Buck wrote:
Probably my first HF antenna as a novice was a 40/15 meter dipole
where 40 meters was 1/2 wave and 15 was 3/2 wave. I have never had a
problem dropping SWR on 15 meters to 1:1.1 with this antenna center
fed. However, as I understand antenna radiation on a wire, the
optimum point should be somewhere else along the wire to match the
impedance properly. I suspect it should be close to 1/3 of the way
from one end.

Any thoughts about this?

Think about it. There would be three current maximum points
on a 3/2WL wire. These three current maximum points correspond
to the low impedance feedpoints on the antenna. They would be
at 1/6, 1/2, & 5/6 from the ends. 1/3 from the end of a 3/2WL
would be a high impedance point, i.e. not a good feedpoint.
--
73, Cecil, W5DXP

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