50XC3 "Circle Grill"

Motorola Inc. (ex Galvin Mfg.Co. Chicago); Schaumburg (IL)

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  • Year
  • 1940/1941
perfect model
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 48829

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • AC/DC-set / 117 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Catalin (a brand name for a thermosetting polymer popular in the 1930s and 1940s - a phenol formaldehyde resin - like Bakelite, but a two-stage process with a lot of work afterwards).
  • from Radiomuseum.org
  • Model: 50XC3 "Circle Grill" - Motorola Inc. ex Galvin Mfg.Co
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 9.75 x 6 x 5.75 inch / 248 x 152 x 146 mm
  • Notes

  • Motorola A.C./D.C. models 50XC "Circle Grill" for 540-1720 kHz (kc) with 10 inch "Aero-Vane" Loop were offered in 4 different colours with a number as suffix: model 50XC1 Red with White Trim, model 50XC2 Turquoise Blue, White Trim, model 50XC3 White Onyx and model 50XC4 Brown Onyx, Amber Trim. These colours changed by the time depending on exposure to sun light. See for instance the former Turquoise for model 50XC2 in comparison to the bottom view. Some call this 50XC2 now "Greens, Amber, Rust Swirl Colour". The folder Motorola calls the material "Bright Plastic" and it gets also the creative name "Celluloid-Bakelite", but we know it as Catalin.

  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 12 = ca. 1941 and before
  • Literature/Schematics (1)
  • -- Schematic
  • Literature/Schematics (3)
  • Motorola Folder H-201, for 1941.

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