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
appreciated.

Jim Quashnock

 [ See the discussion and drawings in "The Orchestrion Builder's
 [ Manual and Pneumatics Handbook", available from the author,
 [ Craig Brougher <craigbr@worldnet.att.net>  -- Robbie