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MOSFET crystal sets
30 May 2015 | by Some years ago, QST had an article on a crystal set based on a zero bias MOSFET. Although I have yet to try this sort of design I have no doubt they will work well. Crystal sets derive all their power from the TX and in the past I have achieved some remarkable (well for me!) results. Best was receiving Radio Australia (from Australia) as well as some amateur Gs on 80m and 160m at a considerable distance. In the USA some 75m AM amateur stations are regularly heard at great distances.
See http://makearadio.com/visitorsprojects/ralf-mosfet.php .
Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.
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