48 A (48 AC) Combination Receiver and Speaker Console

United American Bosch (Magneto Corporation); Springfield (MA)

  • Year
  • 1929
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 32492
    • alternative name: American Bosch Magneto
    • Brand: Essex

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 48 A Combination Receiver and Speaker Console - United American Bosch Magneto
  • Shape
  • Console, Highboy (legs > 50 %).
  • Dimensions (WHD)
  • 0 x 42 x 0 inch / 0 x 1067 x 0 mm
  • Notes
  • One dial (primary tuning control knob).

    Highboy with stretcher base. Sliding doors.

  • Price in first year of sale
  • 168.50 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
  • Literature/Schematics (1)
  • -- Original prospect or advert

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The model 48 A (48 AC) is part of the collections of the following members.

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