On 1/13/2025 6:05 PM, RONDALL SPENCER wrote:
Im building a 160 meter vertical out of rohn 45. The tower will be sitting on a
hill side vertical with the ground sloping about 15 deg going down towards the
west. Burried radials. How will this effect the transmit angle pattern
Several years ago, the fine antenna design engineer Tom Schiller, N6BT,
has done extensive research on verticals, including the effect of
sloping terrain. He has presented results of disciplined measurement of
a vertical near a a drop-off, showing that it strongly improves low
angle radiation in the direction of the rolloff. In general, the closer
to the drop-off, the better. I think he did this work at frequencies
well above topband, but it's likely to carry extend down there.
73, Jim K9YC
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