- Country
- United States of America (USA)
- Manufacturer / Brand
- Sonora Phonograph Co., Inc.; New York, N.Y.
- Year
- 1929 ??
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 58192
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 8
- Valves / Tubes
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown)
- Tuned circuits
- 4 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Alternating Current supply (AC)
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- from Radiomuseum.org
- Model: 4R - Sonora Phonograph Co., Inc.;
- Notes
- Push-pull af output stage.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Other Models
-
Here you find 80 models, 33 with images and 36 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Sonora Phonograph Co., Inc.; New York, N.Y.