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Tarnished Silver as a Crystal Radio Detector

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vu2nan:
A fully tarnished, shiny black silver artefact was tried out as a detector in place of the germanium transistor in my series-tuned, shunt-fed crystal radio.

More details at

https://nandustips.blogspot.com/2019/08/tarnished-silver-as-crystal-radio.html

73,

Nandu.

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