• Country
• United States of America (USA)

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

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 64008

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

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

• Number of Tubes
• 6

• Valves / Tubes
• 51 27 51 24 47 80

• Main principle
• Superheterodyne (common); ZF/IF 175 kHz

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 105-120 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 31 AC - United American Bosch Magneto

• Shape
• Console with any shape - in general

• Notes
• 50-60 cycle.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

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

• Literature/Schematics (1)
• Riders 2-2, 3

• Other Models

• Here you find 414 models, 163 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)