4-A

Western Electric Company Inc.; New York (NY)

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  • Year
  • 1922
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 222014

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superheterodyne (common); 2 AF stage(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 4-A - Western Electric Company Inc.;
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 26.75 x 8.75 x 6.75 inch / 679 x 222 x 171 mm
  • Notes
  • Western Electric 4-A Superheterodyne Receiver designed by Harald Friis. During his career with the Bell System, Harald Friis contributed substantially to almost every aspect of the radio art. His earliest work was on vacuum tube efficiency. He then worked on ship-to-shore radio reception. In the early twenties he built the very first field measuring set, for the 300 to 400 meter range. He also designed the first commercial double-detection or superheterodyne radio receiver, the Western Electric 4A receiver. Double detection means that there are two "Detector" stages: the first one is the mixer (of signal and oscillator frequency), the second one is for demodulation.
  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

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