It would think a blown antenna or major coupling component. One PA would not take a whole site down. The big question is where is 147 sitting? If it's where 40 was, then that eliminates an antenna. It would be just as effective to use the antenna/coupling site 147 is using for site 40. Another possibility is the site 40 control cards. It is interesting for sure. Speculation leads us all over the place.Not to mention why the Toronto site has gone offline, with a temporary one in it's place. Curious it would die so soon. I had noticed the RSSI on Site 40 had been greatly reduced before going offline entirely. I wonder if a PA failed or something?