• Country
• United States of America (USA)

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

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 64098

• • 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 only (MW).

• 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: 501 Vibro-Power - United American Bosch Magneto

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 10 x 7 x 5 inch / 254 x 178 x 127 mm

• Notes

• Portable "Personal Radio". Receives police calls. AVC. Built-in antenna.

  Wood cabinet with hand-rubbed piano-case finish and real marquetry inlay.

  Factory price: $31.50. Zipper carrying case No. 500 for $3.00 ($4.00 retail).

• Net weight (2.2 lb = 1 kg)
• 8 lb (8 lb 0 oz) / 3.632 kg

• Price in first year of sale
• 52.00 $

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

• Literature/Schematics (1)
• Rider's Perpetual, Volume 5 = ca. 1934 and before (Riders 5-39, 40 ; 7-2)

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

• Literature/Schematics (3)
• -- Original prospect or advert

• 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)