wrote:

wrote:
Cecil Moore wrote:
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
--
73, Cecil http://www.qsl.net/w5dxp

And it happens in inland Southern California with Santa Ana winds.

--
Jim Pennino

....and it happens here in humid Georgia, and in dry Georgia, and in
Ohio in summer and winter. There doesn't need to be a particle in
sight.

I can go outside and float the feeder of my long 160M dipole that is
300 feet high. The whack will knock you right on your rump. But that
charge is actually pulling the antenna CLOSER to the potential of the
air around the antenna. When I ground that antenna so the antenna moves
to earth potential, the corna from that antenna actually gets
worse....not better.

The reason is pretty simple. The earth is a big charge sink, and is
really at considerably different potential than the air at 300 feet
even on a clear calm day. A little wind helps quite a bit, pushing
charged air past the antenna and increasing the charge rate.

What most people miss is that it is the difference in potential between
earth (or lower heights) and the air around the antenna that causes the
leakage currents. The wind simply increases the problem.

73 Tom

Umm, no, two different things.

If it were charge building somewhere and discharging it wouldn't have
the characteristics it does, which is random, continuous, of extremely
short duration, and at a very high rate.

When it gets bad, it is quite visible as very random "snow" on TV
channels 2 through 4 on an otherwise perfect picture.

The snow is spots of extremely short duration.

Arcing (my neighbor has an arc welder so I have something to compare
it to) shows up as lines. When watching TV while he is welding it
is very obvious from the visual "noise" when he trying to start an
arc on some rusty thing versus an established arc from the length
of the visual "noise".

This particular effect ONLY happens during low humidity on very
windy days.

The intensity of the snow changes very little with wind speed, the
duration not at all, but the rate changes drastically.

I took all the electromagnetic courses to get my BSEE and I'm a
pilot, so yes, I know about corona.

--
Jim Pennino

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