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Thanks for the excellent replies. I will work on your suggestions one by one and hopefully find a solution.
"Ordinarily, a grounding block is not required for an indoor antenna, but strong signals can bypass any filters and directly enter the TV cabinet if the coax isn't grounded."
I've not installed a grounding block ... yet. Will do so next.
"It could be FM interference to VHF"
I have installed an FM filter as well as the LTE filters.
"Loss of the pilot can be caused by multipath reflections. "
This may be the most likely problem.
"Is the channel WBRA?"
Yes
"Unfortunately, your DigiAir meter isn't going to be able to do much for you since you really need to be able to see the spectrum with a much narrower bandwidth around channel 3. It appears to only allow a spectrum display of its full channel span."
I am making arrangements to borrow a spectrum analyzer.
"Is the problem constant, or related to certain times of the day?"
The problem is constant, but there have been random windows of reception in the evening hours.
... how far away is the channel 3 transmitting tower? "
I'm approx. 50 miles from the transmitting tower.
"Getting the antenna out of the attic and up into the air would likely do wonders."
I constructed a folded dipole antenna for Channel 3. It works great at a different location. However, at this particular location, moving it around the yard produced the same results as the big Winegard in the attic ... great signal but the BER would not lock.
I'll continue to work on the dilemma and report back.
I really appreciate all of the input.
Bob
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