Yes, having a component ATSC tuner is advantageous to have around. I have an off brand Tivax that I have used to test reception and test if it's an internal TV tuner issue. Does the TV you are using allow manual channel input or allow for testing of signal strengths across all channels?
Being able to see if you indeed have a signal on WTOL is the next important step.
If a signal is there, but just below threshold I may consider ordering a bandpass filter. Essentially, instead of blocking FM which is what you are doing now, I'd try to knock everything down except the H-VHF frequencies.
With the bandpass, you'd be doing your best to knock down all the hash. You would likely lose all UHF and the Y5-7-13 would become exclusively for WTOL. A second antenna would have to take care of your other signals along the line of a Antennacraft HBU11 or the more expensive RCA ANT751.
If the signal isn't there, the Y10-7-13 may be your next step.
Once you establish reception, then you can finalize plans for configuration.
The bandpass would be something like this:
http://www.summitsource.com/pico-mac...1-p-10401.html
(others might have a better approach on this piece of equipment
Once you establish reception, a channel master join-tenna might be an option. For $3.99, this would allow you to combine two antennas into one lead.
http://www.channelmasterstore.com/JO..._p/cm-0581.htm
http://www.solidsignal.com/pview.asp...na-%28hbu11%29