I live in Gardena, CA. We’re probably 35 miles southwest of Mt. Wilson and the other transmitter sites for broadcast stations in the L. A. area, VHF and UHF.
This last week, stations 2 (KCBS) and 9 (KCAL) have both had very poor reception on our three TV sets, all connected, with Y couplers, to the same aerial. None of the other stations is apparently affected. I have replaced the aerial, the coaxial cable, the Y couplers, the other fittings–even part of the mast. We never used to have this problem.
I can make some dark accusations here–Channels 2 and 9 are owned by the same media entity–but I would prefer to find a simpler, and more plausible, cause to ascribe the problem to.