Asimov wrote:
"Cecil Moore" wrote:
CM Helical antennas are not as efficient as
CM other forms of loading.

Considering that sometimes efficiency isn't quite as important, like
for example reception, are helical antennas less used simply because
the math is a little harder or not discussed enough?

Probably a collection of reasons. A high-Q loading coil in
the center of a vertical is much more efficient than spreading
the loading out over the entire antenna. Helical antennas are
hard to wind and are generally wound on PVC pipe which also
reduces efficiency and increases wind load. Even more efficiency
is lost without a good ground plane. If one doesn't compromise
on the ground plane, why compromise on the antenna? Most of us
old timers have tried helicals and given up on them - lots of
effort to achieve a poor performance.
--
73, Cecil http://www.qsl.net/w5dxp

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