Have been pretty busy of late Rod, and any open forum is not the best place to communicate (You really should let me have an email address!).

On the antenna discussions, so many folk seem to assume the mast is always the radiator, when in fact its more likely to be a couple of cable changing from it, and rarely is the relevant length the same height as the mast, thus rendering many of the layman's calculations.

Many engineers would vary the feeding paraemeters to alter the vertical pattern and thus the distance where the signal is reflected to ground, and so the coverage area.
Remember, you can make most lengths resonate at many frequencies - quarter wave is often not even the easiest to match.

Happy All Souls Day!