[TowerTalk] Tuning raised radial verticals

[john at kk9a.com]

What is the reason for making the verticals 4% long?  I am far from being a
4sq guru however it would seem that you should have a choke, especially with
an elevated feedpoint. It is easy to make one using a short piece of RG-302
and a few ferrites that will leave your phased feedline long enough to still
reach the control box.


John KK9A


To:	Bryon Paul Veal NØAH <bryonveal at msn.com>, Towertalk Reflector
<towertalk at contesting.com>
Subject:	Re: [TowerTalk] Tuning raised radial verticals
From:	Rudy Bakalov via TowerTalk <towertalk at contesting.com>
Reply-to:	Rudy Bakalov <r_bakalov at yahoo.com>
Date:	Thu, 31 Aug 2017 21:23:25 +0000 (UTC)
List-post:	<mailto:towertalk at contesting.com>
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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