• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1961 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 159183

• Number of Transistors
• 6

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 4 x 1.5 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: TRW-623 - Sony Corporation; Tokyo

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

• Notes
• Circuit is similar to model TRW-621, except for omission of time switch, & different batteries.

• Source of data
• -- Schematic

• Literature/Schematics (1)
• Radio And Television Servicing books (R&TVS)

• Author
• Model page created by Keith Staines. See "Data change" for further contributors.

• Other Models

• Here you find 4017 models, 3873 with images and 965 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo