2-Transistor Boy's Radio TR-220

Union Co. Ltd.; Yokohama

  • Year
  • 1960 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 315320

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

 Technical Specifications

  • Number of Transistors
  • 2
  • Main principle
  • TRF with diode detector; 2 AF stage(s); Reflex
  • Tuned circuits
  • 1 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 1 x 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 cm = 2.4 inch
  • Power out
  • 0.03 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 2-Transistor Boy's Radio TR-220 - Union Co. Ltd.; Yokohama
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 72 x 110 x 31 mm / 2.8 x 4.3 x 1.2 inch
  • Notes
  • Screw-on telescopic antenna, earphone jack, mounting bracket.  Ferrite antenna is vertical in the device, so it is best to operate horizontally.

    Aufschraubbare Teleskopantenne, Ohrhörerbuchse, Aufstellbügel. Ferritantenne ist senkrecht im Gerät, daher am Besten liegend zu betreiben.

  • Net weight (2.2 lb = 1 kg)
  • 0.260 kg / 0 lb 9.2 oz (0.573 lb)

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