There is a lot of antenna misinformation on this list. Your initial
assumption is basically correct. A vertical does not have low angle
radiation unless you have a perfect ground, it will then low
pseudo-brewster angle which is very effective. A 1/2wl or higher 40m
dipole is actually a very good antenna and 2el shorty 40 or even
rotatable dipole is even better. A simple antenna model will show the
gain and pattern for all of these options.
GL
John KK9A
Duane wrote:
From what I understand - solid rock below a raised vertical is not
the best option for performance.
With an underlying geography of many feet of solid metamorphic rock -
that would probably rule out the low angle benefits of vertical
antennas.
Consequently, over the years, every 40m vertical I've ever put up has
been out-performed by a dipole at .41 wavelength. I've also tried the
DX-Half Square and vertical Delta Loop with the same results.
It looks to me like my only option to outperform a 40m dipole - is a
tower and (at minimum) a 2EL yagi.
Would that assumption be correct?
Thanks
Duane
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