Single-Valve Note Magnifier No. 521

Sullivan, H.W., London

  • Year
  • 1923
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 205009

 Technical Specifications

  • Number of Tubes
  • 1
  • Valves / Tubes
  • Main principle
  • Audio-Amplification; 1 AF stage(s)
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case, TUBES VISIBLE.
  • from Radiomuseum.org
  • Model: Single-Valve Note Magnifier No. 521 - Sullivan, H.W., London
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • H. W. Sullivan LTD. Sullivan Broadcasting Receivers - Single-Valve Note Magnifier List No. 521 This audio amplifier was for the No. 512 Two-Valve Cabinet Receiver
  • Price in first year of sale
  • 7.00 GBP
  • Literature/Schematics (1)
  • April 7, 1923 The Wireless World & Radio Review ad on Rear Cover
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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