My tube amp (Jolida 102b) has been working well. It is about a year and a half old and the tubes may have about 500 hours on them. I was checking the bias yesterday, which was a bit high, when one of the output amps began to "smoke." It got hot enough to melt some of the graphics/writing off, and now has a surface deformity where it, apparently, melted a bit.
Is this a tube issue, or a larger issue with the amp itself. Is it safe to operate?
Any help is greatly appreciated in advance.
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