[Antennas] ladder line questions

Fri, 14 Nov 2003 11:25:43 -0500

No pic will be routed via the reflector. If I am not mistaken HTML posts are
not allowed?

73,
Ron
----- Original Message -----
From: Steve Holm <[email protected]>
To: <[email protected]>
Sent: Friday, November 14, 2003 11:14 AM
Subject: Re: [Antennas] ladder line questions

> Bill,
>
> I don't see no stickin' peaktures !!??
>
>
> I'm close to rigging up a dipole and in waiting for
> the ladder line to come,wondered about this very
> thing.
>
> 73
> Steve  [email protected]
>
> --- HSHK <[email protected]> wrote:
> > Hi Jackie,
> >
> > Besides using a 4:1 balun and then running coax, you
> > can
> > do away with the balun and use balanced coax.
> >
> > What is balanced coax ? It is two pieces of coax
> > soldered
> > so the braids are soldered together and then both
> > center
> > condictors are connected to the ladder line at one
> > end and the
> > tuner at the other. Making a form of shielded
> > balanced line.
> >
> > If you'd like to make some ladder line, the attached
> > pics will
> > show you how I have done it. It workes great and the
> > stuff
> > will probably outlast me!
> >
> > Also attached are pics of commercial 450-ohm
> > windowed
> > ladder line running alongside of my aluminum sided
> > house.
> >
> > The ladder line is suspended away from the house by
> > using
> > 30-lbs test fishing line. Fishing line attached to
> > the house with a small
> > eyelet is tied to the ladder line and another piece
> > from the ladder
> > line to a tree. This keeps the ladder-line hanging
> > three feet away
> > from the house. I have a section that runs 25 feet
> > alongside of the
> > house parallel to the driveway.
> >
> > To get the ladder-line into the house... I cut a
> > piece of wood to
> > fit in the window the way the older style window
> > screens used to,
> > so the windwo could then be closed down onto the
> > wood. The wood
> > has a slot cut into it and the ladder-line comes in
> > through it. In the
> > winter, some fiberglass insulation is place over the
> > wood on the
> > insided and the window covered with the plastic that
> > is shrunk with
> > a hair dryer. Has worked well for the past three
> > years.
> >
> > For lightning protection, I use a double pole-double
> > throw knife
> > switch I bought at a ham fest just inside the
> > window. One postion
> > it connects to a short piece of ladder-line and to
> > the tuner. The other
> > position conects the line (both sides) to a one inch
> > braided ground line
> > connected to my earth ground.
> >
> > Hope some of this helps.
> >
> > 73,
> >
> > Bill KA8VIT
> > [email protected]
> > www.qsl.net/ka8vit
> >
> > -------Original Message-------
> >
> > From: [email protected]
> > Date: Friday, November 14, 2003 12:02:22 AM
> > To: [email protected]
> > Subject: [Antennas] ladder line questions
> >
> > I would like to put up a closed loop, feed it with
> > ladder line and go into a
> > tuner. Although I would like to make my own at some
> > point, I will settle
> > for the insulated 450 ohm variety at this time until
> > I get more ambitious.
> >
> > So here are the questions:
> >
> > 1- Aside from using a 4:1 balun and using coax into
> > the house, I would like
> > to know what will interfere with the ladder line
> > that I should avoid. Can
> > it be put under a window sill or into a pvc pipe or
> > a metal pipe? I think
> > the first two are OK but the metal pipe is not. If
> > it is interrupted by a
> > binding post or connector thru Plexiglas to get
> > through a window I would
> > think the impedance would be screwed up by doing so.
> > Is this true? So what
> > does one do or not do?
> >
> > 2-What is being used to offer some lightening
> > protection to ladder line.
> > There does not seem to be too much in the way of
> > surge protectors around for
> > such.
> >
> > Any help is appreciated and since I just joined the
> > list I hope these
> > questions have not been beaten to death lately!
> > Thanks in advance for any
> > help or comments.
> >
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ [email protected]
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>
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