I just got myself a mc34-ab, my first tube-amp. Tesla NOS EL34's and I use it as a power amp. Sounds wonderful, driving my Zu Druids. Source is a Resolution Audio Opus 21 CD player that includes a good pre. I use the Opus as a DAC, and I feed it from a PC's hard drive through a M2Tech - HiFace (better sounding than using the CD-player!). And also there is a simple monster + MCintosh filtering setup for the AC power. That's my system.
Now it has blown tubes for me two times:
First time - the two mid-sized (driver?) tubes, now replaced to my satisfaction
Second time - the two right-most (seen from the front) EL34's. Cold and non-glowing but still there in the sockets the amp sings even better...
So here are my questions:
Can I remove the corresponding EL34's for the left-channel, to see if sound improves there too, or is that a hazardous experiment
Previous owner had no issue with tubes blowing during two years of ownership, why does tubes blow in my ownership?
FXbill, please if you have the schematic, I'm interested to have a copy, and I'll go for the mods you propose.