• Year
  • 1954 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 301280

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • AC/DC-set / 117 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 4A91 - Firestone Tire and Rubber Co.
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 8.8 x 7.4 x 5.7 inch / 224 x 188 x 145 mm
  • Notes
  • The Firestone model 4A91 is a 5-tube AC/DC table radio for broadcast reception. Same schematic as model 4A90. See also USA model.

  • Author
  • Model page created by Tom Seeger. See "Data change" for further contributors.

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