Thought I would post this to perhaps help out others
Been using Channels for over three years without an issue - but over the last few weeks , I have had signficant issues with reception on my main OTA station broadcasting on High VHF channel 11
Signal Quality will go from ~90% to less than 70% Symbol quality will drop to 0-20%
I have traced the problem to a faulty LED fixture in my garage - my antenna is mounted in the attic directly over the fixture - maybe 3' away
Early summer , I installed a three lobed LED bulb in the garage to get better lighting - Worked great for several months and didnt cause any issues - however over the last few weeks I had occasionally noticed some flicker - Finally one of the lobes stopped working altogether. about this time the interference became a daily issue.
This fixture is the issue - I literaly could turn off the symbol quality of my HD Home run by switching on the light switch
I should have realized this was the problem - some time ago, I had issues with a cheap LED bulb causing interference with my garage door opener - they even sell special "garage door" LED bulb designed to prevent this interference.
Anyway - replacing the light fixture with a quality Phillips Brand LED bulb fixed it - Cheap LED bulbs are prone to this. Poor Build Quality. Phillips/GE and Cree are the three brands I have seen recommended for interference resistance