Your posts show your ignorance. You do not even understand what a dowsing rod is used for. When you sweep the rod past a target, the rod will act as if it hits a wall. This is the edge of the target's field. So the rod is used to sense the target field's "pressure". Of course something has to elevate this pressure and that could be a frequency transmitter, or the "eyebeam" of the dowser. Yes, some people might be able to sense this with a crowbar (what I call a 'thug" rod) but the finer the rod the more information the dowser can receive. It's sort of like the tin cans and string telephones.
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