Issue: The bassman sounded like the ocean. V1 (12AX7) is microphonic.  Replaced it, & ocean is gone, but loud humming & volume pot is really dirty-  De-Ox'ed all the pots. fixed issue

On the nice side, whomever replaced the caps did a very nice job.. with nice Sprague Atoms.  They're all still within spec.  It's still very nice inside. 

status: returned to customer