• 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
• 57961

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

• Number of Tubes
• 4

• Valves / Tubes

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

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Kit SM-740 AC [Coast to Coast Screen Grid 4] - Silver - Marshall; Chicago, IL

• Shape
• Chassis only or for «building in»

• Notes
• One dial (primary tuning control knob), can be used with SM-670ABC or SM-675 power units.

• Price in first year of sale
• 32.00 $

• External source of data
• Ernst Erb

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

• Literature/Schematics (1)
• Walter Ashe Radio Co. catalogue for season 1928-1929

• 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