• Year
  • 1895–1906
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 227335

 Technical Specifications

  • Number of Tubes
  • 0
  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Coherer Detector - Marconi Co. Marconiphone,
  • Shape
  • Miscellaneous shapes - described under notes.
  • Notes
  • The Coherer was the first active device that was used by the Marconi Wireless Telegraph Company to detect radio frequency signal from spark transmitters. It consists a glass tube fitted with two silver plugs forming angled electrodes with a narrow gap between them filled with metal filings. The Marconi Coherer used a very small quantity of nickel filings to which was added a small percentage of silver. The glass tube was mounted to an ivory rod so the striker had a place to hit when decohereing the coherer.

  • Author
  • Model page created by Alan Larsen. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Coherer Detector is part of the collections of the following members.

Museums

The model Coherer Detector can be seen in the following museums.

 Forum