3 ms·
Perhaps some contact involved was acting as a "cat's whisker" detector. https://en.wikipedia.org/wiki/Crystal_detector https://en.wikipedia.org/wiki/Crystal_det
by jfk13 5y ago
Perhaps some contact involved was acting as a "cat's whisker" detector. https://en.wikipedia.org/wiki/Crystal_detector https://en.wikipedia.org/wiki/Crystal_detector