> But, you’d likely need TWO of these networks — one for the bottom end
> of the bands and one for the top end of the bands.
You might get lucky and be able to bring SWR on the high end of the
bands down to a reasonable value just by tapping down on the antenna
end of the coil (reducing the L). It will not be "perfect" but
likely enough to get below 1.5:1.
73,
... Joe, W4TV
On 2014-09-14 5:47 PM, Doug Smith wrote:
You can match both 160 and 80 with a single “modified” L-Network. It
would have three components rather than just two. There would be no
switching required moving from 160 to 80.
But, you’d likely need TWO of these networks — one for the bottom end
of the bands and one for the top end of the bands. With remote
switching to flip between them.
For an example of the modified L-Net that covers both 160 and 80
(without switching) see:
http://www.w7kf.com/Articles/Rigs/SkyHook2.html
Of course, you could get a BIG edge wound variable inductor and a
vacuum variable capacitor and a couple of motors and stuff and have
at it!
73, Doug, W7KF
On Sep 14, 2014, at 7:45 AM, Gary Marks <gmarks@neo.rr.com> wrote:
I have an Inverted-L antenna for 80M & 160M and would like to make
or buy a remote matching system that would work on both ends of
both bands that would accept full power. I built a system many
years ago from a Doug DeMaw, W1FB, article in the May 1985 issue of
QST but it has never worked as well as I wanted for whatever
reason. If anyone is interested, this article can be found at the
ARRL QST archives
http://www.arrl.org/arrl-periodicals-archive-search by entering
W1FB , 1985, May, QST.
Anyone have an idea of a matching system that would do all of the
above ?
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