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Eight coherers in the style of Georg Graf von Arco

Gesellschaft für drahtlose Telegraphie m.b.H System Telefunken (1903 - 1923)c. 1904

Museum for Communication Nuremberg, Museum Foundation Post and Telecommunication

Museum for Communication Nuremberg, Museum Foundation Post and Telecommunication
Nürnberg, Germany

When it receives electromagnetic waves, the resistance of the metal chips in the coherer changes, but the sensitivity was too low for practical use. In 1902, Georg Graf von Arco improved it by making the chamber, filled with silver powder and silver faience light, pointed into a wedge shape. Manual rotation can change the conductivity and thus the sensitivity of the coherer without removing it. As a result, the receiver became practical to use.

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  • Title: Eight coherers in the style of Georg Graf von Arco
  • Creator: Gesellschaft für drahtlose Telegraphie m.b.H System Telefunken (1903 - 1923)
  • Date Created: c. 1904
  • Location Created: Berlin, Deutschland
  • Rights: © Museumsstiftung Post und Telekommunikation
  • Material: Metalle, Glas, Holz
  • Inventor: Georg Graf von Arco (1869 - 1940)
Museum for Communication Nuremberg, Museum Foundation Post and Telecommunication

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