Sorry to hear of your issue. I am going through something similar with one of my tube mono blocks right now. I don’t live in LA, but I believe that George Meyer in the LA area, or Brooks Berdan, as suggested above are well respected repair shops. Probably going to be using their services myself.
Tube amps...they sound great, but boy are they a real PITA when it comes to the number of failures that can occur...and their overall reliability and robustness.
Tube amps...they sound great, but boy are they a real PITA when it comes to the number of failures that can occur...and their overall reliability and robustness.