• Country
• United States of America (USA)

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

• Year
• 1930

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 18915

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

• Number of Tubes
• 9

• Valves / Tubes
• 24A 24A 27 24A 24A 24A 45 45 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; Screengrid 1926-1935

• Tuned circuits
• 9 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110/125 Volt

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

• Power out
• 4.5 W (undistorted)

• Material
• Metal case, TUBES VISIBLE

• from Radiomuseum.org
• Model: SM-724 AC - Silver - Marshall; Chicago, IL

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 19.5 x 7.625 x 10.5 inch / 495 x 194 x 267 mm

• Notes
• Push-pull af output stage for 2000-2500 Ohm DC dynamic speaker.

• Net weight (2.2 lb = 1 kg)
• 45 lb 0 oz (45 lb) / 20.430 kg

• Price in first year of sale
• 133.00 USD

• External source of data
• E. Erb 3-907007-36-0

• Circuit diagram reference
• Die «Thali Schemasammlung» führt das Modell.

• Literature/Schematics (1)
• Rider's Perpetual, Volume 1 = 1931/1934 (1919 to 1931)

• 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