• Country
• United States of America (USA)

• Manufacturer / Brand
• Sparks-Withington Co., (Sparton); Jackson, Michigan

• Year
• 1931

• Category
• Car Radio, perhaps also + sound player/recorder

• Radiomuseum.org ID
• 58609

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

• Number of Tubes
• 5

• Valves / Tubes
• 36 36 36 37 38

• Main principle
• TRF without regeneration; 1 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / -? & 6 & 45 or 67.5 & 135 or 180 Volt

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

• Material
• Metal case

• from Radiomuseum.org
• Model: Sparton 41 Police Auto Receiver - Sparks-Withington Co., Sparton

• Shape
• Chassis only or for «building in»

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mentioned in
• Rider's 2-31

• Literature/Schematics (1)
• Sparton Radio Service Manual (Sparton Manual 1, Bulletin 40-1, 2, Bulletin 39-3, 4)

• Other Models

• Here you find 817 models, 365 with images and 754 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sparks-Withington Co., (Sparton); Jackson, Michigan