[OKDXA] Beam at less than 1/2 wavelength high

[John Geiger]

I am looking at getting one of the MFJ Moxon antennas up in the next week
to 10 days-for the VU4 DXpedition amongst other things.  I can only get it
up 18 feet high max, due to some limitations.  I know that is over 1/2
wavelength for 10 meters, and I have definitely been thinking about a 10
meter moxon, but I really like 15m and it will be open longer, etc. How
much will performance suffer if I put a 15 meter antenna up at 18 feet
instead of the 1/2 wavelength height of 22.5 feet?

73 John AF5CC