[TowerTalk] Ladder Line and Coax

[Michael Brown]

Thanks Tom... I thought I had been doing something wrong
all the years that I had ran ladder line to a single 80m dipole.
I use all coax fed antennas now. But back when we were
renting, and I couldn't put up a tower, 30 or 40ft of mast and
an 80m dipole fed with ladder line worked well. And the only
RFI problems I ever ran into were due to antennas that were
too close to the house, wheather it be coax fed, or fed with
ladder line. The only "hot shack" time I remember was trying
to run an end fed antenna in a temporary setup

73 - Mike K9MI

.
----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>
Sent: Tuesday, August 21, 2001 1:52 AM
Subject: Re: [TowerTalk] Ladder Line and Coax


>
> 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
> >
> >
> >
> > List Sponsored by AN Wireless:  AN Wireless handles Rohn tower
> > systems,
> > Trylon Titan towers, coax, hardline and more. Also check out our
> > self
> > supporting towers up to 96 feet for under $1500!!
> > http://www.anwireless.com
> >
> > -----
> > FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> > Submissions:              towertalk@contesting.com
> > Administrative requests:  towertalk-REQUEST@contesting.com
> > Problems:                 owner-towertalk@contesting.com
> >
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
> Join Juno today!  For your FREE software, visit:
> http://dl.www.juno.com/get/tagj.
>
> List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
> Trylon Titan towers, coax, hardline and more. Also check out our self
> supporting towers up to 96 feet for under $1500!!
http://www.anwireless.com
>
> -----
> FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
> Submissions:              towertalk@contesting.com
> Administrative requests:  towertalk-REQUEST@contesting.com
> Problems:                 owner-towertalk@contesting.com
>
>


List Sponsored by AN Wireless:  AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!!  http://www.anwireless.com

-----
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com