For reception down to and including KTPX-DT Real digital UHF Tv channel 28 , virtual channel number (44.1) ION Tv.
Install Above the roof a Winegard HD7698P antenna with a Antennas Direct CPA-19 preamp aimed at about 340 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing.html.
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.
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.
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For one Tv connection use no splitter.
For 2 Tv's connected use a , HFS-2D , 2 way splitter.
For 3 Tv's connected use a HFS-3D , 3 way splitter.
Buy at ,
http://www.hollandelectronics.com , also at ,
http://www.solidsignal.com.
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The outside coax is most likely water damaged.
Replace All outside coax with New RG-6 coax.
All outside coax is suspect of damage even if it looks Ok.
Check All coax and coax connections and etc. .
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The Tv/s Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels or "Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.
As always , trees and tree leaves do a real fine job of , reflecting , reducing , blocking , Tv reception and so do buildings and other obstructions.
Locate the antenna at a location that has the least amount or no amount of obstructions.