Hi Don For what its worth. The reverse crowned boards I have experienced had positive bearing not negative. This is... what I am curious about. Dale S. Erwin www.Erwinspiano.com Custom restoration Ronsen Piano hammers Join the Weickert felt Revolution 209-577-8397 209-985-0990 -----Original Message----- From: Don Hubbs <donhubbs at mwt.net> To: pianotech at ptg.org Sent: Tue, Dec 7, 2010 9:27 am Subject: [pianotech] inverted soundboard I decided to go ahead and give the ribs some clearance fromthe backpost. I used shims between the post and the ribs which did haveclearance to take a little of the pressure off and then took really coarsecloth-backed sandpaper and sanded a grove in the post to get clearance. Afterre-tuning, the piano does have better sustain and somewhat more volume. Thetone in the tenor and treble is quite clear with no false beats, so I don’tthink any wires are riding up the bridge pins. The bass is still rounder andnot as well defined as I would like to hear, but maybe that is a voicingproblem or just scale design. I think it is probably going to be a useableinstrument, but I am curious to see how stable it is. Thanks to all. Don Hubbs -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101207/abf3736b/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC