• Year
  • 1940 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 43243
    • Brand: Mantola

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 456 kHz
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast plus 2 Short Wave bands.
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet.
  • from Radiomuseum.org
  • Model: R-420 - Goodrich, B.F.; Akron,Ohio
  • Notes
  • Farm radio; synchr. vibrator for +B; push-pull af output stage.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 12 = ca. 1941 and before

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