As long as everything is still in balance between your channels, the bad tube didn't take anything with it. New production tubes go bad just as often as NOS tubes, and some defects are hard to find until the tube has full operational voltage applied to it. Always purchase tubes from reputable dealers(with stringent test procedures) to avoid the occasional high-dollar, NOS counterfeit(from China, etc.).
Damsel in Distress with Jadis DPL
Caught the tube rolling bug and acquired a pair of 12AU7 "supposedly" NOS Phillip Mullard collaboration tube along with a RCA 12AX7 for my Jadis DPL preamp. Experienced a loud crack from left channel through my loud speaker. Left speaker went completely dead. Removed all 3 tubes and re-installed original compliment. Everything is back to normal. Or so it seems. What happened? Did I do any damage? Any comments welcome ~ Deb