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?esky: Nejd?ležit?jší sou?ásti a sestavený detektor krystalky.
English: Galena cat's whisker detector, an antique radio component, showing parts. This example is a modern reproduction. It was used as the detector in crystal radios from about 1906 to the 1940s, to rectify the radio signal, extracting the audio signal from the radio frequency carrier wave. It consists of a crystal of the mineral galena whose surface is touched by a fine metal wire. The device is extremely sensitive to the position of the wire on the crystal and can be disrupted by the slightest vibration, so it is adjusted by trial and error before each use by dragging the wire across the crystal face until the radio begins working. (top left) Galena crystal and capsule used to hold it, (top right) "cat's whisker" wire contact on adjustable arm, (bottom) assembled device
Date 2006-07-23 (first version); 2006-07-23 (last version)
Source Originally from cs.wikipedia; description page is/was here.
Author Original uploader was Serych at cs.wikipedia
(Reusing this file)

Released into the public domain (by the author).


PD-icon.svg This work has been released into the public domain by its author, Serych at the Czech Wikipedia project. This applies worldwide.

In case this is not legally possible:
Serych grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

(All user names refer to cs.wikipedia)

  • 2006-07-23 10:09 Serych 865×723×8 (55115 bytes) Nejd?ležit?jší sou?ásti a sestavený detektor pro krystalky.
  • 2006-07-23 10:03 Serych 865×723×8 (54117 bytes) Nejd?ležit?jší sou?ásti a sestavený detektor krystalky.

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