• Year
  • 1912
  • Category
  • Morse-Equipment & TTY, RTTY, TDD etc.
  • Radiomuseum.org ID
  • 280511

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Sidelever Spark Key - Marconi's Wireless Telegraph
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 5.5 x 4 x 11 inch / 140 x 102 x 279 mm
  • Notes
  • This is a Marconi Sidelever Spark Key or “Guillotine” Spark Key, as it was sometimes called for the appearance of the long lever on the side of the key. The key was used for keying a wireless telegraph spark transmitter on and off. A key similar to this was used on the Titanic when she sank in 1912. The sidelever or guillotine (e.g. the long lever on the side of the key) was needed to disable the transmitter keying circuit if the spark key contacts became welded together by the high currents being switched during operation. If this happened the transmitter would be keyed continuously. Lifting the lever up would disable the keying and shut the transmitter down. The sidelever was also used to disable accidental keying when the transmitter was not in use.

  • Author
  • Model page created by Richard Groshong. See "Data change" for further contributors.

 Collections | Museums | Literature


The model Sidelever Spark Key is part of the collections of the following members.