Wierd Pitch Raise Results

[Stephen Airy]

How would you go about pitch-raising a piano that is
anywhere from 10 cents to 70 cents flat, but mostly
around 30 cents?  I pitch-raised my Ricca the other
day by overpulling some, going all through the piano
(and breaking C#1 (again) in the process) THEN
roughing in the unisons.  I then re-stripped the
piano, and tuned it the normal way.  The pins are
somewhat loose, btw.  Next time I need to tune it
(most likely will be 10 cents flat in a few weeks
cause that's usually where it is when I go to tune it
after that interval of time), how would you recommend
doing it?

I don't have an accutuner or a fork.  My dad has a $15
Korg chromatic tuner, accurate to within 2.5 cents,
and I made myself a CD with A-440 and temperament
octave tones (but without any inharmonicity factoring
in).


--- Patrick C Poulson <pcpoulso@pacbell.net> wrote:
> Terry: Check to see if the piano has a laminated
> sound board. In my
> experience a piano with a laminated board needs
> significantly less over
> pull.  I assume that this is because the board
> itself is stiffer due to the
> cross grain and layers of glue, and doesn't flex as
> much as a solid board.
> I also use a SAT, but in these cases I modify my
> pitch raise technique.  In
> the middle section, rather than tuning the unisons
> as I go, I mute off the
> strings, pull just the center strings up to pitch up
> throughout the tenor
> section, and then go back and pull in the unisons. 
> The upper treble and
> bass I tune as usually. This usually brings the
> pitch raise in as close as I
> typically get normally.  I also use this procedure
> on spinets and it works
> well on them too.
>     I hope this helps. Patrick Poulson, RPT
> ----- Original Message -----
> From: "Farrell" <mfarrel2@tampabay.rr.com>
> To: <pianotech@ptg.org>
> Sent: Thursday, February 07, 2002 8:50 PM
> Subject: Wierd Pitch Raise Results
> 
> 
> > Half the piano I tune require a significant pitch
> raise. I do a lot of
> pitch raises. I use a SAT III. Almost all my pitch
> raises come out really
> close to target.
> >
> > BUT. Some don't. Today I pitch raised three
> pianos. An Aeolian spinet
> (what junk!) was raised 30 cents - came out real
> close to target. A German
> F. Weber old upright - raised 80 cents and came out
> right on target.
> Yesterday I did 60-cent pitch raises on six P22s
> (and tuned them - new
> tuning output record for me! - also a new one-day
> income record for me! :-)
> !!) - all came out right where I wanted them.
> >
> > I also pitch raised a 1973 Kimball console today.
> The piano was all over
> the place tuning-wise, but was only about 5 to 10
> cents flat on average. I
> made the small pitch offset correction as usual with
> the SAT, and after the
> pitch raise pass, the ugly son-&%-$-$#%&@ was a good
> 15 to 20 cents sharp.
> WHY? I went through it again without any pitch
> correction (the piano should
> have ended up perhaps 5 cents sharp) and every thing
> was like at least 10
> cents sharp!
> >
> > Is this like some loosey goosey piano or what? Was
> I having an acid
> flashback? I takes a lot to get me riled up while
> working on a piano, but
> this one pushed me close to the limit.
> >
> > Ever see anything like this, or is it more likely
> that I was just tired
> and screwing up big time?
> >
> > Thanks.
> >
> > Terry Farrell
> >
> >
> >
> 


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