I was only vaguely aware that receiver detection was a thing but had no idea how it worked. Googling around based on some of your keywords opened it up and also

I was only vaguely aware that receiver detection was a thing but had no idea how it worked. Googling around based on some of your keywords opened it up and also produced this declassified CIA gem 'Agent Hazard in the Super-het' https://www.cia.gov/library/center-for-the-study-of-intelligence/kent-csi/vol7no4/pdf/v07i4a08p.pdf https://www.cia.gov/library/center-for-the-study-of-intellig...