I finally attached my HDTV to the antenna that is in my attic and I am getting lousy results. Here is the story: The previous owners of the house mounted a 120" Radio Shack antenna in the attic. It can't be mounted outside because of the home owner association rules. For years it was unused. Actually, I didn't even know it was there. Previously, I had used some cheap rabbit ears and then I borrowed a Terk set-top antenna that a friend bought from BestBuy. I expected that the 120" antenna would be the best, but I was wrong. It was the Terk. Now I am confused. Any ideas why? Any suggestions on how to improve my reception. Some tech details: The antenna is connect via 50 feet of (black) coax from radio shack. I am in the suburbs between Ft. Lauderdale and West Palm Beach Florida.