The second group of tv stations at about 173 degree magnetic compass , some stations are a stronger of signal strength. This group has , W16CO-D 16 Religion , WHTM-DT 10 ABC and RTV and AccuWeather , WHP-TV 21 CBS and MyNetwork , WITF-DT 36 PBS , WGAL 8 NBC is very weak and I do not think will be received. Report back with how the reception is of the groups of tv stations/channels. And I can better recommend a second antenna set up. Here is how to aim antennas ,
http://www.kyes/com/antenna/pointing/pointing.html , Here are places to buy antennas and etc. ,
http://www.winegarddirect.com ,
http://www.antennasdirect.com ,
http://www.solidsignal.com ,
http://www.amazon.com. Buy the antenna mount from SolidSignal or Ronard.
http://www.ronard.com