Tough OTA situation - UPDATE AFTER TESTING
 

Previous thread explains situation. Here are my charts:
25 ft:
http://www.tvfool.com/?option=com_wr...46aed17730e0fc

40 ft:
http://www.tvfool.com/?option=com_wr...46ae061936eb8f

60 ft:
http://www.tvfool.com/?option=com_wr...46ae9aa12cd4ea

100 ft:
http://www.tvfool.com/?option=com_wr...46ae8a8f599451


Today I did testing in the attic with the following set-up (extending the pole on the roof did not change results):
Antennas Direct 91XG
Antennacraft Y10713
RCA TVPRAMP1R preamplifier

The results were OK (5 channels with a total of 18 subchannels). The only major station we got is CBS (the channel 51 version at 170 degrees not the channel 39 at 205 degrees). So we ended up getting real channels (not the virtual channel numbers) 33, 42, 46, 50, and 51. Now all of theses are at the 170 degree mark except for real channel 50 which is at 205 degrees and it is 100% signal quality and 75% signal strength on my TV.

Here's the big question: Channel 50 has the same origin as the transmitters for ABC, CBS, NBC and more. Why am I not able to get these other stations if I get channel 50 so well? The NBC channel has the same point of origin and higher power but it doesn't come in.

Any ideas on why this is happening?

I'd be happy to get NBC and ABC and call it good.