Topband: Shunt fed tower plus Marconi vertical phasing on 160 and80?

[Terry Posey]

...and reasonable instrumentation and a good understanding of what is
actually going on.  "Difficult" or "hard" is a judgment call from one's own
particular expertise and experience perspective.  Antennas are a wonderful
interest area of amateur and professional radio.  Experiment and enjoy.
Read good engineering books if you are interested in antennas.

73,  Terry K4RX

I don't know how deeply you understand directional arrays and networks, but
you could probably make it work with a couple T-network tuners and some
relays just by cut and try. It might take a little fiddling around listening
to signals, but there will always be a combination of what you could do with
a T network or two that would provide deep nulls.

It is more "cookie cutter" to use series fed quarter wave elements with
current feed (95% of people still do that wrong), but if you have a little
patience and don't mind experimentation, you could certainly make it work. I
phased dissimilar elements many times over the years, with the grossest
mismatch a "T" phased against a shunt fed tower. All it takes is parts and
patience. :-)

73 Tom