250-LW erroneous model

Emerson Radio & Phonograph Corp.; New York, NY

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  • Year
  • 1933
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 231147
    • alternative name: Emerson Television

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 132 kHz; 1 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • AC/DC-set / 110-120 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 250-LW erroneous model - Emerson Radio & Phonograph
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Notes

  • WARNING:

    In the description of model 250-LW Rider's Manual is specifying tube 78 as the first tube, but a schematic shows tube 6A7 at this position. These tubes are not interchangeable, however, as they have different bases.

    Up till know only models with a 6A7 as the first tube are known. For the model with tube 6A7 at the first position: see 250-LW (Ch= H-5-L).

    As long as no models with a 78 as the first tube are being reported, this model will be regarded as an erroneous model.

  • Circuit diagram reference
  • Rider's Perpetual, Volume 4 = ca. 1934 and before
  • Author
  • Model page created by Gidi Verheijen. See "Data change" for further contributors.

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