It depends on your skill level. If you're a beginner, then I would start with Dave Funk's Tube Amp book, Gerald Weber's 2nd book Tube Amp Talk for the Guitarist and Tech, and Gerald Weber's DVD about repairing and working on amps. Weber's books are good and have lots of useful tips, but he is also a salesman and often will try to sell you things in his articles and books so keep that in mind if you read something. Another good one would be Dave Hunter's book(s) on amps.
As you get some basic knowledge about amps, then you can graduate to more complicated stuff. Kevin O'Connor's The Ultimate Tone (TUT) series of books are excellent for a more skilled amp builder and have tons of useful info in them, although they are a bit spendy. I'd start with TUT3, then get TUT1, TUT2, TUT4, TUT5 in that order.
You can also find some great books online for free. Anything by Norman Crowhurst is very good, but a bit technical for a novice. You can get most of the books from Antique Electronics in Arizona. (
www.tubesandmore.com) I'd also suggest to read Randall Aiken's excellent series of articles on his site. (
http://www.aikenamps.com/TechInfo_2.htm)
Check out the links.
www.londonpower.comhttp://www.kendrick-amplifiers.com/http://www.freewebs.com/valvewizard/index.htmlTheres a site where a bunch of old Navy books on tubes and amps are scanned and available for free, including some of the Norman Crowhurst stuff, but I can't find the link at the moment.
Greg
