• Country
• Hong Kong

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: Hong Kong (HK)

• Year
• 1965 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 238119

• Number of Transistors
• 6

• Semiconductors
• 2SA52 2SA49 M8014 2SB54 2SB56 2SB56

• Main principle
• Superheterodyne (common); 2 AF stage(s)

• Tuned circuits
• 4 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 5 cm = 2 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Roton Dynamic 672 - Unknown - CUSTOM BUILT: Hong

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

• Dimensions (WHD)
• 70 x 110 x 33 mm / 2.8 x 4.3 x 1.3 inch

• Notes

• One transistor used as demodulator.

• Net weight (2.2 lb = 1 kg)
• 0.165 kg / 0 lb 5.8 oz (0.363 lb)

• Author
• Model page created by Rudolf Nemeth. See "Data change" for further contributors.

• Other Models

• Here you find 828 models, 738 with images and 19 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: Hong Kong (HK)