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MMD > Archives > October 2007 > 2007.10.07 > 05Prev  Next


Replacing Autopiano Action with Welte Action
By Bruce Clark

The biggest problem in making this replacement would be the top action
(pneumatic stack).  The bottom mechanism probably would not be a prob-
lem.

The divisions between the breaks in the top pneumatic stack would be my
biggest concern.  The other is: Will the Welte stack fit precisely in
height and width?  Usually not.

I once encountered a technician who was very proud that he finally 
accomplished replacing a top pneumatic stack.  Somehow he did not real-
ize the bass section was one note short.  When it played, the bass was
a half-step off from the mid-range and treble.  Since he was tone deaf,
he did not hear this. I told him he could re-tube it to play correctly,
but he said it sounded fine to him.

Bruce Clark


(Message sent Sun 7 Oct 2007, 11:16:05 GMT, from time zone GMT-0400.)

Key Words in Subject:  Action, Autopiano, Replacing, Welte

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