[TowerTalk] Ladder Line and Coax

[n4kg@juno.com]

I have several LadderLine Fed antennas and do not have
such severe problems.  The most noticable effect is to /
from a logging computer and the display monitor.

Tom  N4KG

On Tue, 21 Aug 2001  "David L. Thompson" <thompson@mindspring.com>
writes:
> 
> 
> The main  problem with bringing ladder line or any open wire line 
> into the
> shack lies with what I call the "hot shack" syndrome.
> With  more than one 160 meter antenna the shack was full of hot RF 
> and
> plenty of RF feedback.   This also gets into the telephones
> radios, and even TVs that are not on cable.   Even using a tuner 
> with a
> balun can cause a problem.
> 
> This is another form of fundamental overload.  The cure is to remove 
> the
> ladder line from the shack (by as many feet as possible).  I found 
> that
> using a remote balun (does not matter what values..) just outside 
> the shack
> window still causes problems although far less severe than bring 
> ladder line
> directly into the shack.  A better approach is to move the remote 
> balun to
> 40 feet or more from the shack.   I did this with a big L I had up 
> several
> years ago and the amount of RF in the shack was minimal.
> 
> 73 Dave K4JRB
> 
> 
> 
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> 
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