• Country
• Japan

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

• Year
• 1973 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 183030

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

• Number of Transistors
• 15

• Semiconductors
• 2SC535 2SC454 2SC460 2SB75 2SB156

• Main principle
• Superheterodyne (common)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Line / Batteries (any type) / 110; 220 / 4 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical / Ø 9 inch = 22.9 cm

• Power out
• 0.7 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 8 Band Solid State KTR-1665 - Koyo Denki Co. Ltd.; Kodaira,

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

• Dimensions (WHD)
• 320 x 300 x 138 mm / 12.6 x 11.8 x 5.4 inch

• Notes

• All semiconductor types listed only once.

  Koyo 8 Band Solid State KTR-1665;
  Bands:
  SW2: ~9 - 22 MHz,
  SW1: ~3.7 - 9 MHz,
  MB: ~1.6 - 4 MHz,
  AM: ~540 - 1.600 kHz,
  LW: ~150 - 350 kHz,
  FM: ~88 - 108 MHz,
  AIR: ~108 - 136 MHz,
  PB & WB: ~148 - 174 MHz,
  AFC, dial light, fine tuning, tone control, two telescopic antennas, 3.3 W power consumption, made in Japan,
  terminals:
  Earphone, Headphone, SW.-EXT-ANT, VHF-Ant.,
  switch: AC-Batt, Local-DX,

  See also: Four-Star FS-1665.

  Made in Japan 403.

• Net weight (2.2 lb = 1 kg)
• 3.3 kg / 7 lb 4.3 oz (7.269 lb)

• Author
• Model page created by Philip Obetsanov. 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