• Year
  • 1936
  • Category
  • Car Radio, perhaps also + sound player/recorder
  • Radiomuseum.org ID
  • 67983
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superhet with RF-stage; ZF/IF 252 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / =6 Volt
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 7M91D Ch=5706 - Zenith Radio Corp.; Chicago,
  • Notes
  • Dashboard (instrument panel) controls; choice of separate speakers;

     

    Car radio 7-M-91D and 7-M-91S use the same case.

    7-M-91D is dashboard mounted , 7-M-91-S is mounted on steering.

  • Price in first year of sale
  • 70.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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