----- Original Message ----- From: "Farrell" <mfarrel2@tampabay.rr.com> To: <pianotech@ptg.org> Sent: September 18, 2001 2:15 PM Subject: Re: Tension Difference between 435cps and 440cps > Are you saying to rescale with A440 in mind, but keeping all tensions close > to that of the original design? That would mean using slightly thinner wire > for each respective note? > > Terry Farrell > A really good rule of thumb here--if you have any reservations at all about the structure of the piano, whether it be square, triangular or rectangular, analyze the original scale as if it were tuned to A=440 (because sooner or later it will be no matter what it says on the plate) and rescale dropping the overall tension by 5% to 10% (depending on your evaluation of the plate and structure. Make sure you don't have the tensions of any one section any higher than they were originally. Who knows--it might even sound better at the lower overall tension. Del
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