Within the next few months I will begin construction of my new contest
station on the Big Island in Hawaii. I have all the bases covered as far as
10
through 80 meters goes.
My QTH sits on a hill with a big downslope to JA/EU and W. I was able to
model the antennas (checking incoming angles) for my 10 through 80 meter
antennas using the N6BV program since all the antennas are horizontally
polarized
and it appears as though those bands should be very exciting to operate.
However, on 160 I want to install a full sized wire vertical on a catenary
system
suspended between two towers. Assuming the ground is average and the
installation of 40 to 60 120 foot radials underground would there be any
advantage
or disadvantage to mounting it on the edge of the hill vs. a flat area?
Situation 1 has the vertical on the edge of steep rolling drop off from 830
feet down to the Pacific about 4000 feet away. Half the radial system would
be on the downslope, half would be on fairly flat land. Above ground radials
could be run on the downhill side to provide a "flat ground system", but I
really don't want to have to do that.
Situation 2 has the vertical about 250 feet further back on a plain and then
down the same drop off. All radials would be on pretty much the same plane
Looking up the mountain (Mauna Kea, 14000 feet high) in the other direction
I know will not do nice things for my signal going that way (VK,ZL) but I
can't do much about that.
Will the 1:5 slope going ot the ocean do any good...any bad? Will moving
the antenna further back from the slope help or hinder. I have no plans to
make it a four square since I don't have the room. My gut feeling is the
signal
will be attenuated somewhat going up hill and enhanced going down hill.
After living on the flatlands of FL, I am finding it is a whole different
world living on a mountainous terrain...as far as antenna design is concerned.
Thanks for the help.
Bill k4XS/KH6
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