Tuning, adjusting antenna

ABC (vhf 7) and NBC (uhf 12) not tuning well. In attic, took netbook and used dtvsignal app to tune antenna position (ssh into fatso mythbe server, dtvsignal running on fatso).

Ch, Network, RF ch, compass heading, strength_before, strength_after
11.1, NBC, 12, 291, 55, 66
7.1, ABC, 7, 295, 38, 66
5.1, CBS, 29, 295, 73, 74
2.1, FOX, 44, 295, 70, 74
9.1, PBS, 30, 295, 66, 72
54.1, PBS, 50, 321, 76, 64

So, uhf50 went down but gained 12 and 7.
All of above stations now lock in successfully with no glitching :)

Note, I have uhf antenna and ABC is now rf=7 VHF.
Still have radio shack vhf antenna patched in, but did not adjust it.