From my Twitter feed: spy tech, signal sampler, SWL guide

maximus_freeman's avatarmaxp @maximus_freeman
Interesting bit of RF engineering leaksource.files.wordpress.com/2013/12/nsa-an… (cc @kb6nu)

 

dangerousproto's avatarDangerous Prototypes @dangerousproto
Variable RF signal sampler goo.gl/f7vIMM

 

hamrad88's avatarTom Stiles @hamrad88
TRRS #0212 – Shortwave Listen Guide – eBook: youtu.be/RJxclPd1bLk?a via @YouTube

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