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 > > > > _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com.
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