Power Amplifier and Plate Supply Type 400

General Radio Company; Cambridge (MA)

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  • Year
  • 1929
  • Category
  • Power supply/conditioner or battery or charger 
  • Radiomuseum.org ID
  • 328541
    • alternative name: GenRad

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

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Power Amplifier and Plate Supply Type 400 - General Radio Company;
  • Shape
  • Tablemodel, with any shape - general.
  • Notes

  • Power Amplifier and Plate Supply

    This unit operates from 110 volt (60 cycle) A.C. and provides plate voltages of 45, 90 and 130 in addition to supplying the proper plate voltage for the UX -171 tube of the power amplifier.

    An outstanding feature of the type 400 is that it has no variable resistance voltage controls to get out of order and cause noisy reception. Voltages in this unit are controlled by fixed resistances tightly sealed from dust and moisture.

    This unit is designed for the UX -213 Rectron rectifier tube and UX -171 power tube in the amplifier. It is contained in a metal case with black crystalline finish. The type 400 may be used to replace "B" batteries with all popular makes and circuits of radio receivers regardless of whether they may be operated by dry cell or storage battery tubes.

  • Price in first year of sale
  • 68.00 USD
  • Mentioned in
  • -- Original prospect or advert (Radio News, Nov 1926, Page 609.)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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