[SOC] Antenna feedline

Neal Enault wire2k at prodigy.net
Sat May 13 21:18:10 EDT 2006


The difference in loss between the two is negligible unless you have a
very long run.  If you go coax, put a balun at the feedpoint of the
dipole.  Of course, twin-lead requires a balun at the tuner.  Also, you
might consider configuring it as an inverted vee for less
directionality if that is important and if you can't get the height
required for a proper dipole.

Neal WA6OCP

--- Tom McCulloch <thom2 at att.net> wrote:

> Hi all,
> 
> I'm thinking about putting up a 40 meter dipole between a couple of
> trees 
> and would like to know the current thinking on whether to use coax
> (RG-8, I 
> guess) or 450 ohm 'window' line to feed it.
> 
> I'm using a barefoot Elecraft K2 with an auto tuner.  This will be my
> only 
> antenna (at least for now) and I operate on 40 meters about 75
> percent of 
> the time (CW).  The rest of the time I'm on 20 meters psk31 as well
> as cw on 
> 15 and ten meters, when they're open.  So for those times that I'm
> not on 
> forty I'll use the tuner.
> 
> I've read that the 'window' line is less lossy and a qrp levels I
> guess 
> that's important.
> 
> Thanks in advance for any comments you may provide.
> 
> Tom
> WB2QDG 
> 
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