I have two vacuum driven instruments: an orchestrion and a Reproduco
organ. Neither one has a vacuum regulator, only a motor speed control
for the vacuum pump. This is hardly a regulator.
I'd like to build a functional, but simple vacuum regulator, or pick up
two used ones cheap. Any help on either of these topics would be
[ See the discussion and drawings in "The Orchestrion Builder's
[ Manual and Pneumatics Handbook", available from the author,
[ Craig Brougher <email@example.com> -- Robbie