04BR-720A Series A

Montgomery Ward & Co. (Wards, Airline); Chicago, IL

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  • Year
  • 1940
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 294270
    • Brand: Airline or Air-Line

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 465 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Alternating Current supply (AC) / 50-60Hz, 105-125 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm
  • Power out
  • 3 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 04BR-720A Series A - Montgomery Ward & Co. Wards,
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 16.25 x 14.25 x 9 inch / 413 x 362 x 229 mm
  • Notes

  • The Airline 04BR-720A is an AC operated 7 tube BC and SW band receiver.  The BC band frequency tuning range is 540 to 1550kHz.  The SW band frequency tuning range is 5.7 to 18.0MHz.  Has built-in loop antenna for BC band with provisions for connecting an external antenna.  The SW band requird an external antenna.  Phonograph input jack on rear of chassis. Also has push-pull audio output stage and push-button tuning for 6 radio stations.

    The same schematic and chassis for this model is also used for model 39BR-720A. Note that the first 2 numbers of the model number are the last two digits of the production year reversed.

    This model was built for Montgomery Ward by the Belmont Radio Corp, Chicago, ILL.  The Montgomery Ward catalog order number was 462 A 720.

    NOTE: Starting in 1939, Montgomery Ward began adding the production series in the model number, with the letter "A" in the model number indicating the first production series.  Other service documentation (such as Riders) did not consistantly use the "A" in the model number when referring to the first production series models. However models without the "A" at the end of the model number are the same as the models with the "A".

  • Price in first year of sale
  • 21.95 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 11 = ca. 1940 and before
  • Mentioned in
  • Rider's 11-36
  • Author
  • Model page created by John Kusching. See "Data change" for further contributors.

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