I have couple of books which may be of interest: - [B]"Valve Amplifiers" by Morgan Jones [/B](probably the best practical book on understanding and building valve amps) [URL]http://www.amazon.co.uk/Valve-Amplifiers-Morgan-Jones/dp/0750656948/ref=sr_1_1?ie=UTF8&qid=1300220319&sr=8-1[/URL] and [B]"The Art of Linear Electronics" by John Linsley Hood [/B](this one is pretty rare, the author probably needs to introduction! Very interesting and includes curcuits of classic Quads etc) £15 each + £3 postage.
