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Well, an FM trap does appear to have helped a little, in that I am able to get a few more channels to a viewable state in a single position of the antenna. A second FM trap in line seems to only reduce the signal strength a little across the board, with no other noticeable effects.
Last night's tests, with the FM trap installed and the C2V back in the bay window on the 3rd floor which seems to be the most universally usable space I have found so far yielded these results. I am only listing the channels I care about, and only bothering with the .1 variant of each for the time being.
KATU real channel 43 strength 40
KOIN real channel 40 strength 47
KGW real channel 8 strength 62
KOPB real channel 10 strength 72
KPTV real channel 12 strength 41
KRCW real channel 5 strength 32
KRCW real channel 33 strength 32
KPDX real channel 30 strength 32
It looks like strength 40 is pretty much the bottom cutoff for the channel to be viewable. Low 40s have stuttering and pixilation. Below 40 has 'digital signal found' but no picture. Interestingly, a reasonable few channels seem to like to hang out right at a power level of 32. While disconnecting and reconnecting cables, I found that KPDX for example shows 0 signal strength with nothing attached to the tuner, 32 and steady with the antenna attached, and it bounces between 32 and 0 with the coax connected to the tuner, but not to the antenna. KRCW is listed twice only because I want to receive one of those channels, although I do not really care which.
It seems weird to me that since these are all on the same couple of towers in the same direction that I am having the varying results that I am. For example, I would expect real channel 12 to have similar signal strength to 8 and 10, since they are all VHF.
Any further thoughts from anyone? I'm open to ideas!
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