• Year
  • 1937
  • Category
  • Car Radio, perhaps also + sound player/recorder
  • Radiomuseum.org ID
  • 51187

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; 3 AF stage(s)
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios)
  • from Radiomuseum.org
  • Model: 821P - Philco, Philadelphia Stg. Batt
  • Notes
  • Model 821P is a fixed frequency receiver, its frequency being determined by a crystal (receiver frequencies from 1550-3500 kHz). The IF-frequency can be set within the range 242-278 kHz. This model is equipped with a vibrator for the generation of B+.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 8 = 1937 and before

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