Posted by
Rick Dettinger-3 on
Dec 20, 2010; 4:34am
URL: http://elecraft.85.s1.nabble.com/Semi-OT-vertical-wire-antennas-tp5851823p5851970.html
When I moved the feed for my inverted "L" antenna from my shack to a
post set 100 feet from the shack, the noise level on receive improved
by about 3 S units. I use an SGC tuner on the post and run the coax
and power cable in an underground conduit to the shack. The radials
are hard to install as the ground cover is heavy brush and I try to
snake the #14 wire more or less through it. I only have 5 so far,
about 30 feet long. The ground is very wet in the winter. I seem to
get good results, probably because the antenna wire is 176 feet long
and 55 feet high. A shorter wire would be more intolerant of my poor
ground. I also have a 43 foot vertical mounted on the post, made of
aluminum tubing. The inverted "L" usually, but not always, works
better on 160 through 30 meters. On 20 meters, the vertical is almost
always an S unit better than the "L". On that band the height is
about 5/8 wave long and the higher feed resistance helps with the
ground situation. The two antennas are relay selected by a switch in
the shack so I don't need to walk out with a flashlight and change
jumpers anymore!
73,
Rick Dettinger K7MW
> I can't speak to the losses in the LMR-400 cable under very high
> SWR, but
> for the record my Inverted L brings the single wire into the tuner
> in the
> shack. I use a 1/4" acrylic tubing as an insulator to bring it
> through the
> outer wall into the shack.
>
> Good luck and have fun Lew!
>
> 73,
>
> Ron AC7AC
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.html