4 ms·
You can also use a non linear junction detector https://en.wikipedia.org/wiki/Nonlinear_junction_detector https://en.wikipedia.org/wiki/Nonlinear_junction_dete
by throwaway2048 8y ago
You can also use a non linear junction detector
https://en.wikipedia.org/wiki/Nonlinear_junction_detector https://en.wikipedia.org/wiki/Nonlinear_junction_detector
They are electronically very simple (they are the boxes with wands and earphones you always see in espionage movies)
- h0l0cube 8y agoQuoting from the wiki article: > As a countermeasure against an NLJD, professional covert listening devices (bugs) of the Central Intelligence Agency were equipped from 1968 onwards with a so-called isolator. An isolator is a 3-port circulator of which the return ports is terminated with a resistor. Any energy injected into the bug by an NLJD, will be absorbed by the resistor, resulting in no (or very little) reflected energy. An example of such a bug is the CIA's SRT-107. Do modern concealed spy cameras have this kind of tech? Is there anyway to counter such a counter-measure?
- throwaway2048 8y agoIt would require it being built into the IC itself, and no ICs except ones intelligence agencies have access to are going to offer this feature, because it has no other real purpose than evading NLJDs
- owenversteeg 8y agoBut they are about $10k, and sadly one of the few things where I don't think there are any working DIY ones.