It took a lot of going back and forth, but I have an EZNEC simulation of a
75/80 m antenna that has an swr below 2.0 from 3.5 to 4.0. If you do put
up
the 4.5 antenna, you can probably use that to extend the bandwidth of the
80
m antenna on the high side.

Tam/WB2TT


Could you post what the antenna looks like that will do that bandwidth ?

de KU4PT