• Country
• United States of America (USA)

• Manufacturer / Brand
• 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.

• Number of Tubes
• 12

• Valves / Tubes
• 58 2A7 58 58 58 56 56 56 58 2A3 2A3 5Z3

• 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

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 40 models, 38 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from McMurdo Silver, Inc.(pre WW2); Chicago