• Country
• United States of America (USA)

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

• Year
• 1928

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 32537

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

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

• Number of Tubes
• 3

• Valves / Tubes

• Wave bands
• - without

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

• Material
• Metal case

• from Radiomuseum.org
• Model: 825 Super Dynamic Power Pack - United American Bosch Magneto

• Shape
• Chassis only or for «building in»

• Notes
• AC mains power supply with integrated amplifier and speaker.
  Used with Model 28 chassis only to form Model 29 Receiver.

• 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, 164 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)