A30 Circlotron Line Amplifier (PPP)

Electro-Voice Inc.; USA

  • Year
  • 1954 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 123261
    • Brand: Buchanan

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Number of Transistors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 60 Hz, 117V = 110 -120 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 30 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: A30 Circlotron Line Amplifier - Electro-Voice Inc.; USA
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • 30W audio amplifier using the patented Circlotron (PPP) output stage. Frequency response 20 to 70.000Hz within 0.25dB.
    Built-in power supply for preamplifier PRC1 or PRC2.

    Electro-Voice model A30 is an AC operated 30 Watt audio amplifier.

  • Mentioned in
  • The Radio-Electronic Master, 1956
  • Literature/Schematics (2)
  • D.J. Tomcik and A.M. Wiggins, New amplifier has bridge-circuit output, in Audio, Novmber 1954, p. 17
  • Author
  • Model page created by Emilio Ciardiello. See "Data change" for further contributors.

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The model A30 Circlotron Line Amplifier (PPP) is part of the collections of the following members.

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