Forum and schematic links
Communities and forums
http://www.thegearpage.net/board/
http://music-electronics-forum.com/
http://www.el34world.com/Forum/index.php
http://www.ceriatoneforum.com/
http://www.brownnote.net/forum/index.php
http://www.18watt.com/index.php
Schematics and layouts
http://www.schematicheaven.com/
http://www.freeinfosociety.com/electronics/schempage.php?cat=1
http://www.ampwares.com/index.asp
http://www.fender.com/support/amplifier_schematics.php