All active electrical devices (including thunderstorms, electric shavers, and the human brain) radiate electromagnetic energy.
Over on "that other LRL forum", arguments occasionally break out over whether pocket calculators radiate energy, and if so, how far. I usually stay out of that one because yes they do radiate energy, and "how far" depends on what kind of radio receiving apparatus you've got. All of that misses the point of course: if you swap the calculator for a CB radio with 1 watt output capable of being received at 10 miles with an ordinary receiver, that wouldn't make it any better a "treasure finder" than gluing a dried toad to the swivelly thingy instead.
Right now I've got a little electronic gizmo in my pocket which can locate my car from a distance of several hundred feet even in the dark, and doesn't get it confused with other cars. It's a long distance locator that actually works, it's not faked with a swivelly thingy, and it's designed by people who actually know what the heck they're doing. And for some reason, nobody wants to argue that the thing is just a fraud.
Obviously it ain't no Ranger-Tell.
--Dave J.
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