If the antenna is a ANT751 , channel 7 thru 13 , 14 thru 51 antenna , I recommend turn the antenna around and aim the antenna at about 300 degree magnetic compass. The ANT751 is not designed to receive channels 2 thru 6 in the VHF tv low band. Here is how to aim tv antennas ,
http://www.kyes.com/antenna/pointing/pointing.html