• Country
• United States of America (USA)

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

• Year
• 1934

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 64036

• • 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
• 6F7 78 75 43 25Z5

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast (MW) and Tropical/Marine/Police Band(s) = 150-200m.

• Power type and voltage
• AC/DC-set / 105-125 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 402 ED 3 - United American Bosch Magneto

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 267 x 190 x 135 mm / 10.5 x 7.5 x 5.3 inch

• Notes
• A peculiarity of this radio is the ability to receive the old Police broadcast frequencies. In the rear panel there is a lever switch that lets you choose between the standard broadcast band and Police band.
  
  First edition has the medium waves only, the peculiarity edition 2 and 3 have, is the ability to receive the old Police broadcast frequencies.
  
  Una particolarità di questa radio è la possibilità di ricevere le frequenze sulle quali comunicava la Polizia all' epoca, infatti sul retro dell'apparecchio c'è un commutatore a leva che permette di scegliere tra le onde medie e la banda della Polizia (onde corte).
  La prima edizione del 402 ha solo le onde medie, la particolarità delle edizioni 2 e 3 è la possibilità di ricevere le frequenze sulle quali comunicava la Polizia all’ epoca, infatti sul retro dell’apparecchio c’è un commutatore a leva che permette di scegliere tra le onde medie e la banda della Polizia (onde corte).

• Net weight (2.2 lb = 1 kg)
• 3.5 kg / 7 lb 11.3 oz (7.709 lb)

• 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 5 = ca. 1934 and before

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition

• Literature/Schematics (1)
• Riders 5-34 ; 6-9, 10

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

• 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)