• Country
• United States of America (USA)

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

• Year
• 1928/1929

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

• Radiomuseum.org ID
• 266333

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

• Number of Tubes
• 9

• Valves / Tubes
• UX222 UX222 UX222 UX222 UX201A UX222 UX222 UX112A UX112A

• Main principle
• Superhet with RF-stage; ZF/IF 65 kHz; 1 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 6 & 135 & 45 & -4.5 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: 1929 Laboratory Receiver - Silver - Marshall; Chicago, IL

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 557 x 188 x 285 mm / 21.9 x 7.4 x 11.2 inch

• Notes

• Silver-Marshall 1929 Laboratory Receiver. This radio was not officially sold even as a kit, due to patent licensing, but as a collection of parts.

  The SM-210 I.F. transformers, which are usually considered as broad-band transformers were found to tune quite sharply to 65 kHz when fed from screen grid valves.

   

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

• Literature/Schematics (1)
• "Radio Broadcast" magazine, Oct. 1928 P334

• Literature/Schematics (2)
• August 1928 Silver-Marshall General Catalog

• Literature/Schematics (3)
• Australian HRSA Radio Waves, April 1999, Pages 38 to 40

• Author
• Model page created by Stuart Irwin. 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