You are really going to need a 2-antenna solution to see all your networks, but it isn't that difficult to make this work: your VHF stations lie in one direction, and your UHF stations lie in a different direction.
Use a Channel Master 4220 2-bay UHF antenna aimed at 8 degrees (due north of your location) mounted at the top of your mast for UHF, which will pull in CBS, NBC and FOX, and mount a Winegard YA-6713 four feet below the UHF antenna and aim that antenna at 310 degrees, as measured by your compass. This antenna will pick up ABC and PBS. Combine the signals from the two antennas into one cable using a Pico-Macom UVSJ antenna joiner, and run the cable to the antenna connector on our TV set. Be sure to ground your coaxial cable before bringing the cable inside your house: if you are using existing cable from your DirecTV installation, that cable is most likely already grounded. You will see all your major TV stations using that combination.
Once the antenna is connected, you'll need to go into the TV set's menu and have the tuner scan for channels. See the links below for information about the equipment.
http://www.channelmaster.com/product...D=37&catID=33#
http://www.winegard.com/kbase/upload/ya-6713.pdf
http://www.solidsignal.com/pview.asp...Combiners&sku=
http://manuals.solidsignal.com/AntInstallGuide.pdf