• Year
  • 1942
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 67477
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / =6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.5 inch = 16.5 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 4B639 Ch=4B04 - Zenith Radio Corp.; Chicago,
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 19 x 9 x 8.3 inch / 483 x 229 x 211 mm
  • Notes
  • Farm radio; vibrator for +B;
  • Price in first year of sale
  • 35.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 13 = 1942 and before

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