I just replaced the full complement of tubes in a small Single-Ended Triode amplifier I have. This is a 6L6 - based amp (self-biasing design, Chinese-made - like so many so-called "high-end" audio nowadays), and one of the ouput tubes quit on me.
I replaced the Chinese 6N3 input tubes with G.E. (JAN) 5670W tubes and the power tubes with JJ 6L6GC tubes. The difference in sound quality is quite astounding - so much so that it sounds like a completely different (and much better) amplifier. I ascribe much of this improvement in sound quality to the JJ 6L6GC tubes - clean, crystal highs that makes my toes curl!
So... question: I know I can run KT66 tubes on this little SET amplifier as well. Does that mean that I can run 6L6GC tubes in my ST-70 (probably biased lower) as well? Like I say, the 6L6GCs just sound so damn good!
Best regards to all
'Jan in BC, Canada