Linlai E 6sn7 tubes

I’m assuming that was the issue.  When I turned the pre back on, I heard a pop,and shut it down. Waited a few minutes,turned it back on,an low volume on the right channel. Shut it down,waited a few minutes,switched tubes. Low volume moved to the left channel.   Waited again,pulled the Linlai’s out,swapped in the Psvanes, all is well.  I feel like a knucklehead. 

@rocray 

So the tube didn't blow?

Not totally I guess, It still produces sound, much lower,with some crackle. I shut it down before possibly harming my preamp.  The pre must have still been charged? I’m just really thankful I only ruined a tube. 

@rocray 

That's why I had to ask. You're probably right, the preamp circuit was still charged. You had me thinking the tube's filament was way too fragile.

I've done that by mistake with NOS and have never blown a tube or heard a bang, a pop, a sizzle....