In the end you want to get the top antenna about a foot above the Jeep. If you don't then you will get as good of a signal.
What I do is in the city I run a 4' antenna. But when I go on the trail I run a 3' so I do not hit the trees as much. My mount is on the tire carrier. And on the trail I am not very far from the people I am running with.
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