I just wanted to say thank you to everyone for helping me understand and solve the Comcast issues. I went the route suggested by blust2 and purchased the WineGuard antenna and splitter from Home Depot.
And isn't the HD glorious! The clearness of the picture amazes me! I'm back to the point where I can record my tv shows, and the occasional Letterman or Leno episode for the musical guest. This is mainly what I need right now. I never had 100's of channels, so I can continue to live with what I have.
I'm just working on positioning the antenna, as once in awhile I get the digital glitches from the signal dropout. I think I can make this all work fine though.
Surely it will be a happy day when I return the cable box back to my Comcast office! They are in a tiny 2-person storefront in a very low key, almost unmarked, building. They sit behind a counter and 2 inch thick glass, like a secure bank. They aren't the friendliest bunch of people!! Zoom and crop picture??? HMMMM, no sir, that's YOUR tv!! I guess they are mainly there so the older population of the town can pay their bills in person. Or maybe there is some town law that requires there to be a physical office in the towns they support?