Hey all; None of my EE classes cover vac tubes since they're largely obsolete. The thing is, for my senior design project (I have a year or so, no rush.) I'd like to build an audio amplifier. From experience I know the advantages of vac tubes and am willing to put up with the drawbacks. I was wondering if you know of any extremely good texts that cover tubes from top to bottom. I know nothing about them and will have to teach myself completely. IE a book covering a tube as an extension or special case of another element won't do. Help? Thank you.