In a message dated 97-07-08 17:45:32 EDT, firstname.lastname@example.org (Steve Weisbrod)
> I put six 8ft ground rods around my tower. If I were you I would put in
> at least six. They are placed at 120 degrees apart. Then the second set
> six feet away from the first set.
The hemisphere of influence for ground rods is approximately twice its
length. These hemispheres should not overlap for maximum benefit. A ten foot
ground rod has a hemisphere diameter of 20 feet, or a ten foot radius. So
these 10 foot radii make the spacing between rods a distance of 20 feet (10'
radius + 10' radius).
I would also recommend putting multiple rods in the system. Grounding
your tower is ONE part of the overall ground system.
73, Steve K7LXC
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