3 x 1.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical / Ø 10 cm = 3.9 inch
  • Power out
  • 0.2 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Gendis Sony Transistorized - Seven Transistor TR-72 - Sony Corporation; Tokyo
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 260 x 178 x 83 mm / 10.2 x 7 x 3.3 inch
  • Notes

  • This early transistor radio, Sony TR-72 came after the TR-55 - in real quantities believed to be about 40,000 Sony TR-72 GENDIS. It is a wooden table top radio. TR-72 arrived in January 1956.

    The circuit diagram shown is of a late version of the TR-72 (w/o GENDIS). An early circuit diagram of the TR-72 was shown in Electronics July 1956 "Transistor Circuity in Japan", equipped with 2T51, 2x2T52, 2T61, 2T62, 2x2T61.

    Early Gendis Sony models bears at the front the label "Transistorized", later changed to "Seven Transistor".

    See also Sony TR-72 without "Gendis" designation.

  • Net weight (2.2 lb = 1 kg)
  • 1.9 kg / 4 lb 3 oz (4.185 lb)
  • Price in first year of sale
  • 23,900.00 yen
  • Literature/Schematics (1)
  • -- Schematic

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The model Gendis Sony Transistorized - Seven Transistor is part of the collections of the following members.

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