Jeez, you'd think there would be a list of links to tube amp schematics compiled somewhere, wouldn't you? I'll bet maybe there are some lists around, 'cause I know there are lists of simple solid state amp schematics and stuff like that. Tons of tube radio schematics are available from Rider too.Check the list of "interesting links" on the vintage audio forum. I remember seeing some schematics in some of the links there.