Hi Conrad Actually, I kind of like Ron N's ideas about how the bridge swelling contributes to this issue. I leave it to him to describe it tho. RicB Conrad Hoffsommer wrote: > At 22:27 03/11/2002 -0800, you wrote: > >Just a general question from a relative newbie... What usually causes a > >piano to sharp between tunings? Going flat is completely understandable, > >from the string streching and/or pin loosening points of view, but what, > >other than maybe temperature or frame flexing, can make a piano go sharp > >over time? > > > >Thanks > >Greg Casper > > It must be spring wherever you are. > > you have... > -soundboard with actual crown > -Humidity up > -wood swells, increases crown > -increased crown pushes up on strings > -string tension (and pitch) go up. > > reverse process in october... > > Conrad Hoffsommer - Decorah, IA > Usually I try to take it one day at a time, but lately several have > attacked me at once... -- Richard Brekne RPT, N.P.T.F. Bergen, Norway mailto:Richard.Brekne@grieg.uib.no
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