• Country
• United States of America (USA)

• Manufacturer / Brand
• Pearl Radio Corporation; Philadelphia, PA

• Year
• 1923

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 220250

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Friction-Contact Variocoupler - Pearl Radio Corporation;

• Notes
• Friction-Contact Variocoupler.

• Mentioned in
• Radio Broadcast, Sep. 1923, p. 440

• Author
• Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pearl Radio Corporation; Philadelphia, PA