• Country
• Japan

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

• Year
• 1962 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 138294

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

• Number of Transistors
• 3

• Semiconductors

• Main principle
• Superheterodyne (common); Reflex

• 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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Lark 3 Transistor TR-303S - DDK D.D.K. Co. Ltd.; Tokyo

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

• Notes
• 3 PNP transistors plus 2 diodes: one as frequency converter, the second as IF and AF amplifier in a reflex circuit, the third as AF output amplifier. Built-in ferrite antenna.

• 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