Tnx again Tom.
K7HP modeled this too and is saying exactly what you are saying.
As soon as the leaves fall off the trees (which will be soon here in upstate
NY)I will clean out the area beyond the stone wall and start extending the
radials.
The other week I dig up a few of my enameled #16 radials to check after they
were under the grass for several years. Still shiny bright. Can't do that
with aluminum under the ground here though. It only took 3 years to eat away
all the aluminum covering on some hardline. It was gooey.
73,
N2TK, Tony
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Tom W8JI
Sent: Thursday, September 13, 2012 1:50 PM
To: N2TK, Tony; 'topband'
Subject: Re: Topband: Radials over a stone wall
> Thanks for the info. This is what I was looking for - info from
> someone who has modeled the radials and/or actual experience with
> measurements.
> Going over the wall simplifies things for me both for the shunt fed
> tower for topband and for the radials for the 80M 4-sq.
> I plan on soldering the radials together for both antennas wherever
> they crisscross.
I'm pretty sure I posted it, but I know I modeled it out of curiosity
because I wanted to see how closely EZnec agreed with treating it like a
simple stub. If you keep the wires far enough apart each new wire divides
the impedance, so three thin wires over the wall spaced a foot apart are
quite a bit better than one thick one.
For such a small change added by a short stub, I'd not bother digging,
boring, blasting, or drilling. You could, if you are exceptionally
obsessive, run a buss along the wall on each side and run multiple small
wires over the wall.
Despite what I hear, I have number 16 ground wires on my 300 ft tower that
were installed in 1998 when I did an elevated radial test here. I started
checking those wires this summer because of all the repeated lightning hit,
day after day for a while, that went on. The original wires held up fine
after years of direct hits (except where I trenched through them), so I
don't think even #16 wire would be a wall issue for you.
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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