• Country
• United States of America (USA)

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

• Year
• 1946

• 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.

• Number of Tubes
• 5

• Valves / Tubes
• 12SA7 12SG7 12SQ7 50L6GT 35Z5GT or 35Z5G

• 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)

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 15 = 1947 and before

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 6, folder 13 dated 10-46)

• Literature/Schematics (2)
• Rider's Perpetual, Volume 15 = 1947 and before (Riders (General Electric) 15-6, 7, 8)

• Literature/Schematics (3)
• General Electric Service Notes (General Electric Service Guide Volume III 1946 to 1961 Page 104)

• Literature/Schematics (4)
• Beitman Radio Diagrams, Vol. 06, 1946 (Page 53)

• Other Models

• Here you find 2916 models, 2139 with images and 2042 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