Dear lists,
could anyone give me an idea of how an exhaust pneumatic coupler is
likely to work?
It seems to be quite simple, judging from the look of it, and I've even
been successful in attempts to get rid of some ciphers in it - but I
still don't really understand why it works! The organ is by Rühlmann.
Help would be appreciated - with a drawing if possible!
Many thanks
Barry
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