M-90

Automatic Radio Mfg. Co.; Boston (MA)

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  • Year
  • 1948/1949
  • Category
  • Car Radio, perhaps also + sound player/recorder
  • Radiomuseum.org ID
  • 33819

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • 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 5 inch = 12.7 cm
  • Power out
  • 2 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: M-90 - Automatic Radio Mfg. Co.;
  • Shape
  • Chassis only or for «building in»
  • Notes
  • The Automatic Radio model M-90 has a vibrator V-83 (Cornell-Dublier C-01 or 5301 Radiart) for +B.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 21, Copyright 1950

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