[TowerTalk] Control Lines and Grounding

[jeremy-ca]

Many years ago I purchased two 1000' rolls of wire consisting of 4 twisted 
pairs of  # 24 stranded  and a shield. Ive used it as the control lines for 
all the stack switching, vertical switching and what ever else came along. I 
never thought of that twisting as being especially useful BUT come to think 
Ive never had RF problems using it. Some of the runs have been spliced 
several times as requirements changed.

Carl
KM1H




----- Original Message ----- 
From: "Jim Brown" <jim at audiosystemsgroup.com>
To: <towertalk at contesting.com>
Sent: Tuesday, July 17, 2007 4:00 PM
Subject: Re: [TowerTalk] Control Lines and Grounding


> On Tue, 17 Jul 2007 12:33:51, Hardy Landskov wrote:
>
>>Any thoughts/experiences on which is better
>
> No question -- use a dedicated twisted pair for every circuit that
> you want to control. Shielding is FAR less important than twisting.
> Bond one of the conductors to ground at the sending end. This
> provides the best noise immunity by far (and probably the least
> problem with lightning) because it minimizes the loop area.
>
> 73,
>
> Jim Brown K9YC
>
>
>
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