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Re: [TowerTalk] Testing C-3 near ground

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Testing C-3 near ground
From: W0MU Mike Fatchett <w0mu@w0mu.com>
Date: Wed, 2 Sep 2020 09:26:01 -0600
List-post: <mailto:towertalk@contesting.com>
I have done this and it will give you an idea of the antenna is acting like an antenna. If you have a tree or some other structure, getting it off the ground 20 or 30 ft should give you a good idea too.

W0MU

On 9/1/2020 9:10 PM, Tom Osborne Sr. wrote:
Hi Al

What I have done is mount the beam so that the reflector is close to the
ground and pointing upwards if possible.  Can get pretty good readings that
way.  73
Tom W7WHY



On Tue, Sep 1, 2020 at 7:57 PM Al Kozakiewicz <akozak@hourglass.com> wrote:

I'm refurbishing an old F12 C-3 that is currently disassembled, and looks
like it has been for at least a decade.  The tower it is going on isn't
here yet and won't be for a few weeks.

I'd like to assemble and do some testing before I put it up sufficient to
make sure I don't have any bad joints or assembly mistakes. Having both an
analyzer and a VNA, what, if anything, can I do while it is in the
proximity of the ground?  I'll be doing the assembly work on sawhorses, but
I could mount it on a 10' mast supported by a ladder after it is together
for testing. I don't expect to make meaningful VSWR or bandwidth
measurements, but since the 15 and 10 meter elements are fed parasitically,
it would be comforting to know that there aren't any major issues before I
put it up for real.

Al
AB2ZY


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