On 5/10/2013 8:58 AM, George Dubovsky wrote:
In the case of a radial system on or just below the surface of the earth,
one or many ground rods connected anywhere to the rf ground system should
not hurt,
Please remove the phrase "RF ground system" from your vocabulary -- it
is a false concept, and leads to confusion.
Rudy Severns, N6LF, has done a lot of work studying radial systems for
verticals, especially for the lower bands. Rudy has shown that an earth
connection can significantly degrade the performance of an elevated
radial system. I suspect he might agree that adding an earth connection
to the feedpoint of a dense on-ground radial system would not hurt, and
radials connected a grounded tower certainly have that condition . Earth
connections elsewhere in the radial system are a bad idea, because they
disturb (in a bad way) the current distribution along the radial. Rudy's
published work does a great job of explaining why.
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|