So as to get rid of problems , get rid of ALL and I mean ALL amplifiers , preamplifiers , amplifier power supplies , power injectors and any thing else that has any thing at all to do with amplifiers. With one coax connected from the antenna to one Tv with NO splitters , Set the Tv to scan for --> Digital Broadcast Tv Channels. NOT cable Tv Channels and NOT Analog Tv Channels. If the Tv will not receive Digital Broadcast Tv Channels. Then a converter box is needed ,
http://forum.tvfool.com/showthread.php?t=380. . Aim the Tv antenna at --> about <-- 230 magnetic compass. Here is how to aim Tv antennas ,
http://www.kyes.com/antenna/pointing/pointing.html Turn the the antenna to the left and right for best reception. All this information I have put so far is not the final answer ,this information is to stop you from chasing your tail. This information is to get you going on the right track. . Look inside all connectors on the ends of the coax , is the foil shied and shield wires pushed in toward the center conductor?? The center conductor is what carries the signal , is one or more of the shield wires wrapped around the center conductor?? If so push the foil shield and shield wires away from the center conductor. If a shield wire is wrapped around the center conductor then remove the shied wire from the center conductor. Are there any metal flakes on the foam that is in between the center wire and the foil shield/shield wires?? If so , remove the metal flakes. And I agree with Tower Guy , and I will take it even further , there are way too many people that think they know about Tv reception with Tv antennas and do not have clue one , are only concerend with their own self image and give out bad advice.