B30 Ortho-Sonic (Orthosonic) loudspeaker visible

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

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  • Year
  • 1925
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 207353
    • alternative name: Federal Recorder || Federal Tel. & Radio || Federal T&T
    • Brand: Orthosonic / Ortho-Sonic

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 AF stage(s)
  • Tuned circuits
  • 3 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • -Loudspeaker incorporated, but system not known.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: B30 Ortho-Sonic [loudspeaker visible] - Federal Radio Corp. / Federal
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Notes
  • Three dials (primary tuning control knobs) . Also with 199 tubes. It seems that this Federal model Orthosonic B30 was made in two versions, one with a loudspeaker in the left compartment, not visible when the lid is closed, and this one with a loudspeaker in front which comes up as a part of a circle on top. The Federal B30 needs different battery voltages: 135, 67.5, 22.5, -4.5, -9 plus filament.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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