• Country
• United States of America (USA)

• Manufacturer / Brand
• Silver - Marshall; Chicago, IL

• Year
• 1929

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 57931

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

• Number of Tubes
• 6

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935

• Power type and voltage
• Storage and/or dry batteries

• Material
• Various materials

• from Radiomuseum.org
• Model: SM-720 BAT - Silver - Marshall; Chicago, IL

• Notes
• Two dials (primary tuning control knobs)

• Price in first year of sale
• 66.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• Radio Manufacturers of the 1920's, Vol. 3

• Other Models

• Here you find 225 models, 116 with images and 122 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Silver - Marshall; Chicago, IL