• 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
• 64012

• • 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
• 2A7 58 2A6 2A5 80

• Main principle
• Superheterodyne (common); ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

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

• Power type and voltage
• Alternating Current supply (AC)

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

• Power out
• 3 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 350 Vibro-Power - United American Bosch Magneto

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

• Dimensions (WHD)
• 11.75 x 7.875 x 6.9375 inch / 298 x 200 x 176 mm

• Notes

• Tuning range: 530 to 1600 kc (BC) and 1600 to 4200 kc (SW). 3-gang condenser. AVC.
  Tone control. Built-in antenna.

  Brown tone, solid mahogany cabinet with inlays, hand-rubbed piano finish. Full wood back.

  Factory price $39.50.

• Price in first year of sale
• 65.25 $

• 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 4 = ca. 1934 and before

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

• Literature/Schematics (1)
• Riders 4-9, 7-22

• Literature/Schematics (2)
• -- Original prospect or advert

• Other Models

• Here you find 415 models, 166 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)