On Sun, 28 Oct 2007 08:41:47 -0700 (PDT), steve d wrote:
>How about this though: short the ladder line at the tuner and
feed
>it as a T against ground on 160?
That can work.
See
http://audiosystemsgroup.com/K9YC/k9yc160TopLoad.htm
> There are a couple issues with this. First, my shack is on the
>second floor. The ground line would have to be pretty long. For
>use as part of the antenna, Im not sure this would matter much
>(ground for the rigs is another issue).
No, it is NOT an issue. A connection to the earth matters ONLY for
lightning protection. That's important, but it has nothing to do
with how well your antennna works.
What you need is some sort of counterpoise (like my fence, or
radials).
>The other one is the ladder line would have to run parallel to
>one leg of the antenna with several feet of spacing as the shack
>is on one end of the house. However, I think it might work better
> than anything I have, regardless of the issues.
So did mine, sort of. Don't worry about it. :)
>
> If I do try it, do I run the shorted ladder line off the
longwire port? Or should I use one of the unballanced SO-239's?
If I go through the longwire port I go through the 4:1 balun.
Do NOT go through the balun. Just go straight to one of the SO239
connectors. Tie the counterpoise to the chassis of the antenna
tuner.
73,
Jim K9YC
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