57-A

Howard Radio Company; Chicago, IL

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  • Year
  • 1933/1934 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 44599

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; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • AC/DC-set / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 57-A - Howard Radio Company; Chicago,
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 295 x 216 x 153 mm / 11.6 x 8.5 x 6 inch
  • Notes
  • The Howard model 57-A is a table top radio for broadcast only according to the schematic. The scale indicates that there may be export models with long waves added. It must have been exported in quantities that there is a schematic (No. 460) from 1934 made by "Constructeur" in France. The Fivre tubes suggest even that it may have been assembled in Europe, but could be a replacement. The grid of the tube 75 needs a bias battery of one volt! It is essential to check after such a long time, otherwise you blow the tube during time.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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