thomasmnile wrote:
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You could add a Wingman antenna (made by Winegard) to the Sensar to improve reception if you have a problem, or replace the antenna with a Jack Antenna. The Jack is available from a multitude of places online, and can be bought as a replacement head only for the mast mounted Sensar or as a roof mount model that completely replaces the Sensar antenna and mast.
The Wingman addition if far superior to the Jack across the board: UHF or VHF. Unless there is a space constriction on the roof where you can't fit anything else, a Jack simply does not perform as well.