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I don't see any difference in swr with my doors open,  parked under power lines, driving down the road,  etc. When I had common mode issues I had hell with all of this. Even the ground I was parked on made a difference with high power. Different swr on concrete vs dirt.


Even with the wilson mag mount on the work truck the swr is the same with the doors open or closed. If these little things make enough difference for concern I believe there is another issue.