I'm assuming the 1/4 wave on 160 would be about 130' which would be a half
wave on 80 and that they would have to be fed via different networks.
Has anybody done this? Does the shunt fed tower work in a phased array
situation, or would I be better off just using the insulated tower as a
Marconi single element vertical?
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
All good topband ops know how to put up a beverage at night.
_________________
Topband Reflector
