• Country
• United States of America (USA)

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

• Year
• 1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 32524

• • 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
• 6A8 6K7 6H6 6F5 6F6G or 6F6 5Y3 or 5Z4

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 640 - United American Bosch Magneto

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

• Dimensions (WHD)
• 19 x 9.5 x 8 inch / 483 x 241 x 203 mm

• 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 7 = 1936 and before

• Mentioned in
• Machine Age to Jet Age II

• Literature/Schematics (1)
• Riders 7-31, 32

• Literature/Schematics (2)
• Machine Age to Jet Age III

• Literature/Schematics (4)
• Collector's Guide to Antique Radios (7th Edition)

• 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)