• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1964/1965

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 135998

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

• Number of Transistors
• 8

• Semiconductors
• 2SA70 2SA70 2SC76 2SC76 2SD65 2SD65 2SB380 2SB380 1T23 1T23

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Dry Batteries / C: 3 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: TR-831 - Sony Corporation; Tokyo

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 7 x 4 x 1.75 inch / 178 x 102 x 44 mm

• Notes

• Sony TR-831;
  SW: 3.9 - 12 MHz, dial light, telescopic antenna.

  This model sold in Australia during 1964 & 1965 for £38/17/-.rice includes batteries.

• Source of data
• -- Collector info (Sammler)

• Mentioned in
• Mingay's Price Service (Aug 1964 to Aug 1965.)

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group C2, 1965, Page S48.)

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 3995 models, 3856 with images and 959 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo