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Re: [TowerTalk] how does one accomplish a 'stud' for elements?

To: "'StellarCAT'" <rxdesign@ssvecnet.com>, "'tower'" <towertalk@contesting.com>
Subject: Re: [TowerTalk] how does one accomplish a 'stud' for elements?
From: "chetmoore" <chetmoore@cox.net>
Date: Sat, 2 Jan 2016 11:06:30 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Do we need a WENCH to go with this STUD? 

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of 
StellarCAT
Sent: Saturday, January 02, 2016 9:05 AM
To: tower
Subject: [TowerTalk] how does one accomplish a 'stud' for elements?

Specifically adding something to a 4 element 40 to eliminate 15 meter 
interaction? I believe Optibeam does this – not sure how they do it. Is this 
just using the element with a parallel line tuned through a cap for max current 
on 15? If so any suggestions on how long to make it and where specifically to 
put it on each element 1/2? 

Or is there a way to use a relay, open normally, closed when on 15 that would 
add some impedance to the antenna causing it to be detuned at 15? 

Alternatively I can rotate the antenna 90 degrees but boy it would be so much 
better not to have to do that to avoid interaction on 15. 

thanks in advance,

Gary 
K9RX

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