I changed antenna and I found that conneting directly to the transceiver SWR on all bands are almost null.
When I connect in series to the transceiver my linear SB-220 SWR dramaticaly increase (eg. >3:1 on 10 meters).
The linear is OFF so only the linear antenna relay in the "rest" position is involved.
Any one has an idea of what could be the cause and (still better) the cure ?
73 de I0MOM Marco
in sunny Rome