If you've got an insatiable hunger for updated,
practical electronic circuits, here is a second heaping helping from the author
of Bench-Tested Circuits for Surveillance and Countersurveillance Technicians!
Once again, Tom Larsen serves up a beggar's banquet of designs that are
inexpensive, brilliantly simple and loads of fun. Best of all, they actually
work! A seasoned surveillance and countersurveillance tech, Larsen has
bench-tested every circuit to ensure that they not only talk the talk but walk
the walk. Need an incendiary method of destroying inaccessible taps and bugs?
You'll find it here. How about a poor-man's component signature analyzer that
will detect carrier-current transmitters or bugging devices that are connected
to the AC lines and remote-controlled - even when they are shut off? There are
also some sophisticated yet simple circuits for detecting telephone line cuts
and usage. If you happen to fall on the other side of the fence, you'll
appreciate Larsen's designs for building inexpensive, undetectable phone taps.
He even tells you how to use off-the-shelf components to remotely turn a bug or
a telephone tap on or off. Plus, get the lowdown on some clever, low-power-drain
circuits great for marking hidden caches or rendezvous points! Each circuit has
a detailed schematic illustrating how and why it works.