- 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
- 63980
-
- alternative name: American Bosch Magneto
- Brand: Essex
- Number of Tubes
- 5
- Valves / Tubes
- 239 239 239 unknown_Tube 52
- Main principle
- TRF without regeneration
- Tuned circuits
- 3 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Direct Current supply (DC) / 110 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- from Radiomuseum.org
- Model: 207A - United American Bosch Magneto
- Notes
- Rider dates 1923, which is impossible for these tubes!
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 7 = 1936 and before
- 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)