Sorry folks, it's off the topic that I have intended: at the top of the thread I made reference to overload characteristics of a tube as an objective view. I did not intend it to be a taste test. I was hoping to see some feedback from experimenter/builders who have made new discoveries in the application of tubes in musical instrument amplifiers from a scientific standpoint. I am not trying to re-invent the wheel here and I believe that their is some characteristic of the tube that has yet to be discovered. If you wish, I am open to a private conversation.