Dynaco Schematics
SCA35 Pre amplifier
Schematic (bad scan), (Dynaco)
ST70 Power amplifier
Schematic, (Dynaco)
Check out Bob Latino’s Dynaco Manuals Page for lots of free Dynaco manuals.
Or check out Greg’s Unofficial Dynaco Page for lots of Dynaco info and links.
See Curcio’s Audio Engineering Dynaco Doctor Page for Dynaco spare parts and replacement boards.