Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org)
Message-ID: <004b01c6a1ec$92156fb0$6501a8c0@eagles>
From: "J. Allen" <vy1ja@northwestel.net>
To: "LF \(RSGB\)" <rsgb_lf_group@blacksheep.org>
Date: Fri, 7 Jul 2006 17:41:25 -0000
MIME-Version: 1.0
Subject: LF: Antenna Tuning
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=original
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: O

Mike and All,

The reason the tower has been bonded to ground is that the tower supports HF 
antennas as well.  The feed lines, rotor cable, and remote antenna relay 
control cable would need to be decoupled at LF which I am unfamiliar with 
accomplishing.  My attempt to decouple was to put the feedline out at 4 feet 
from the tower.  I do not want to get too far from the tower, because my 
ground system is tied to two 10 foot ground rods at the tower base.  These 
ground rods are required by local electrical code for grounding the tower. 
If I unground the tower for LF, I have to find a way to connect the rods but 
have them decoupled at LF.

Yesterday, to make sure that the HF wire antennas were not part of the 
problem, I took them all down.  The only antenna left on the tower is a 
small A4 tribander.  When this was done, it made no difference at all on the 
LF tuning.

Does anyone know how far out from the tower will be the best distance for a 
100 foot vertical riser of 1/2 inch coaxial cable?  Would I be better off by 
making the vertical riser a single #11 wire instead of the coaxial cable?

Mike, you said that this may not be the problem at all, because you had done 
a similar installation without these problems.  What is different about your 
installation?

Anyone who has been following, please brainstorm and think of any 
possibility which I should be looking for.  Because I get confused, I could 
have made just about any kind of mistake imaginable in the construction of 
the antenna, but whatever it is, that antenna sure works on receive!

I will be leaving for Edmonton for neuropsychological testing related to 
early Alzheimer's on July 9 and will be back on July 12.  Please think about 
the antenna problems.  I hope that someone can find the little fox in my 
antenna vineyard.

J.