Install a Winegard HD7698P antenna above the roof , aimed at about 150 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Remove Any and All parts of the amplifier from the system. Remove the amplifier , remove the amplifier power supply. Here are some roof top antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html.
http://www.winegarddirect.com ,
http://www.solidsignal.com ,
http://www.amazon.com