Pitch Raise Sequence

[Joe & Penny Goss]

Hi Terry,
You have too much time on your hands. You think too much <G>
I think you have said that you use a SATlll like myself.
In my use of the tool, it depends on how flat each section of the different
bridges are as to how the piano gets pitch raised.  Example
If the bass is only slightly flat ( 15 cents ) it will be tuned after all
tenor strings are tuned directly to the tenor note an octave above, by ear.
The tenor strings will most times be tuned with a 25% overpull and one
sometimes two settings of the pitch raise function at an octive apart.
The trebel string break is where I sometimes use the overpull of 33% , but
only if the piano is over 75 c flat at that point and no other change is
made from that point to C88.
I have tried the quicky pitch raise in the upper trebel ( just moving the
pin a tad ) and always get in trouble with raising it too high and spending
another three passes bringing it back down to pitch.
If you try the 88 down try it with the 33 overpull as the string will most
likely drop at least 45c.
Joe Goss
PS and BTW my new design levels are now in production and ready to deliver.
----- Original Message -----
From: Farrell <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Saturday, September 09, 2000 8:37 AM
Subject: Re: Pitch Raise Sequence


> Oops, no, I never pitch raise tenor bass strings, my expressed concern was
> regarding tenDer bass strings.
>
> Terry Farrell
> Piano Tuning & Service
> Tampa, Florida
> mfarrel2@tampabay.rr.com
>
> ----- Original Message -----
> From: "Farrell" <mfarrel2@tampabay.rr.com>
> To: <pianotech@ptg.org>
> Sent: Saturday, September 09, 2000 8:56 AM
> Subject: Pitch Raise Sequence
>
>
> > I have wondered repeatedly why I don't start a pitch raise at C88 rather
> > than A0 (everytime I answer "great idea, try it next time - I never
have).
> I
> > use a SAT III and rubber/felt mutes for pitch raises. Most pianos that
> need
> > a pitch raise are flattest in the top couple octaves. The top couple
> octaves
> > is where the risk of string breakage is greatest. Also, when one is
> raising
> > pitch, the tension of the remaining strings drop an additional amount
> before
> > you even get to them (my experience is that if the hi treble is 50 cents
> > flat before starting a pitch raise, by the time you get to it after
> raising
> > the bass and tenor, the hi treble will be perhaps 80 cents flat) thereby
> > increasing the risk of string breakage.
> >
> > Take the common situation where the bass is say 20 cents flat, tenor 30
> > cents flat, treble 40 cents flat, and hi-treble 50 cents flat. Start
> raising
> > pitch in the hi-treble and progress toward the bass. Would I not find
> > advantage in giving the piano a more even pitch raise (rather than
raising
> > pitch 20 to 80 cents (bass to treble), I would be raising pitch perhaps
50
> > to 30 cents (treble to bass). Just plain old happier for the piano
> overall,
> > and much less chance of strings breaking.
> >
> > One of the advantages this may offer is when pitch raising on an old
risky
> > piano. I hate the thought of raising pitch on bass and tenor, just to
get
> to
> > the treble and find that strings are breaking right and left. If strings
> are
> > going to not be able to take A440, you will find out right away if you
> start
> > at C88 (of course then you are faced with the occassional problem of
tener
> > bass strings! - although in my experience that is less common).
> >
> > So now you ask why do I not try it and report back. I will. But before I
> do,
> > does anyone think this idea has any merit? Has anyone else tried it or
do
> > this regularly?
> >
> > Terry Farrell
> > Piano Tuning & Service
> > Tampa, Florida
> > mfarrel2@tampabay.rr.com
> >
>
>