File:Kristallradio (3).jpg

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Description
Svenska: Kristallmottagare, kristallen och avkännaren av märke "Ideal" D.R.P. (Deutsches Reichs Patent)
English: Cat's whisker detector, an antique radio component, from a Swedish crystal radio receiver. It consists of a fine wire attached to an adjustable arm that touches the surface of a crystal of galena (lead sulfide). It was used in crystal radios from about 1906 to World War 2. It functioned as a crude semiconductor diode, rectifying the AC radio signal to extract the audio (sound) signal from the radio frequency carrier wave.
Date
Source Own work
Author Holger.Ellgaard

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current15:55, 28 December 2008Thumbnail for version as of 15:55, 28 December 20081,375 × 975 (252 KB)Holger.Ellgaard (talk | contribs){{Information |Description={{sv|1=Kristallmottagare, kristallen och avkännaren D.R.P. (Deutsches Reichs Patent)}} |Source=Uppladdarens egna verk (uploader's own work) |Author=Holger.Ellgaard |Date=2008 |Permission=yes |other_vers
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