• Country
• Japan

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: Japan

• Year
• 1960 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 234548

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

• Number of Transistors
• 2

• Semiconductors
• 2SA83 2SB77

• Main principle
• TRF with diode detector; Reflex

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4.5 cm = 1.8 inch

• Power out
• 0.05 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Champion 2 Transistor Deluxe NR-21 - Unknown - CUSTOM BUILT: Japan

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

• Dimensions (WHD)
• 63 x 103 x 30 mm / 2.5 x 4.1 x 1.2 inch

• Notes

• Ein Transistor-Radio aus der "Boy's Radio" genannten 2-Transistor-Empfänger - Serie.

• Author
• Model page created by Joachim Gittel †. See "Data change" for further contributors.

• Other Models

• Here you find 1147 models, 1008 with images and 102 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: Japan