gravity wrote:
i guess my main point is we need to define "clear weather charged particle
noise".

It's what happens when the wind blows in the Arizona
desert when the humidity is low and there's not a
cloud in the state. There are hundreds of reports
on the web of such a phenomenon. Example:

http://www.eham.net/forums/Elmers/83174
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73, Cecil http://www.qsl.net/w5dxp