• Country
• United States of America (USA)

• Manufacturer / Brand
• Sonora Phonograph Co., Inc.; New York, N.Y.

• Year
• 1928 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 355000

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 10

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Wave bands
• Broadcast only (MW).

• Details
• Record Player (not changer)

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

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

• from Radiomuseum.org
• Model: Radiophonograph 3-RP - Sonora Phonograph Co., Inc.;

• Notes

• Six indirectly heated triodes. 2 push-pull audio final triodes with direct heating. Magnetic pick-up with separate adjustment.

  Acoustic Products Co., Inc. is listed on the schematic and was formed to assume the controlling interest in Sonora in 1927-1928. The name reverted back to Sonora in 1929.

  The radio-only version is the Sonora 3R.

• Mentioned in
• -- Original-techn. papers. (“Official Radio Service Manual” 1930, Editor Hugo Gernsback, reprinted 1984 by Vestal Press.)

• Author
• Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

• 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.