File:Pyrite cat whisker detector.jpg
Pyrite_cat_whisker_detector.jpg (548 × 372 pixels, file size: 121 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:14, 3 May 2021 | 548 × 372 (121 KB) | Materialscientist | rotation, FFT | |
17:20, 8 November 2009 | 548 × 372 (86 KB) | Chetvorno | ((Information |Description=((en|Photo of a "Wikipedia:cat's whisker detector", an antique radio component used in early crystal radio receivers, from a 1914 amateur radio book. This was called a "Pyron" type. It consisted of a fine wire on an adjus |
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