thank you all for your explainations and Ghostrider45 in particular for your excellent detailed amplifier explaination. Paul
NOS, single ended, push-pull???
I am not sure what the following terms mean: what are NOS tubes? I see the term NOS often, it seams to imply to me that these tubes are superior. single ended and push-pull? Also, are all tube amps class A? What does the term "roled tubes" mean? Thanks for your enlightenment. Paul