I'm definitely into tubes. I haven't heard a phono stage without them yet that I'd take over my current one with them.
Plus 1 to Folsom.
Emil, although not mentioned in typical component specifications, there are other forms of distortion
than harmonic distortion. Surrounding circuitry quality is also important factor in creating distortions.
RCA Radiotron Designers Handbook, by 26 engineers, mentions at least 6 types of distortions, a couple
more not listed.
Typical SS devices produce higher harmonic distortion, and odd orders, than triodes, both without negative
feedback.
Another example, the huge size electrolytic filter capacitors are just one external part that causes distortion.
And it is difficult to measure some types of distortion.
cheers and all the best.
steve
