On 09/06/2013 09:26 AM, ZR wrote:
I would think that at 6-12' spacing from the tower it would minimize
interaction on 160 or 80?
I don't know, Carl. I'll leave it to the experts. What I do know is
I have made several attempts to erect a vertical for 80 meters near
my 160 meter tower, using the same radial system. At 10 foot spacing
from the tower, the base resistance of an 80 meter quarter wave
vertical was less than 5 ohms. That to me suggests significant
interaction with the tower. At 5 foot spacing the base resistance
was less than 2 ohms! I don't have the data handy but I seem to
recall having to adjust the length considerably from a quarter
wavelength to cancel a reactive component.
73,
Paul N1BUG
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Topband Reflector
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