Reservoir Power Unit 669

Silver - Marshall; Chicago, IL

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  • Year
  • 1929
  • Category
  • Power supply/conditioner or battery or charger 
  • Radiomuseum.org ID
  • 141282

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

 Technical Specifications

  • Number of Tubes
  • 1
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 105-120 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Reservoir Power Unit 669 - Silver - Marshall; Chicago, IL
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 3.75 x 6.5 x 13 inch / 95 x 165 x 330 mm
  • Notes
  • Silver-Marshall 669 Reservoir Power Unit;
    Provides 2.5 V & DC voltage for radio's B & C circuits: 67 V, 180 & 220 - 300 V, in total 13 screw terminals.
  • Price in first year of sale
  • 35.00 $
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
  • Mentioned in
  • - - Manufacturers Literature (Silver-Marshall Data Sheet No. 12 / April 15, 1929)
  • Author
  • Model page created by a member from A. See "Data change" for further contributors.

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