• Year
  • 1909 ?
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 329034

 Technical Specifications

  • Main principle
  • Crystal or Solid State Detector
  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Carborundum Crystal Detector - Long Distance Wireless
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • Marble based carborundum crystal detector by the Long Distance Wireless Instument Company. 

    Invented in 1906 by Henry H. C. Dunwoody, this consisted of a piece of silicon carbide (SiC, then known by the trade name carborundum), either clamped between two flat metal contacts, or mounted in fusible alloy in a metal cup with a contact consisting of a hardened steel point pressed firmly against it with a spring. Carborundum, an artificial product of electric furnaces produced in 1893, required a heavier pressure than the cat whisker contact.The carborundum detector was popular[ because its sturdy contact did not require readjustment each time it. was used, like the delicate cat whisker devices.

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

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