Is your amp auto bias? If not you may have to check the bias as it may be way to high.
tube smoke-caused by what??
I just recieved a quad of el34s from another A gon member today. I installed them and after 4 minutes of so, smelled something nasty, I went over to the amp and one of the tubes was smoking. The insides were not all lit up like when tubes burn up. I shut down the amp and reistalled the other tubes and eveything is ok. What would cause this? Each tube has a reading on the tops with a black marker, but only 1 tube smoked so I doubt that it was the marker burning off.
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