678

General Electric Co. (GE); Bridgeport CT, Syracuse NY

Data
Forum
Pictures
Collections

  • Year
  • 1956
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 96880
    • Brand: Musaphonic

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

 Technical Specifications

  • Number of Transistors
  • 5
  • 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 / Pack form battery 4.5 & 13.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 678 - General Electric Co. GE;
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 5.5 x 3 x 1.5 inch / 140 x 76 x 38 mm
  • Notes

  • The model 678 is in color green.
    The same model was made in the following colors: model 675 in black, model 676 in ivory, model 677 in red and model 678 in green. They are General Electric's first transistor radios - and it is the second pocket sized transistor radio, made sorthly after Regency's model TR1 pocket radio. In between is only the much bigger sized Raytheon model 8TP, which was also made in 4 colors.
    The technique of the GE pocket transistor radio is unique. See SAMS set 329, folder 7 from September 1956 and Beitman vol 16 show only 675 and 676 what indicates that 677 and 678 followed later than 675 and 676 - in 1956 instead of 1955. We include SAMS for the latter two. The set is made for a "Pack form battery" with a common positive terminal: Eveready number 239 or Burgess XX9. Detection accomplished by a diode just before the 2N78.
    Couleur Vert, pile bi voltage 4.5 & 13,5v Eveready 239 ou Burgess XX9.

  • Net weight (2.2 lb = 1 kg)
  • 0.4 kg / 0 lb 14.1 oz (0.881 lb)
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 16, 1956
  • Mentioned in
  • Antique Radio Magazine n.88, January-February 2009, page 28. Written in Italian.

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The model 678 is part of the collections of the following members.

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