• Year
  • 1946
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 41825
    • Brand: Musaphonic

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • AC/DC-set / Either AC: 25-60 Hz, 105-125V or DC: 105-125 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.25 inch = 13.3 cm
  • Power out
  • 1.25 W (2 W max.)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 103 - General Electric Co. GE;
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 13 x 8.25 x 7.94 inch / 330 x 210 x 202 mm
  • Notes
  • The General Electric 103 is an AC/DC operated 5 tube BC band receiver.  The BC band frequency tuning range is 540 - 1600kHz. Has built-in loop antenna with provisions for connecting an external antenna.

    The following models use the same schematic and chassis but have different cabinets:

    Model Cabinet
    100 Brown Plastic
    101 Ivory Plastic
    103 Mahogany Wood
    105 Maple Wood

    Note: The following production changes were made on models having serial numbers of 5000 and above (Per Riders and Beitmans):

    a)   C18 connects between the output tube plate and screen instead of the plate and ground.
    b)   The plate and screen filter (C11, R6) is moved from the IF amplifier circuit to the converter plate and screen circuit.
    c)   The filament connections (pins 2 and 7) of the 12SA7 converter tube are interchanged.

  • External source of data
  • Radio Retailing (January 1946 page 11, April 1946 page 11)
  • Circuit diagram reference
  • Rider's Perpetual, Volume 15 = 1947 and before

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The model 103 is part of the collections of the following members.

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