Progressive Unit Detector & Two-Step Amplifier Set

Bowman & Co., A.W.; Boston, Massachusetts

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  • Year
  • 1921–1923
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 198245

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • TRF without regeneration; 2 AF stage(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: Progressive Unit Detector & Two-Step Amplifier Set - Bowman & Co., A.W.; Boston,
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 15 x 10 x 0 inch / 381 x 254 x 0 mm
  • Notes
  • A. W. Bowman Progressive Unit-Detector and Two-Stage Amplifier Set consisted of a Variocoupler Unit, a 43 plate Variable Condenser panel, a 21 plate Variable Condenser panel, the Vacuum Tube Detector Unit and two One-Stage Amplifier panels. This unit would drive a horn speaker.
    In the 1921-1923 Sears, Roebuck and Co. Radio catalogs, Sears offered a series of Unit panels that were produced by the Bowman Company. The panels were each 5 inches square and could be joined together to form a complete receiver.
  • Net weight (2.2 lb = 1 kg)
  • 100 lb 0 oz (100 lb) / 45.4 kg
  • Price in first year of sale
  • 100.00 $
  • Literature/Schematics (1)
  • 1923 Sears & Roebuck Radio Catalog
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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