File:Precision cat's whisker detector.jpg
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![File:Precision cat's whisker detector.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Precision_cat%27s_whisker_detector.jpg/800px-Precision_cat%27s_whisker_detector.jpg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:18, 3 May 2021 | ![]() | 890 × 586 (246 KB) | Materialscientist | FFT |
18:21, 10 November 2009 | ![]() | 890 × 586 (124 KB) | Chetvorno | {{Information |Description={{en|A Wikipedia:cat's whisker detector, an antique radio component used in early crystal radios, from a 1914 book on wireless telegraphy. This was a precision micrometer type. The vertical needle on the right gently touc |
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