I regularly search up to roughly 950 MHz. Antennas are smaller, RFI is
relatively less, requiring one to be at the source, so you can pinpoint
it MUCH more easily. When I hear it on HF, I go out and search with
VHF, and go up from there. HF was good, until one pole covered 18
square miles with noise. Even the power company uses UHF to pinpoint,
figured they wouldn't spend $$$$$, or waste time if UHF wasn't
adequate. I usually start around 120 MHz, when hearing noise below
that, move to around 325, then 4xx, then ~950 MHz.
Kurt
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