I am rather confused by some otherwise helpful terminology that has
been posted.  My Reproduco is the typical instrument with 2 ranks of
pipes under the keyboard.  Since I deal with pipe organs regularly,
I am reading this post literally.  For example:

> ... the organ has a set of large bass pipes on the back so it
> would need a large blower;

These are nothing more than "8-foot Stopped Flute" pipes -- as common
as dust around pipe organs.  A fractional horsepower blower is what is
needed.  Though noisy as hell, small Kinetic blowers can often supply
other vacuum and pressure from one unit.  American Fotoplayer and
Robert Morton used Kinetics on their photoplayer and style 39 or 49
theatre organs.

> If your Reproduco has 2 ranks of pipes in the piano and an octave of
> pipes attached to the back of the piano, then you don't need a large
> blower. However, it does need to reach a pressure of about 6 inches
> water gage.

This is exactly what Art Reblitz told me about my theatre model
Reproduco, "About 6 inches."

> The tubular pneumatic action needs 2 inches higher pressure than
> the pipe pressure in the wind chests. As I recall the pressure for
> the pipes was about 4 inches. My instrument was in my living room
> so I wanted it much softer and so I ran it as low as the pipes would
> speak.

Now this is where the terminology seems to get sidetracked.  My
instrument uses vacuum for the tubular pneumatic action.  I have no
idea what the vacuum, not pressure, is supposed to be.  If the pipe
and ventil action is on _pressure_ of 6 inches, what should the vacuum
be for the tubular pneumatic and stack action be?

The blower, vacuum pump and reservoir are missing on mine.  I am going
to use a small fractional blower for the pressure, an OSI regulator of
the smallest size, and a variable vacuum unit.  All will be remote in
a nearby closet with needed sound absorption. Certainly not original,
but at least it will get the machine playing.

Tom DeLay
Salinas, California