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David G. Nagel · November 18th 08, 12:58 AM posted to rec.radio.amateur.antenna

wrote:
On Nov 17, 3:49 pm, "David G. Nagel"
wrote:

Something you could answer if you can. I am planning to install a dipole
antenna in NVIS configuration adjacent to a mobile home type structure.
The wire will be within about 10 to 15 feet of the metal covered
structure. How much will the metal warp the radiation pattern of the
antenna. It will be in the 75 to 60 meter bands.

Dave WD9BDZ

I don't know about warping the pattern so much as making it possibly
hard to tune. You can expect some pretty serious coupling to all
that metal. So expect to have to prune it to a good match, and
maybe vary the exact tie off points of the dipole to move it a few
feet. Sometimes just a few feet can mean quite a bit of difference
in tuning.
As far as NVIS use, I wouldn't worry about the pattern too much.
It may skew it a bit, but I doubt it would really be much of a
problem.

Thanks, your information is pretty much what I expected. The antenna
will be off the long side of the trailer and I didn't know if the NVIS
pattern would favor one direction or the other. I need a west favoring
direction.

Dave WD0BDZ