[TenTec] [OT] Metal Roof as Ground Plane

[Robert & Linda McGraw K4TAX]

If it's an old metal roof, the new type screws for the new roofs will do a
nice job and not leak.  Just a couple in each piece of metal is all that's
required.  They are "self drilling" too.

73
Bob, K4TAX

----- Original Message -----
From: "Duane A Calvin" <ac5aa@juno.com>
To: <tentec@contesting.com>
Sent: Tuesday, January 21, 2003 12:49 PM
Subject: Re: [TenTec] [OT] Metal Roof as Ground Plane


> Mark,
>         Quite often, metal roofing is not electrically bonded well from
> one section to the next.  So, your results may be good or very bad.  I
> tried it once on an old farm house with a flat metal roof on one newer
> addition.  It was horrible.  I had to run radials before it became
> useful.  So, if it's not too difficult, try it and hope it works, but if
> it doesn't then you'll have to decide whether you want to run radials, or
> relocate it to where radials will work better (ground-mounted.)
>
>         73, Duane
>
>
> On Tue, 21 Jan 2003 12:23:39 -0500 "Mark Erbaugh" <mark@microenh.com>
> writes:
> > Since most of my HF equipment is TenTec, there is some tangential
> > relationship to this list <g>.
> >
> > I have a 24 by 48 foot metal barn with a metal roof. The peak of the
> > roof is
> > about 20 feet high. Is there a wait to exploit this structure as a
> > ground
> > plane for an HF vertical antenna? What kind of performance
> > improvement (if
> > any) could I expect over the same antenna mounted on the ground.
> > Would I
> > still need radials?
> >
> > Currently, I have a Butternut HF6V and a Cushcraft AV5 antenna
> > available. I
> > also have a Gap Challenger, but I understand that it doesn't use a
> > ground
> > plane (elevated feed point). Would it be worth trying any of these
> > antennas
> > on the barn roof?
> >
> > The ham shack is not in the barn and the barn would not normally be
> > occupied
> > (it's just storage) when I'm on the air, but would RF exposure
> > inside the
> > barn be an issue.
> >
> > 73,
> > Mark
> >
> > P.S. There's 2 inches of snow on the ground and temps in the 20s and
> > I have
> > good antennas up now, so this is just a though experiment for later
> > in the
> > spring.
> >
> > _______________________________________________
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> > TenTec@contesting.com
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> >
> >
>
>
> Duane Calvin, AC5AA
> Austin, Texas
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