Thanks Paul. I also found this doc to be useful as well, back when I wanted to research the anatomy and function of a typical SET amp. This also includes many of the scientific strategies and practical analysis of the tube amp, which also produces tangible conclusive results.
http://www.next-power.net/next-tube/articles/Cheever/cheever.pdf
I must admit, even though I'm not a fan of tube amplification, this document was very eductional regarding the practical applications many of today's tube amp manufactors use to test their products before release to the market.
This is just one of many available. I'll see if I can find more and post them.
I'm glad to see there is more than one person who is into education regardless of how much experience one has.
Good looking out Pauly! : )
Enjoy!