5A Chassis Only

Fairbanks, Morse & Co.; Chicago (IL)

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  • Year
  • 1937/1938
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 39889
    • alternative name: FMC
    • Brand: Welco

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 456 kHz; 1 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / Either transformer: 50 to 60 cycles, 110V or 40 to 60 cycle, 110V or 25 cycles, 220 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5 inch = 12.7 cm
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 5A [Chassis Only] - Fairbanks, Morse & Co.;
  • Shape
  • Chassis only or for «building in»
  • Notes

  • The Fairbanks Morse 5A is an AC operated, 5 tube BC band chassis used in various models.  BC band frequency tuning range is 540 to 1730 kHz. Volume is controlled by shorting input signal on antenna. Was available with 3 different power transformers.

    A production change was made that added a 10uF, 25V capacitor in parallel with the cathode resistor on the 41 tube, which was done to improve sensitivity.  This capacitor is NOT shown in the schematics.

    NOTE: 5A 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.

    The following models use the same chassis:

    Model Number Chassis Cabinet
    5AT1 5A Wooden Walnut Cabinet
    5AT1-K 5A Black (Ebony) Cabinet
    5AT1-V 5A Antique Ivory Cabinet

     

  • External source of data
  • Ernst Erb
  • Source of data
  • - - Manufacturers Literature
  • Circuit diagram reference
  • Rider's Perpetual, Volume 9 = 1938 and before

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