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Is your bias properly set? The calibration may be off.

It has been said that setting the bias too high will dramatically shorten tube life. I have found that to be true (Flash/Bang, tinkle). I found out that bias creeps up, so you gotta re-bias the amp as the tubes warm up, and get the final, long-term setting when it's nice and hot.

I'm guessing your CJ uses red lights as bias level indicators. Perhaps they are improperly calibrated, or have drifted?

Might be worthwhile to try a set of the CJ Sovteks. If they pop, you have the expensive satisfaction of knowing you were right and CJ was wrong. Makes me think of what I want on my gravestone - "I TOLD you I was sick!"



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