Guitar Amp and Effects Schematics Archive
I bought a CD of amp schematics at a flea market about 10 years ago and I've been using it ever since. The schematics were probably originally stolen from Schematics Heaven, but the last time I looked they were down. I just copied the files to my hard drive, wrapped some html around them and set them here. I hope someone finds them useful.
Guitar Amp and Effects Schematics Archive