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Autopiano Action Pneumatic Span
By David Dewey

[ Howard Kohlbrenner wrote in 250804 MMDigest:

> I'm finding pneumatic spans between 1-1/8" and 1-1/4".
> The question is, what is the correct span?

Howard, I can measure one later today but, knowing the Autopiano
action, I doubt that the 1/8" difference in span will affect the
playing. Granted, it's not a good sign of quality rebuilding, but
being an 88-note player it likely has little effect (unless the
span is too little and it can't adjust to the pianos action).

David Dewey
Oroville, California
traindavidd@gmail.com.geentroep [delete ".geentroep" to reply]



(Message sent Wed, 6 Aug 2025 09:34:45 -0700 , from time zone -0700.)

Key Words in Subject:  Action, Autopiano, Pneumatic, Span