your seeing changes in the FEEDPOINT impedance using a tuned raised radial,
thus your SWR will move if yoy mess with them. Suggest you consider using
UnUns at the feedpoints to match the coax impedence to that of the
verticals. Also, a Comtek hybred coupler.....
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On August 31, 2017 12:23:04 PM Rudy Bakalov via TowerTalk
<towertalk@contesting.com> wrote:
> Hi folks,
> I am building my 80m 4SQ. The elements are made of wire attached to 8'
> poles and then raised radials also about 8' above the ground. While tuning
> the verticals we observed an unexpected behavior- shortening the vertical
> wire has almost zero effect on the resonant frequency, while shortening the
> radial does. Is this behavior normal? What is the best approach to tuning
> verticals with a single raised radial?
> 73, Rudy N2WQ
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