Handheld portable radio, tuned to the frequency in question, and a directional antenna. When signal's stronger, antenna's pointing at the source of the issue. Get two or three people working it, can triangulate the source pretty quickly. A lot of amateur radio operators do this sort of thing for fun, its called a "fox hunt".
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Handheld portable radio, tuned to the frequency in question, and a directional antenna. When signal's stronger, antenna's pointing at the source of the issue. Get two or three people working it, can triangulate the source pretty quickly. A lot of amateur radio operators do this sort of thing for fun, its called a "fox hunt".