Richards:
I just re-read what I wrote in my last e-mail. I must have been asleep.
The correct term for the antenna I'm suggesting is flat-top, not top-hat. You
won't find correct references in the Handbooks under the latter term, just the
former. Sorry for the misdirection.
73 de
Gene Smar AD3F
From: Richards <jruing@ameritech.net>
Date: 2008/06/26 Thu PM 10:21:49 EDT
To: Gene Smar <ersmar@verizon.net>
Cc: towertalk@contesting.com
Subject: Re: [TowerTalk] Loop vs Dipole...I'm original "asker"
EXCELLENT REPLY -- Your ideas are mirrored in some other
replies I have received off list. In fact, I am working on a plan like
that as an option. I think I can install a 50 foot mast, braced against
my home, and get as much as 130 feet long for that top-hat antenna
you describe that should tune up 80 and up, and 160 as you describe.
I have an AlphaDelta DX-B single wire sloper that could be attached to
a tower, and uses the tower as a counterpoise, and the Yagi beam
as a capacity hat. That is how it should work -- and I am told it works
OK that way - but I have it on a 25 foot mast with 7 assorted radials
(at the suggestion of AlphaDelta) and it ... well... how do you say...
sucks.
But I think your two ideas would give me an elegant solution. Tower
plus sloper, and big doublet on a tuner. That would be three simple
antennas that should cover all the bands.
THANKS -- It is serious suggestions like yours, with specific ideas,
and not just saying stuff like, "do a loop" or "you need a vertical
and radials" that is helping me focus on some tangible solutions.
BTW -- I am fortunate in that I can afford most anything that works
well and the only support out in the yard is a kind of crooked tree
at one corner of the lot. Otherwise, the trees on the other corner
are too wimpy and wispy to hold any real antenna. I have considered
a 40 foot utility pole to hide in those trees to get my wire antennas up
higher than the mere 20 feet I now have on home made masts made
of fencing top rail.
ALSO -- parenthetically, you are the first to suggest my existing wires
are too close to each other and may be interacting. No doubt there
is truth to this even if it is a minor impact, there as GOT to be SOME
impact having them all out there and at the same general height. Maybe
one or more are acting as reflectors / directors in some odd unwanted
manner... Hmmm..... gotta be.
Thanks for offering some CONCRETE suggestions I can use.
================ Richards - K8JHR =================
Gene Smar wrote:
>>
> Obviously, I'm no expert on what YOU can put up at YOUR QTH. I
> can't visualize what supports you have available or can build or how
> much $$ you have available for your hobby; that is always a
> consideration for antenna selection. But let me give you a few options
> to consider.
>
> 1. Replace all your existing wire antennas with a top-hat antenna.
>
> 2. If you were serious about having a tower on your property (and you
> have plenty of room for a self-supporter like a Trylon), then you can
> install Yagis for 20 through 10M and use the tower itself as the
> radiating element on 160 through 30M.
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