I have actually come across a piano with reverse threaded pins, which means that if the string has a tendency to unwind the pin, the pin digs in deeper into the block to arrest it. Now how about that for ingeniousity....... However the piano was still a semi-tone flat!!!!! AF ----- Original Message ----- From: "Alan" <tune4u@earthlink.net> To: "'Pianotech'" <pianotech@ptg.org> Sent: Sunday, March 27, 2005 9:01 PM Subject: Aha! was flat facts > And herein lies the interesting crux of my whole question from the > beginning: We have guesses, suppositions, and opinions but, apparently, > really don't know why pianos get flatter and flatter and flatter over > time. > Seems like this question is so basic that experiments would have been done > long ago and we'd have a definitive answer. And maybe, who knows, some > ideas > for building more stable pianos. > > I still go with turning pins, though. There is a natural, sustained > tension > on the pin from the string that would love to turn the thing > counter-clockwise. Earth tremors, children thudding across the floor, > sonic > booms, moving the piano, and hovering ufo's would all put vibration into > the > system, however briefly, and the pin could jiggle just a a third of a > skinny > hair each time. But over the years ... > > Alan R. Barnard > Salem, MO > > > -----Original Message----- > From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On > Behalf > Of Ron Nossaman > Sent: Sunday, March 27, 2005 11:38 AM > To: Pianotech > Subject: Re: was flat facts > > > >> I don't really buy into the "tuning pin turns" theory. > > Me either, nor the wire stretching. Music wire doesn't continue to > stretch over time unless it's tensioned at it's yield point - then > it stretches, necks down, and breaks. > Ron N > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.8.3 - Release Date: 03/25/2005 > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.8.3 - Release Date: 03/25/2005 > > >
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