Mike, All ¼ wave verticals have the same elevation angles. The question is
what is the feedpoint efficiency which is dominated by the ground. That
ground is a combination of your soil characteristics and the radial field
design. In my opinion, 2 elevated radials about 5 ft above the ground is a
poor ground system for good performance. Elevated 160M radials really need
to be more like 20 ? 25 ft above the ground to be efficient. Otherwise, my
experience has been you are way better off putting a lot of them on the
ground vs a few in the air ? below 10 ft.
One thing to try is take a Z + R reading at the actual feedpoint as it is
now and add 2 more radials. If the R drops by more than 0.5 Ohm, then keep
adding.
I started with an R of about 24 Ohms with 4 radials on the ground and got it
down to 12 Ohms by adding radials. I have 44. I could not see any
difference with the last 4 so I stopped. I have 2 T top verticals in phase
and they are 260 ft apart. And the same result occurred on both. That is
highly a function of my rocky (Granite) soil here.
73
Ed N1UR
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