Is A440 too much tension for old pianos? (was Old Bosie)

[Cy Shuster]

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
>
>
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