• Country
• United States of America (USA)

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

• Year
• 1929

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 103925

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

• Number of Tubes
• 1

• Valves / Tubes
• 280

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 105-120 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: SM-670 B - Silver - Marshall; Chicago, IL

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 3.5 x 5.25 x 13 inch / 89 x 133 x 330 mm

• Notes
• B power supply. Crackle brown finish steel box.

• Price in first year of sale
• 44.00 $

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

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

• Author
• Model page created by Vitor Oliveira. See "Data change" for further contributors.

• 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