• Country
• United States of America (USA)

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

• Year
• 1932/1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 88274

• • 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
• 57 58 57 47 80

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; Anode bend detection

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110-120 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 16 cm = 6.3 inch

• Power out
• 2.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 305A - Super 5 Popularity - Personal Radio - United American Bosch Magneto

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 367 x 266 x 177 mm / 14.4 x 10.5 x 7 inch

• Net weight (2.2 lb = 1 kg)
• 7.1 kg / 15 lb 10.2 oz (15.639 lb)

• Price in first year of sale
• 22.00 $

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• Mentioned in
• -- Original prospect or advert (Radio Retailing, April 1933)

• Literature/Schematics (1)
• Machine Age to Jet Age III

• Literature/Schematics (3)
• -- Original prospect or advert (Radio-Retailing, June 1933)

• Author
• Model page created by Berthold Bosch † 13.2.19. See "Data change" for further contributors.

• 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)