• Country
• United States of America (USA)

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

• Year
• 1929 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 103656

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

• Number of Tubes
• 7

• Valves / Tubes
• UY224 UY224 UY224 UY227 UX280 UX245 UX245

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: SM-722 [console] - Silver - Marshall; Chicago, IL

• Shape
• Console, Highboy (legs > 50 %).

• Dimensions (WHD)
• 27.5 x 51 x 15 inch / 699 x 1295 x 381 mm

• Notes
• The Silver-Marshall console SM-722 has one dial (primary tuning control knob); push-pull AF output stage. The UX245 was introduced in March 1929 and UY224 in April 1929.

• Price in first year of sale
• 270.00 $

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

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