I do have a Winegard LNA-200 which is connected just off my ClearStream 4V antenna. I have tried bypassing it but didn’t get any channels when it was disconnected. It’s actually mounted onto the antenna mast.
I don’t know if Tablo support checked to see what dB gain was hitting the tuners. They’ve been remoted into my unit more times than I can count. Both first and second level support have been in my system many times and said they don’t see anything out of the ordinary on it.
I guess I could try an amplifier with lower output and see what happens.