>Hi John, > >So why does the plate move with humidity? >Tis metal. So therefore the *frame* or support structure of the plate must >be moving and the plate is bending in response. > >Don Rose Almost! But if the plate doesn't bend and is raised on account of expansion of the area upon which it rests, then the near edge (right string) area will be higher from the bridge causing that string to be sharp. Don't draw me into a technical thing. It's just a thought for you to figure out. John Lillico, RPT Oakville, Ontario
This PTG archive page provided courtesy of Moy Piano Service, LLC