Hello Agiera,
In looking at your TVfool plot in regards to the big four, NBC and FOX from Harrisburg are no sweat with the existing J-Pole satellite mount. CBS, ABC and PBS are going to pose a bit more of a challenge and would need an antenna larger than the J-Pole mount supports.
If I were at your location, I would focus on Baltimore. The main reason is due to magnetic heading 161/166 you have pretty much of Baltimore's broadcasts within 5 degrees of each other. The other markets have signals all in different directions. Baltimore while weak, gives you a chance for the big four plus some in one heading.
I would do a two antenna application for Baltimore. Signals are weak, so you must have a robust antenna system. First antenna I would install a A
ntennas Direct DB8.
http://www.solidsignal.com/pview.asp?p=db8. Orientate to magnetic heading 163. The DB8 is a UHF design that'll give you great performance for real channels 14 and up.
The second antenna I would install would be an
Antennacraft Y10-7-13.
http://www.solidsignal.com/pview.asp...-7-13&ss=42123. Also orientate to magnetic heading 163. The Y10-7-13 is a high-VHF exclusive antenna that is designed for real channels 7-13. This important for WBAL and WJZ.
You need to purchase an signal combiner. The
Antennas Direct EU385CF-1s is a nice little unit. This allows you to combine two antennas into one coax coming into your home.
http://www.solidsignal.com/pview.asp...CF-1S&ss=42125
Mount the antennas on your roof either via chimney mount or tripod mount. Mounting supplies:
http://www.solidsignal.com/cview.asp...ing%20Supplies. When installing antennas on the same mast try to use a 10' mast. Install DB8 on the top and 4' below install Y10-7-13. Have combiner below Y10-7-13.
I would choose a location on your home that has the best possible pathway with as few obstructions as possible to magnetic heading 163.
I couldn't give you "easy" and repurposing you satellite mount. Getting the signals you want takes a bit more than "easy." Thus, I had to give you a stronger system to get you all the channels you wanted.
You didn't mention how many TVs you wish to serve. Depending on the number, that could create a few more recommendations. How long do you anticipate your coax runs being?
For starters though on your roof with this system I would have a reasonable expectation to see ABC, CBS, CW, FOX, NBC and PBS from Baltimore.