I live in Rhode Island and have been receiving Boston OTA stations for past few years. I recently returned from vacation and now the signal that was in high 70's low 80's is now in the 50's and I get none or limited signal. All the stations are at 37 degrees and about 32 miles. One station at the 32 miles and 37 degrees work fine with 80 signal strength the other 4 50's. I do use an amplifier, the antenna is on a rotor in the attic. My first thought was lightening static may have fried amplifier but then I would not be getting any boost. I'm getting about 30+ boost. Is it possible all 4 stations reduced their power? Any thoughts or suggestions?