You got it sorted- good work!
My recommendation, if not already offered, is to look for an NOS 6V6 on eBay or the like, made by RCA, Sylvania or the like, for use in this preamp.
A 6V6 arcing as you describe is a bit unusual but does suggest to me that it might have a construction problem, one that I've seen in modern-era tubes (being either Russian or Chinese). An older tube I suspect is far less likely to do something like this, even as it ages and eventually dies.
Happy Listening!
My recommendation, if not already offered, is to look for an NOS 6V6 on eBay or the like, made by RCA, Sylvania or the like, for use in this preamp.
A 6V6 arcing as you describe is a bit unusual but does suggest to me that it might have a construction problem, one that I've seen in modern-era tubes (being either Russian or Chinese). An older tube I suspect is far less likely to do something like this, even as it ages and eventually dies.
Happy Listening!