On 1/12/2026 3:48 PM, Richard (Rick) Karlquist wrote:
the well established principle that elevating a vertical doesn't work
very well in the first place, no matter what is done to feed it.
In a study of the height of vertically polarized antennas that I
published in parallel to the one on horizontally polarized antennas, I
showed that there CAN be benefit to modestly elevating quarter-wave HF
vertical antennas. The study looked at typical roof heights for single
family homes. The The benefits are on the order of a few dB -- reduced
ground losses and lowering the angle of maximum field strength.
Making the antenna a half-wave improves the vertical pattern by raising
the height of the current maxima, just as elevating quarter-wave
vertical does. And the end-feed arrangement used for half-wave wires
would likely work just as well (although we might not like the vertical
pattern when operating on harmonics).
There's another reason my feed arrangement could be useful -- rigging
from a single support, like tossing a rope over a tree limb. I like to
show methods that give folks more options, depending on their real estate.
73, Jim K9YC
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