Richard
I will check out the Compendiums. Regarding the ground affect and the YAGI vs
parasitic verticals, once this is figured out I would like to take a Moxon
Rectangle and rotate it vertically. On this axis it would be easier to rotate
it but need to check out the same factors you mentioned here.

As an aside, we all know the ground plays an important role in the antenna
performance yet it seems there is very little effort on behalf of the amatures
to measure actual ground conditions near and far field. Getting back to the
parasitic radials, TUNING ther verticals at least allows us to compensate for
this unknown.

I know in Reg's antenna programs I generally assume AVERAGE ground conditions
or about 20 ohms to be on the conservative side. What would be nice is some
sort of set up that you could tune the antennas by use of an audio sound. It
seems in theory that you could connect a receiver to the vertical driven
element and have a signal source a few hundred yards away or more and tune the
forward for max volume and a signal from behind for min volume and strike a
happy medium....Alan