Read and understand this about REAL and Virtual tv channels.
http://forum.tvfool.com/showthread.php?t=695 . I suggest a Winegard HD 7082P All Channel Antenna pointed East because all the channels you will like receive are to the east. And go from channel 2 to 61. Put the antenna on the roof. The most often used roof type mounts are the tripod mount , chimney mount and the eave mount.
http://www.solidsignal.com ,
http://www.starkelectronic.com ,
http://www.amazon.com