Masterpiece II (2) Variant 1

McMurdo Silver, Inc.(pre WW2); Chicago

  • Year
  • 1933
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 114352

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

 Technical Specifications

  • Number of Tubes
  • 12
  • Main principle
  • Superhet with RF-stage
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Masterpiece II [Variant 1] - McMurdo Silver, Inc.pre WW2;
  • Shape
  • Chassis only or for «building in»
  • Notes
  • 4 bands.  3 intermediate freqency amplifier stages.  Schematic dated Sept. 3, 1933.

    This earliest variant of the Masterpiece II uses a 3-tube power amplifier with two chokes on it.  It is referred to as the "long amplifier" by collectors

    According to Short wave Craft for January 1934, page 542, this model was the official radio receiver used on the second Byrd Antarctic Expedition.

  • Source of data
  • -- Collector info (Sammler)
  • Mentioned in
  • National Geographic, November 1933 advertising
  • Literature/Schematics (1)
  • Short wave Craft for January 1934, page 542

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