Wow, that's amazing: both that RCT was so accurate in predicting overpull for such a large pitch raise, and that the pins were still snug... Thanks! --Cy-- ----- Original Message ----- From: "Hechler Family" <dahechler@charter.net> To: "Pianotech" <pianotech@ptg.org> Sent: Tuesday, January 06, 2004 11:16 AM Subject: Re: Is A440 too much tension for old pianos? (was Old Bosie) > Cy, > > I just had a tuning call for a Thiebes-Stierlin Cabinet Grand (upright) > (~1919) that was at least 100 cents flat. I just set Cybertuner to the > widest pitch raise setting and started from left to right going as fast > as possible. The first pass was just to get the strings close to pitch - > the bi-ads (right string) and tri-ads (left & right strings) pulled up > but not necessarily "tuned". On second pass, readjusted Cybertuner for > normal pitch raise and took a sampling. (Amazingly, A-440 read A-439.59) > and continued. By the end, the piano sounded great. Of course, as > always, I told the customer that the pitch raise, being that for off, > will hold for awhile. But because of the settleing it will have to do, > it will need another couple of tunings before it stays. Also, > suprisingly the pins were pretty snug - didn't find one sloppy pin - > which I thought was amazing for it's age. > > Duaine > > Cy Shuster wrote: > > >I'd like to know whether any pianos can't take the tension of A440 ("A435" > >cast into the plate is a good sign, I understand)... > > > >The complications I refer to are those during a pitch raise, where bringing > >strings up to tension affects the pitch of strings you've already tuned. > >Obviously you have to do two (or more) passes, but what's the best sequence > >to get to stability fastest? (I should have looked in the archives first). > > > >--Cy-- > > > > > -- > > Duaine Hechler > Piano, Player Piano, Organ, Pump Organ > Tuning, Servicing & Rebuilding > Associate Member of the Piano Technicians Guild > Reed Organ Society Member > St. Louis, MO 63034 > (314) 838-5587 > dahechler@charter.net > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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