• Country
• United States of America (USA)

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

• Year
• 1928–1930 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 57999

• Number of Tubes
• 1

• Valves / Tubes

• 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-651 [power supply] - Silver - Marshall; Chicago, IL

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 13 x 5.5 x 3.5 inch / 330 x 140 x 89 mm

• Notes
• 1 tube UX282.

• Price in first year of sale
• 47.00 $

• External source of data
• Ernst Erb

• Literature/Schematics (1)
• Chicago Salvage Stock Store catalogue, 1928?

• 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