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Actually Richard,you bring up a good point that I had not thought about. After reading your post I got to looking at some info I have and you are correct. I stand corrected on this. When driven at very low levels it is possibe for the amp to become unstable and generate parasitic oscillations and damage the tubes/transistors.I was only thinking about grid drive levels and dissapation ratings as well as changeover switching.

[QUOTE="Captain Kilowatt, post: 111331, member: 39"] Actually Richard,you bring up a good point that I had not thought about. After reading your post I got to looking at some info I have and you are correct. I stand corrected on this. When driven at very low levels it is possibe for the amp to become unstable and generate parasitic oscillations and damage the tubes/transistors.I was only thinking about grid drive levels and dissapation ratings as well as changeover switching. [/QUOTE]

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