It's a very strange situation. There is one of the Siemens that is quite content in that slot and does not smoke. All bias fine and amp sounds great. A real mystery.
Cayin TA-30, Tube causing smoke
I recently purchased a quad of Siemens EL-34 tubes for my Cayin TA-30. For some reason, smoke keeps appearing from the #1 tube socket. It doesn't not matter which tube goes in there. It gets more bizarre, other tubes (the original Cayin's, Winged C's) do not cause any smoke. What could be going on here? Any other TA-30 owners experienced this? I have heard of JJ's causing this in other models. Any help is appreciated.