Two-Stage Audio Amplifier No. 9 early

Federal Radio Corp. / Federal Telephone & Telegraph Co.; Buffalo, NY

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  • Year
  • 1922
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 282553
    • alternative name: Federal Recorder || Federal Tel. & Radio || Federal T&T
    • Brand: Orthosonic / Ortho-Sonic

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification; 2 AF stage(s)
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Two-Stage Audio Amplifier No. 9 [early] - Federal Radio Corp. / Federal
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 9 x 6 x 7.5 inch / 229 x 152 x 191 mm
  • Notes

  • Earliest version of the Federal Telephone & Telegraph No. 9 Two-Stage Audio Amplifier.

    Murdock tube sockets and Paragon style rheostats. 

  • Price in first year of sale
  • 58.00 $
  • Mentioned in
  • - - Manufacturers Literature (Federal Telegraph & Telephone Bulletin No. 119W October 1922 page 5)
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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The model Two-Stage Audio Amplifier is part of the collections of the following members.

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