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Re: Topband: What ever happened to the 160 meter "Z" antenna?

To: Stan Stockton <wa5rtg@gmail.com>
Subject: Re: Topband: What ever happened to the 160 meter "Z" antenna?
From: Jonathan White <jonathang8ccl@gmail.com>
Date: Fri, 20 Feb 2015 13:30:41 +0000
List-post: <topband@contesting.com">mailto:topband@contesting.com>
I seem to remember that ant and another person who claimed to get a goo
match with a sloper fed with a i think 1/4w of wire conected at abt 2` from
base of tower .I have lost them notes . I  put up a vertical abt 50 ` high
with top bottom capacity hats, 120` long.Now this was suspended in a tree
80` high, and with 100 watts was heard, and nearly got a contact with a US
station, but he had local qrm.
But worked Cape Verde Isles and the Azores as a consolation prize.
thanks.. EI7BA And Mr Stevens.
Roll on the first or March.
73`s G8CCL

On 17 February 2015 at 12:16, Stan Stockton <wa5rtg@gmail.com> wrote:

> A good analysis of all this can be found from IV3PRK as he planned his
> antenna for his new QTH in HC land.
>
> http://www.iv3prk.it/user/image/site2-inverted-l-vs-vertical-t.pdf
>
> 73...Stan, K5GO
>
> Sent from my iPad
>
> On Feb 16, 2015, at 6:14 AM, Tom W8JI <w8ji@w8ji.com> wrote:
>
> >> Tom,  Thanks for the details on the "Z" for TB.  On a related matter I
> have been looking for comparisons between a "L" and a "T" firmly believing
> that a "T" would be better as in 65' up and 135' horizontal fed in the
> exact center.  However there are so many TB'ers using "L" rather than "T"s
> which begs the question....why? You need two supports for the "L" but how
> much do you gain by converting this to a "T" with even a modest ground
> plain of 6-12 radials?  Or is it just a matter of convenience and lot size?
> >
> > There is almost no difference between the T and L. It is mostly a matter
> of what someone can fit.
> >
> > When I lived on a city lot, I had restricted antenna room. I installed a
> "G5RV" between two tall pines. I dropped the feedline vertically to the
> ground. I fed the entire thing as  T on 160, and I managed to work many
> JA's, VU, UA0's, VS6, and even a JT on 160.  An L I tried was no different,
> but too many wires cluttered an area and makes an RF mess out of things.
> The G5RV gave me a good 160 antenna (fed as a T) and a pretty good 80-10
> antenna, with just one wire and one feedline, using a tuner right where the
> feeder came to ground level.
> >
> > I installed a 100 ft vertical later, and it was no better than the G5RV
> "T". As a matter of fact I just phased the 100ft tower against the G5RV to
> make a two element 160 vertical array with four patterns.
> >
> >> Again my question:  How much better is a "T" over an "L" on 160?
> >
> > No one would notice, it is not even worth one dB. We are actually lucky
> to notice 6 dB unless we A B test something.
> >
> > You would likely notice the out and up and out half wave, though. It is
> far more like a messed up dipole than a good vertical.  The one I tried
> lost several dB on groundwave over a base loaded vertical. It kept getting
> better and better as I made it more and more like an "inverted L".
> > _________________
> > Topband Reflector Archives - http://www.contesting.com/_topband
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
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