I'm a research meteorologist at the National Severe Storms Laboratory
and work with both Dave Rust and Don MacGorman, both lightning
physicists there. I asked them about these corona brushes and was
told that they are ineffective. Once the electric field exceeds about
50-100 kV per meter, everything -- grass, trees, fences, antennas --
are all in corona and the air is about as "saturated" with corona
ionization as it can get. These corona brushes have no effect,
especially given that the stepped leader is self-propagating over a
scale of a 100-200 m, which is about the depth of the corona
saturation from the surface.
Spend your resources on single point grounds.
Kim N5OP
At 04:34 PM 7/1/2012, K8TB wrote:
>If you believe in static dissipation arrays, you can build your own very
>inexpensively:
>
>http://www.michiganbroadcasttowers.com/broadcast/static.htm
>
>
>tom bosscher k8tb
>
>
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