[Antennas] Domestic take off angles vs freq

[Steve L.]

I'm looking for any written discussion or data of
take-off angles vs. freq and distance. I've seen brief
summary tables but they are all DX oriented. I'm
trying to optimize my antenna heights for domestic
contests such as Sweepstakes. Last year my 3el yagi at
85' was completely blown away by my lazy-h at 65' to
the USA from Western WA, I'm certain the yagi's take
off was way too low. Now I'm kinda wondering if maybe
my 15m ant should be lower as well.

I've had good success putting my HF antennas the
highest I can possibly get them for DX stuff, that's
not the concern. I have the ability to set heights
since I'm using trees for antenna supports.

I've modeled these antennas a lot (NecWinPlus+) and
have had very good luck selecting antennas and their
heights to eliminate the near-straight-up lobes - my
RX is much quieter.

73, Steve N4SL Machias, WA USA CN88xa

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