There is a problem causer for your reception location and that is , WTIU-DT channel 14 PBS , the signal strength is , Over The Top Strong , it is high lighted red , Pwr(dbm) -9.7 and 81.2 NM (dB).
Using a preamplifier for reception of the - Many other weak signal strength Tv stations/channels - is contra indicated because the over the top strong signal strength will over load a preamplifier and be the cause of bad or no reception of several channels.
The simplest way , but not the only way , to deal with the issue is to install a long range antenna , A Winegard HD7698P antenna with - NO Preamplifier - aimed away from WTIU.
The group of weak signal strength Tv stations/channels at about 22 degree magnetic compass , is a convienet way to do this because the antenna needs to be aimed at that group to get stronger reception of those weak signal strength Tv stations/channels.
This situation also means that the very directional HD7698P antenna will most likely not receive the any of the Terre Haute or Louisville Tv stations/channels.
A second antenna will be required to be installed , more about that later.
If you do not have a Strong and Sturdy antenna mount.
Install a Strong and Sturdy antenna mount above the roof , here are some Strong and Sturdy antenna mounts.
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.html.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com.