• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1963

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 133712

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

• Number of Transistors
• 7

• Semiconductors
• 2SA122 2SC76 2SC76 2SD65 2SD65 2SD66 2SD66 1T23 1T23 1T261

• 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 / 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 cm = 2.4 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: TR-731 - Sony Corporation; Tokyo

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

• Dimensions (WHD)
• 122 x 63 x 37 mm / 4.8 x 2.5 x 1.5 inch

• Notes
• Sony TR-731: Taschenempfänger mit MW (530 - 1605 kHz) und KW (3,9 - 12 MHz), schwarzes Lederetui, aufsteckbare Teleskopantenne.

• Net weight (2.2 lb = 1 kg)
• 0.2 kg / 0 lb 7 oz (0.441 lb)

• Price in first year of sale
• 8,300.00 JPY

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

• Author
• Model page created by Martin Bösch. See "Data change" for further contributors.

• Other Models

• Here you find 3913 models, 3773 with images and 947 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo