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Re: [TowerTalk] elevated radials vertical

To: "Tom McAlee" <>, <>
Subject: Re: [TowerTalk] elevated radials vertical
From: "jeremy-ca" <>
Date: Fri, 8 Jun 2007 20:23:15 -0400
List-post: <>
> In any case, I kind of like that people think their elevated systems work
> just as well.  It makes for less competition in the pileups.
> 73,
> Tom, NI1N

Dont knock it if you havent tried it.

At my prior QTH I used a 100' tower with a Christmas tree of W2PV 
monobanders as a shunt fed vertical on 160. I started with 4 radials 2" 
under the sod and couldnt even crack a pileup. By doubling the number and 
spending a week or so testing and then doubling again and again until I 
reached 64 I was convinced I was wasting my time. I was surrounded on 2 
sides by swamp and the ground was always moist back by the tower and most of 
the radials.I had fair results but nothing to get excited about. I "felt" 
about 10dB below the top guns.

On a whim thru an ad in the Want Advertiser I bought 4, used one year, rolls 
of 4' x 50' galvanized fencing that was plastic coated. It had a 2" x 4" 
mesh and all crossings were welded. When I put those sections down at the 
base of the tower I worked everything I could hear and that was with a 
measly 1200W; QRP by the standards of many on 160. This was years before 
computer programs and articles praising a heavy concentration of radials 
right at the base of the antenna had just appeared. There wasnt even a DX 
Cluster back then, it required actual skill to find and work a new one.

Moving to this QTH which is a hilltop rock pile I had no desire to waste my 
time on ground radials. Starting with one sloping vertical hanging from a 
160' guy level wire I started the same radial process, elevated 10' . With 
some lab equipment this time I recorded the feed impedence starting with no 
radials and just a slant driven ground rod in the topsoil. With 20 135' 
radials I reached the point of no further improvement altho I went to 40 to 
be sure. The feed line was decoupled with about 12" of large ferrite beads.

The next step was a second vertical using those left over 20 radials and 
then the phasing and direction switching for broadside and endfire. As many 
can attest that array was always at the top of pileups for the several years 
it was active. I also had an inverted V at 160' for comparison and high 
angle openings.

Having lost interest in ham radio about 8 years ago I went back to my other 
passion, building hot rods. Now retired I have time for both obsessions and 
the array maintenence is in process. I just might add 2 more verticals and 
then duplicate it on the 100' tower for 80M.

I for one am convinced that elevated radials are the only way to go when the 
ground beneath them has the conductivity of granite. AM broadcasters learned 
a long time ago that high rock piles were no place for their antennas and 
buried radials.



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