To combine the 2 antennas use a UHF VHF combiner , Pico Macom UVSJ. Here are places to buy antennas and etc. .
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.3starinc.com . . Aim the antenna at about 98 degree magnetic compass. . Read and understand this about , Real digital Tv Channels , Virtual Digital Tv Channels , Analog Tv Channels .
http://forum.tvfool.com/showthread.php?t=695