• Year
  • 1928
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 32457
    • 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
  • 8
  • Main principle
  • TRF without regeneration; Neutrodyne
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 105; 115; 125 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 28 AC Ch= 29 RF - United American Bosch Magneto
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • One dial (primary tuning control knob) for a 4-ganged tuning; Push-pull AF output. At that time the company was named "American Bosch Magneto Corproation" of Springfield, MA. - yet no "United" in the name. The cabinet is solid Honduras Mahogany with an oval ivory inlay on the front panel.
  • Price in first year of sale
  • 132.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
  • Literature/Schematics (2)
  • Radio Broadcast, Oct. 1928, Page 369

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The model 28 AC is part of the collections of the following members.

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