Just switched on my crack this morning, and after a few seconds my Tung Sol power tube made a loud pop with a visible white spark inside. I immediately turned off the amp and inspected the tube. It looks fine, and after turning it on again it seems to run fine. However, I'm now worried that this tube has some integrity issues that could lead to damage to my crack w/ speedball. I'm also worried about the pop happening when I have headphones on and having my ears blown out.
I just bought this tube recently and have used it for less than 10 hours. Should I contact the seller? Should I stop using the tube?
Of note, leading up to this event I've had ongoing issues with this particular tube in terms of sound. Commonly, there's a phenomenon in which the right channel becomes very "hollow and airy" and is suddenly incredibly sensitive to any vibration. I believe I've heard this termed microphony, unsure though. I was always able to resolve it by tapping on my desk, or lightly on the amp itself. I imagine I was vibrating something back into place within the tube.
