Audio Frequency Transformer 501 - 502

Kellogg Switchboard & Supply Co.; Chicago (IL)

  • Year
  • 1925
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 222932
    • Brand: Wavemaster

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Audio Frequency Transformer 501 - 502 - Kellogg Switchboard & Supply
  • Notes
  • Type 501 : ratio 4.5 to 1
    Type 502 : ratio 3 to 1
  • Price in first year of sale
  • 5.00 USD
  • Mentioned in
  • Radio Broadcast, Feb. 1925, p. 848c

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