HI
I have just changed my 70 cm repeater antenna over to a co-linear 8
dBd gain, was running 2 full wave dipoles stacked (reason..antenna
faults and not able to mount with correct vertical spacing).
When I was calibrating the circulator on the bench, all set up
perfectly, with the receive port being sharp in its setting.
On site since the antenna was running a slightly higher VSWR
compared to a dummy load (1.2:1), I thought it might be an idea to
just tweak the receive port to optimise the rejection. However I
found the tuning to be very flat, question, is this normal or am I
missing something?
73
Andy G3UEQ
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