• Country
• Japan

• Manufacturer / Brand
• Crown Radio Corp.; Tokyo

• Year
• 1959 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 106532

• • alternative name: Asahi Radio Mfg. Co., Ltd

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

• Number of Transistors
• 4

• Semiconductors
• 2N411 2N409 2N407 2N407 SD46

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• 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)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Crown Super All Transistor TR-820 [4 Transistor] - Crown Radio Corp.; Tokyo

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

• Dimensions (WHD)
• 5.5 x 3.25 x 2 inch / 140 x 83 x 51 mm

• Notes

• Crown 4 Transistor AM Radio Model TR-820.
  Frequency Range 535 - 1605 Kc.
  Imported by Shriro.

• Mentioned in
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 75)

• Literature/Schematics (1)
• Transistor Radios 1954-68 (p.126)

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 460, Folder 5, October 1959)

• Author
• Model page created by Peter Hoddow. See "Data change" for further contributors.

• Other Models

• Here you find 369 models, 337 with images and 98 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Crown Radio Corp.; Tokyo