Welcome back Bob:
Here is a new report done by zip:
http://www.tvfool.com/?option=com_wr...51349678732b63
It isn't as accurate as a report using your exact address, be we will start with it.
There is no simple way to combine your three antennas, because the signals from the 3 antennas will interfere with each other at the combining point. It is possible to do it if you have a LOT of money and the technical knowledge to do it.
I suggest you use just one antenna, #1 the RCA ANT751 or #3 150-mile amplified antenna, and aim it in the best direction and be happy.
If you must have two directions, aim #1 in the direction with the strongest signals, and aim #3 in the direction with the weaker signals. Use an A/B switch to select which antenna you want to connect to the TV antenna input. You will have to rescan after each change of direction unless you have a Sony TV that can add a channel after scan so that you don't have to rescan.
If you don't have a Sony TV and you don't want to rescan after each change of direction, connect one antenna to the TV antenna input, and connect the other antenna to a separate tuner like a converter box. Connect the output of the separate tuner to the aux input of the TV and select which antenna you want by changing the input switch of the TV.
You can extend the idea to 3 antennas by having two separate tuners.