• Country
• United States of America (USA)

• Manufacturer / Brand
• Fairbanks, Morse & Co.; Chicago (IL)

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 39861

• • alternative name: FMC
  • Brand: Welco

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

• Number of Tubes
• 12

• Valves / Tubes
• 6K7G 6J7G 6L7G 6C5G 6K7G 6K7G 6H6G 6Q7G 6C5G 6L6G 6L6G 5V4G

• Main principle
• Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: 12A [Chassis Only] - Fairbanks, Morse & Co.;

• Shape
• Chassis only or for «building in»

• Notes

• The Fairbanks Morse 12A is an AC operated, 12 tube BC and SW band chassis. Has dual drive high and low speed tuning, silent tuning between stations and push-pull audio output stage.

  Band Frequency Ranges are as follows:
  BC Band......................530 - 1700kHz
  SW Band #1................1.62 - 5.5MHz
  SW Band #2................5.4 - 18.2MHz
  SW Band #3................17.65 - 73.0MHz

  NOTE: 12A is the chassis number and NOT the model number.  Please post pictures of the radio's on the appropriate radio model page and NOT to this page.

  NOTE: Production changes were made to the 12A chassis and are documented in the changes section of Riders volume 11, page 11-3.

  The following models use the 12A chassis and schematic:

  Model Number	Chassis	Cabinet
  12AC-6	12A	Console Model

• External source of data
• Radio Today June 1937 page 117, Fairbanks Morse Catalog 1938

• Source of data
• - - Manufacturers Literature

• Mentioned in
• Pre-War Consoles (Page 72)

• Literature/Schematics (1)
• Rider's Perpetual, Volume 8 = 1937 and before (Fairbanks Morse Section pages 8-11, 8-12, 8-13)

• Literature/Schematics (2)
• Rider's Perpetual, Volume 11 = ca. 1940 and before (Changes Section page 11-3)

• Literature/Schematics (3)
• Gernsback Official Radio Service Manual (Volume 7, page 1543)

• Literature/Schematics (4)
• Radio Craft (October 1937 page 211, November 1937 pages 290, 291)

• Other Models

• Here you find 147 models, 87 with images and 117 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fairbanks, Morse & Co.; Chicago (IL)