• Country
• United States of America (USA)

• Manufacturer / Brand
• United American Bosch (Magneto Corporation); Springfield (MA)

• Year
• 1929 ?

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

• Radiomuseum.org ID
• 32536

• • alternative name: American Bosch Magneto
  • Brand: Essex

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

• Number of Tubes
• 5

• Valves / Tubes
• 224 224 224 224 112A

• Main principle
• TRF without regeneration

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Material
• Metal case

• from Radiomuseum.org
• Model: 80 Motor Car Receiver - United American Bosch Magneto

• Shape
• Chassis only or for «building in»

• Notes
• We believe that the American Bosch Motor Car Receiver model 80 is the company's first car radio.
  This link shows some history of first car radios, compared internationally.
  
  We believe also that this is the model mentioned in the German periodical "Funkschau" No. 22 June 1, 1931 - on page 172. See also the photo on page 173 below left.

• External source of data
• Ernst Erb

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

• Other Models

• Here you find 414 models, 165 with images and 272 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from United American Bosch (Magneto Corporation); Springfield (MA)