For those of you interested in learning more about your amp

[what_wires]

I came across this informative link. It has a lot of good information for both novices as well as a refresher for those with more experience.

http://www.allaboutcircuits.com/vol_1/index.html

[zaphod_phil]

This is a great theoretical electronics resource, and covers very similar ground to university electronic engineering course modules. It even has a chapter about tubes (in the Semiconductor section of all places)!
www.allaboutcircuits.com/vol_3/chpt_13/index.html

Thanks for sharing that!

[Raja]

A big Thanks for posting this... very good reading!

[WaZaK]

"Solid State: A component that has been specifically designed to make a guitar amplifier sound bad. Compared to tubes, these devices can have a very long lifespan, which guarantees that your amplifier will retain its thin, lifeless, and buzzy sound for a long time to come." (allaboutcircuits.com/vol_3)

Lolololol! (Thanks for the link ZP.)
Very interesting potted history of the "valve"