Pitch Raise Sequence 160+ FLAT!!

[Charly Tuner]

Hi,

Yes, I did indeed suggest TWO pitch raises for the very reason you 
mentioned, but he didn't want to pay the extra money I would have charged 
for the time to do another pitch raise. He said \' "just do one and 
hopefully no strings will break". To my amazement, not a single string 
broke, and no false beats were created. It sounded very stable and clean.

Terry


>From: "Farrell" <mfarrel2@tampabay.rr.com>
>Reply-To: pianotech@ptg.org
>To: <pianotech@ptg.org>
>Subject: Re: Pitch Raise Sequence 160+ FLAT!!
>Date: Sun, 10 Sep 2000 23:00:57 -0400
>
>I have been curious about such a case. One third overpull starting from 170
>cents flat would be raising the pitch in the treble about 60 cents above
>standard pitch. I have been told (can't recall where or by whom) that one
>should not raise string pitch more than about 25 cents above standard 
>pitch,
>or there will be a risk of stretching the string so much that it looses its
>elasticity (or it goofs the steel up somehoworother).
>
>I would have recommended two pitch raises, I would set my SAT at 10 cents
>sharp (or even 20 cents sharp on such a new piano) and go through the whole
>piano once. It should then be about 40 - 50 cents flat. Then I would go
>through the entire piano a second time using the pitch raise function, and 
>I
>would never be overpulling more than about 20 cents.
>
>When a piano is that flat I will ALWAYS do two passes - not because of the
>risk of strings breaking (you can really pull a newer piano way over pitch 
>-
>don't ask how I know) - but because I don't want to exceed that 25 cent
>thing. Am I being cautious for a good reason?
>
>I suspect overpulling too much could even induce false beats by deforming
>the string (just my hunch). Does anyone have better info on how much
>overpull is Okey Dokey, and what can happen (besides breaking the string) 
>if
>that magic tension is exceeded?
>
>Terry Farrell
>Piano Tuning & Service
>Tampa, Florida
>mfarrel2@tampabay.rr.com
>
>----- Original Message -----
>From: "Charly Tuner" <charly_tuner@hotmail.com>
>To: <pianotech@ptg.org>
>Sent: Sunday, September 10, 2000 12:19 PM
>Subject: Re: Pitch Raise Sequence 160+ FLAT!!
>
>
> > I tuned a customer's 1975 K & C spinet yesterday...it was nearly OFF the
> > scale at 164 Cents Flat!!! I told the customer that even though the
>strings
> > are in good condition, that there would be a very real chance of 
>mutliple
> > string breakage, during the pitch raise sequence. He said to go ahead, 
>and
> > we'll hope for the best. So i computed the 1/3 OVER-pull in the treble,
>and
> > a little less in the tenor, then brought up the bass. NO broken 
>strings!!
> > The treble area was flatter than i have EVER encountered, at 163-170 
>cents
> > flat. Here's the neat part; I was able to get it close enough to fine 
>tune
> > after just ONE pass! I was astonished to see that the pitch dropped 
>right
> > into the ballpark across the board. So I finished the tuning, eased a 
>few
> > sticking keys, vacuumed out the piano, and booked another tuning in 6
> > months.
> >
> > Terry Peterson
> > Los Angeles, CA
> > Associate Member, PTG
> >
>
>

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