• Country
• Japan

• Manufacturer / Brand
• Koyo Denki Co. Ltd.; Kodaira, Tokyo

• Year
• 1976 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 109782

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Line / Batteries (any type) / 220 / 4 × 1,5 Volt

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

• Power out
• 1.1 W (unknown quality)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: KTR-1664 BFO - Koyo Denki Co. Ltd.; Kodaira,

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 355 x 292 x 158 mm / 14 x 11.5 x 6.2 inch

• Notes
• Wavebands: 150-350 kHz, 540-1600 kHz, 1,6-4 MHz, 3,7-9 MHz, 9-22 MHz, 88-108 MHz, 108-136 MHz, 148-174 MHz. BFO for SSB-receiving.

• Net weight (2.2 lb = 1 kg)
• 4 kg / 8 lb 13 oz (8.811 lb)

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

• Author
• Model page created by Hans Fischer. See "Data change" for further contributors.

• Other Models

• Here you find 55 models, 51 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Koyo Denki Co. Ltd.; Kodaira, Tokyo