[pianotech] Inverted soundboard

[Ron Nossaman]

On 12/6/2010 9:02 PM, Don Hubbs wrote:
> 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.

It's dead. If the soundboard is reverse crowned, it's already very 
thoroughly destroyed, and there's nothing real you can do to revive it. 
Replace the board, burn the piano, or CA an Ipod to the plate and 
download some piano tunes.
Ron N