Carbon Microphone as a Crystal Radio Detector

[vu2nan]

A vintage telephone carbon microphone, which possesses multiple contacts between carbon granules and metal, was tried out as a detector replacing the germanium transistor in my series-tuned, shunt fed crystal radio.

More details at

https://nandustips.blogspot.com/2019/08/carbon-microphone-as-crystal-radio.html

73,

Nandu.