> I can imagine the scenario at Spy Tracking HQ if the target put the coin
> in a
> parking machine: Hey, our man seems to be standing round in the street an
> awful
> long time! :)
> Debbie


If that is a resonant cavity bug, they need to be able to paint it with some
pretty strong microwaves.
The operation is explained some in "Theremin, Ether music and espionage"
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