[TowerTalk] Tuning raised radial verticals

[Rudy Bakalov]

I am measuring the impedance at the very base of the vertical with a calibrated RigExpert. According to DX Engineering the vertical should be connected without any baluns, matching networks...nothing. Furthermore, they are saying that the vertical should be resonant 4% of the target array frequency. That is, in my case, if I want to tune the array for 3.550 each individual vertical should be tuned for 3.413.
Rudy N2WQFrom: Bryon Paul Veal NØAH <bryonveal at msn.com>To: Rudy Bakalov <r_bakalov at yahoo.com>; Towertalk Reflector <towertalk at contesting.com>Sent: Thursday, August 31, 2017, 4:34:40 PM EDTSubject: Re: [TowerTalk] Tuning raised radial verticals
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 at 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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