• Country
• United States of America (USA)

• Manufacturer / Brand
• General Electric Co. (GE); Bridgeport CT, Syracuse NY

• Year
• 1961 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 87722

• • Brand: Musaphonic

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

• Number of Transistors
• 6

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / AA: 2 x 1.5 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) generic. / Ø 2.62 inch = 6.7 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: P820A - General Electric Co. GE;

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

• Dimensions (WHD)
• 3 x 4.75 x 1.375 inch / 76 x 121 x 35 mm

• Notes

• High impedance speaker with reed suspended between pole pieces, drives paper cone with a stylus, and is directly driven in push-pull by a pair of collectors, without an audio output transformer. One of several contemporary GE transistor radio models to employ this kind of speaker which was originally used in the 1920's because of it's high efficiency and high impedance.

  US civil defense marks on station dial.

  There are three identical models with different case colors:

  Model	Case Color
  P820A	Black & White
  P821A	White & Blue
  P822A	Honey Beige & White

• Net weight (2.2 lb = 1 kg)
• 0.59 lb (0 lb 9.4 oz) / 0.268 kg

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 22, 1962

• Mentioned in
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 98 with photo)

• Literature/Schematics (1)
• Photofact TSM Transistor Radio Series SAMS (TSM-28, September 1963)

• Literature/Schematics (2)
• Transistor Radios (1994 Lane, page 48)

• Literature/Schematics (3)
• Transistor Radios 1954-68 (page 35 with photo)

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 2918 models, 2141 with images and 2044 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY