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Old 23rd Aug 2019, 5:04 am   #5
TonyDuell
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Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,213
Default Re: Tarnished Silver as a Crystal Radio Detector

I believe a lump of coke is suggested in the 'Experimental POW radio' page in the Ladybird book 'Making a Transistor Radio'. That is the one page of the book I never tried as a kid.

I was talking to a teenage-ish audience about crystal detectors and mentioned that a 'lump of coke' can work. Seeing puzzled looks around the room I added 'The fuel. Not the soft drink.... or the drug'
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