DB-420 16 bay UHF folded dipole.

[W2NAP]

yeah way this harness is. the dipole interconnects are 75ohm rg-11 with a 75ohm N male/N female to connect the sets of 4 to make 8. at the end is a 50ohm n female where the hardline connects..

what I worry about is if I did swap the bay interconnect out to 50ohm it throwing off the impedance

[K7SGJ]

yeah way this harness is. the dipole interconnects are 75ohm rg-11 with a 75ohm N male/N female to connect the sets of 4 to make 8. at the end is a 50ohm n female where the hardline connects..

what I worry about is if I did swap the bay interconnect out to 50ohm it throwing off the impedance

That would certainly be a concern. I'm wondering why a commercial 400 MHz antenna would have 75 ohm components to join the sections. May it have been changed out at some time? The only other idea would be to put an antenna analyzer on it and see what the impedance at each connector really is, and then break out the abacus.

I have seen multi section antennas like that, where the top section is sold as a lower gain version of a two stage version, but have never messed around with them to see what the Z for each stage is. I'm sure that for combining them, the matching considerations were part of the design.

But then, I could be full of shit, too.