Some months ago Comcast scrambled the OTA Broadcast signals that were coming over their cable if you used them for internet.
Bought this
antenna from a friend and installed it where my old satellite dish was mounted. Pretty easy, since I was able to use the cables from that installation. It has a remote control for pointing the antenna, so is very easy once it is on the roof.
I got it used for $20. It is available new at amazon for about $70. I get 59 digital channels when pointed towards Orlando. Unfortunately, I have a partial obstruction that blocks NBC. I could move it to a higher point on my roof, but it would be more trouble than it is worth.
It has a smaller footprint than the satellite dish it replace. Very happy with results.