• Year
  • 1924
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 74338
    • alternative name: Chicago Radio Lab

 Technical Specifications

  • Number of Tubes
  • 3
  • Main principle
  • Audio-Amplification
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 3M 3-M - Zenith Radio Corp.; Chicago,
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Price in first year of sale
  • 75.00 $

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