The coupler will not work correctly with 110 ohm radiators on the ends of odd
quarter wave 75 ohm multiples.
It is meant to work with close to 50 ohm antennas (preferably 1/4 wave
at the end of odd quarter wave sections of 75 ohm cable.
Your elements and set up are probably problem with your array.
> I the question is can it handle radiators with
> abt 110 ohms impedances? Books say nothing.
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