Pitch Raise Sequence 160+ FLAT!!

[Joe & Penny Goss]

Hi again Terry,
Don't know for sure but have you ever tuned some new pianos right out of the
box that the bass strings were a fourth sharp. Some seem to do just fine and
then one or two strings will be a little funky but there is no way to tell
if they would have been that way if they had not been stretched way beyond
where it would seem logical to be their limit.
Joe Goss
----- Original Message -----
From: Farrell <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Sunday, September 10, 2000 9:00 PM
Subject: Re: Pitch Raise Sequence 160+ FLAT!!


> 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
> >
>
>
>