Mike, I am not sure where you find your information, but ALL of the
radiation of a T top vertical is vertically polarized assuming the T section
is balanced. The whole point of the T is that the horizontal portions of
the radiation cancel themselves out because they are 180 degs out of phase.
Providing loading but not distorting the vertical pattern and not using that
wasted horizontal energy.
An inverted L, while simple, is exactly the opposite. A portion of the
energy is in the vertical section and a portion in the horizontal section.
On 160M, whatever the length is of the horizontal section, its not desired
energy for DX work. Although it may actually be helpful as a more
all-around antenna for local and DX work for this reason.
The smaller the ratio of horizontal to vertical, the less this compromise
exists. However very few stations that say they are using an inverted L on
160 have 100ft plus of it vertical. Much more typical is 50 - 75 ft. And
the horizontal portion is usually longer, sometime a lot longer, than the
vertical portion.
Ed N1UR
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