The amp experiences crackling and noise just before it actually cracks (breaks) the glass envelope on 1 of the 6L6 power tubes!
Is this a common issue that results after a while, it is a 1996 amp. Is it a solder joint to foil issue because of heat? Is it a Bias issue going wild? Is it a design issue? Is it an inverter tube driver issue? Or something else? All information would be appreciated if you have seen this happen and what was your fix or correct fix for the problem. Thank you.