21st Aug 2019, 11:28 am
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#1
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Heptode
Join Date: Jan 2008
Location: Durham, County Durham, UK.
Posts: 826
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The Cold War spy technology which we all use - Theremin
I've not come accross this intersting story before, maybe I'm not the only one so thought I'd share it.
https://www.bbc.co.uk/news/business-48859331#
John
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