Hi, Vic:
Tim is right. If you are lucky, if you can get your antenna high enough, and if there are no trees or buildings in the signal paths, you
might get PBS, Fox, and ABC; CBS and NBC would be even more difficult.
You would need a Winegard HD7698P antenna and a Channel Master 7777 preamp.
The consumer rotators aren't too reliable with big antennas. You should consider a ham rotator.
consumer grade:
http://www.solidsignal.com/pview.asp?p=cm9521a
Your TV should be able to add a channel after a scan or you will need to rescan after a change of direction.
The coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge, but the system will not survive a direct strike.