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Re: [TenTec] Re. [Ten Tec] --- and balanced fed verticals

To: tentec@contesting.com
Subject: Re: [TenTec] Re. [Ten Tec] --- and balanced fed verticals
From: Jim Brown <k9yc@audiosystemsgroup.com>
Reply-to: k9yc@arrl.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 27 Jan 2012 09:04:44 -0800
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On 1/26/2012 9:19 PM, Rick - DJ0IP / NJ0IP wrote:
> I agree Jim, but are you implying that you cannot use openwire to feed an
> unbalanced antenna?

No, I'm simply observing that the simple act of using parallel conductor 
line does not make an antenna, or a system, balanced.  Lack of balance 
does not affect loss, but it DOES cause the line to carry common mode 
current, which in turn causes the line be part of the antenna, which 
causes it to both radiate and receive. If the line runs near noise 
sources, it will receive those noise sources. If it runs close to your 
living room (or your neighbor's living room) it can radiate RF into 
entertainment gear, telephone, and computer speakers. And, as with coax, 
we can kill common mode current on the feedline with a suitable ferrite 
choke at the feedpoint.

73, Jim Brown K9YC
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