It's based on a crystal set type design with an interesting touch where the British penny coin replaces a diode. The video explains and demonstrates how the coin is used to achieve this. Quite incredible and I can see how a prisoner of war would have been able to build such a radio receiver.
See https://hackaday.com/2019/11/15/a-radio-for-the-apocalypse/
#radio #technology
#^A Radio For The Apocalypse
There’s been a spate of apocalypse related articles over the last few weeks, but when I saw an AM radio made from a hand-wound coil and an oxidized British penny, I couldn’t help but be…
source https://gadgeteer.co.za/am-radio-apocalypse-wire-coil-coin-and-earphone-zero-batteries-needed
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