File:Diode 2.jpg
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Part of a 1920s cat’s whisker diode that uses a small crystal of the semiconductor galena. A fine piece of wire—the “cat’s whisker”—is touched on the surface until the “sweet spot” is located. The crystal then acts as a one-way valve for electrical current and can be used to separate a radio signal from its carrier wave. Courtesy: Lorne Clark.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:31, 9 September 2008 | | 250 × 159 (7 KB) | EMW (talk | contribs) | Part of a 1920s cat’s whisker diode that uses a small crystal of the semiconductor galena. A fine piece of wire—the “cat’s whisker”—is touched on the surface until the “sweet spot” is located. The crystal then acts as a one-way valve for e |
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