Thanks for the tvfool report. It is more promising than the first one going by KING NBC real channel 48 which is the weakest that you will probably want.
Ah, 98503, thanks. I ran all the zips and that was the closest, but it didn't quite match your image report.
Most of your signals are UHF real channels; many at 10 to 13 degrees magnetic. You will probably need to aim for NBC. There are 2 VHF-High channels: KCPQ Fox real channel 13 is at 342 degrees magnetic, and KSTW CW on real channel 11 at 13 degrees magnetic.
You might try a Winegard HD7694P VHF/UHF combo aimed at 10 degrees magnetic to see how it does on one TV without a preamp. If the signals are too weak after splitting, you can add an indoor distribution amp or an outdoor preamp, but not both.
http://www.solidsignal.com/pview.asp...enna-(hd7694p)
http://www.skywalker.com/catalog/Manuals/WIN1051.pdf
2Edge signals need a little more antenna gain; I hope the 7694 has enough. The next step up is the 7697.
The coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge, but the system will not survive a direct strike.
You have some strong FM signals that might cause interference to TV reception; see attachment. You might need an FM filter.