Loose ribs and delaminating plywood are all signs of a piano in a very dry climate, not a humid one. I've never heard of a soundboard inverting, and certainly not because of a very damp environment. It would seem that the soundboard would swell the opposite way, not collapse and invert. Once a soundboard has gone bad, there is nothing you can do to correct it. Bad glue joints seem to be an overall problem with Baldwin pianos. Here in Hawaii we have lot of hammers that are coming off moldings. Wim -----Original Message----- From: Don Hubbs <donhubbs at mwt.net> To: pianotech <pianotech at ptg.org> Sent: Mon, Dec 6, 2010 5:08 pm Subject: [pianotech] Inverted soundboard I have a 1990 Baldwin 6000 (52” upright) with an inverted soundboard. The piano was evidently in a very damp environment at one time, since there were several loose glue joints, including the bass bridge to apron and some plywood delaminating in the bottom board . The inversion is severe enough that the ribs near the center of the board are pushing against a back post. The tone is even but weak. Is there any way to flip the soundboard back to its original position without destroying it? Can I just remove some wood from the back post to give the rib clearance and expect that to enlarge the tone? Bearing can be adjusted because of the Accu-hitch pins. Thanks for any suggestions or prior experiences. Don Hubbs -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20101206/f3ce931f/attachment.htm>
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