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Re: Topband: Snow Effect

To: topband@contesting.com
Subject: Re: Topband: Snow Effect
From: "Dan Zimmerman N3OX" <n3ox@n3ox.net>
Date: Fri, 2 Feb 2007 06:16:01 -0500
List-post: <mailto:topband@contesting.com>
> I am using a 1/4 wave inverted L with 16 burried radials. The recent snow
> has made me wonder what effect the snow will have on my ground plane?

My base loaded 60 foot vertical with small ground system (40ft x 40ft
square + a few longer radials) shows some minor detuning with a
snow/ice coat.  The effect is more if the fiberglass pole supporting
the wire is wet or icy, but there's some detuning even when I put the
pole up clean and dry.  When the snow and ice melted, the resonances
shifted back to normal.

The 2:1 SWR BW on my vertical is about 20kHz  and the shift was about
10kHz, maybe 15.  I've got a few coil taps to cover 1800-1860 normally
so it wasn't a big deal.

I doubt any of this has much effect on performance, but maybe others
can comment.

Dan
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