Pitch Raising to A440.......Or Not?

[David Love]

I'm not sure I agree with you.  Next time you string a piano, measure the
height of the plate strut over the bridge before you pull the tension up and
after.  Is that increase due to the plate rising as the tension is
increased???  The board (wood) is further depressed by the increase in
tension and the height of the bridge lowers reducing the tension and thus
the pitch.

David Love


----- Original Message -----
From: "Don" <drose@dlcwest.com>
To: <pianotech@ptg.org>
Sent: August 16, 2001 3:33 PM
Subject: Re: Pitch Raising to A440.......Or Not?


> Hi David,
>
> It is not the board(wood) but the plate that reacts instantly. That's why
> individually tied unisons drop *less* than looped (shared hitch pins), and
> why full perimeter metal plate pianos drop less than other designs.
>
> I do agree that deliberate overshoot to a pitch level higher than A440 is
> not necessaryily useful.
>
> At 02:10 PM 08/16/2001 -0700, you wrote:
> >I don't think it's necessary.  If you do a pitch raise to get the pitch
to
> >440 before you fine tune, the board reacts pretty instantaneously and a
> >further drop in pitch over time is not likely.  This is assuming they
tune
> >it again within a reasonable amount of time which, by virtue of the piano
> >being so flat to begin with, does not seem likely.
> >
> >David Love
> >
> >----- Original Message -----
> >From: "Farrell" <mfarrel2@tampabay.rr.com>
> >To: <pianotech@ptg.org>
> >Sent: August 15, 2001 3:36 PM
> >Subject: Pitch Raising to A440.......Or Not?
> >
> >
> >> I do a lot of pitch raises. Many are significant - 30 cents to 150
cents.
> >> These are pianos whose owner do not have the need of exactly A440. The
> >last
> >> few I have raised to A441 or A442 - figuring this will help speed
> >stability
> >> at A440.
>
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
>
> Tuner for the Saskatchewan Centre of the Arts
>
> mailto:drose@dlcwest.com
> http://donrose.xoasis.com/
>
> 3004 Grant Rd.
> REGINA, SK
> S4S 5G7
> 306-352-3620 or 1-888-29t-uner