• Country
• United States of America (USA)

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

• Year
• 1934 ?

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

• Radiomuseum.org ID
• 63970

• • 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
• 78 6A7 78 75 41

• Main principle
• Superhet with RF-stage; ZF/IF 456 kHz

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / =6 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Police Car Radio 149 - United American Bosch Magneto

• Shape
• Chassis only or for «building in»

• Notes
• 2250 to 2500kc; +B by "Magmotor" (Einanker-Umformer);

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• 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)