• Country
• Japan

• Manufacturer / Brand
• DDK (D.D.K.) Co. Ltd.; Tokyo

• Year
• 1962 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 138292

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

• Number of Transistors
• 2

• Semiconductors

• Main principle
• TRF with diode detector; Reflex

• Tuned circuits
• 1 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 2 inch = 5.1 cm

• Power out
• 0.2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Lark Boy's Radio TR206S - DDK D.D.K. Co. Ltd.; Tokyo

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

• Dimensions (WHD)
• 100 x 60 x 30 mm / 3.9 x 2.4 x 1.2 inch

• Notes

• Small pocket-size transistor radio. Uses two transistors: the first one, in reflex configuration, amplifies both RF and AF detected signal; the second one is in the audio output stage. Internal ferrite antenna.

  Comes with pouch , earphone in pouch , unscrewed 1 section FM rod antenna. Gross weight incl original packing 220 gr.

• Net weight (2.2 lb = 1 kg)
• 0.155 kg / 0 lb 5.5 oz (0.341 lb)

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by Emilio Ciardiello. See "Data change" for further contributors.

• Other Models

• Here you find 13 models, 13 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DDK (D.D.K.) Co. Ltd.; Tokyo