In the past N6BV has been kind enough to supply me the "numbers" for my
QTH using his wizardry to generate them in a few minutes and then ship me the
files.
His files went up to about 14000 feet, and his reasoning was beyond that
the effects are minimal. I would imagine this is true except in extreme
cases.
I strongly recommend EVERYONE who is contemplating putting up a tower
(except those who live on a table top terrain) do the HFTA thing.
Even here in fairly flat FL, where my dropoff to the NE is about 95 feet
over a 1000 ft distance, the difference in takeoff angle compared to flat
ground is significant. My terrain at KH6 was such that it precluded me from
putting up tribanders higher than around 90-95 feet, even though they were
mounted on a 150 foot tower. Who would have guessed anything higher than
95 feet would not have worked as well on 20 on an 8000 mile path to EU?
Thanks to HFTA, I knew.
I have used Dean's program on both of my stations and if the time ever
comes to build another, I'll do it again.
Bill K4XS/KH7XS
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