- 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
- 58211
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 8
- Main principle
- TRF (Tuned-Radio-Frequency but use of regeneration unknown); Screengrid 1926-1935
- Tuned circuits
- 4 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Alternating Current supply (AC) / 110 - 120 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: B31 - Sonora Phonograph Co., Inc.;
- Notes
-
The Sonora models B31, B33 and B35 have the same schematic with a transformer coupled push-pull output stage.
"Talking Machine and Radio Weekly", Volume 29 number 11 March 12 page 35 shows this tube list: 224 224 224 224 227 245 245 280.
The tubes of the two series correspond, so the use of one or the other could only be dictated by momentary availability.
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
- Mentioned in
- -- Original prospect or advert (Talking Machine and Radio Weekly Volume 29 number 11 March 12 page 35)
- Other Models
-
Here you find 81 models, 33 with images and 37 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.