stability of pitch raises

[Richard Brekne]

Tvak@AOL.COM wrote:

> .........I suppose it's possible that the
> piano did all its drifting in the first 3 months, and just stayed there, but
> I'm starting to wonder about the conventional wisdom that a pitch-raised
> tuning is less stable.
>

You wont be the first to wonder about this...

> Could it be that the use of the RCT negates the instability issue by virtue
> of getting the piano so close to pitch after the first pass?

Doubtfull, at least not more then any reasonably well done pitch raise is capable
of. I think there are a lot of variables here that get into the picture to some
degree or another. Different pianos, condition, local climate, and age among some
of the more important ones.

I have always felt, and personal observation seems to bear this out, that a
stable environment will result in a stable pitch raise every time.

>
>
> Any thoughts?
>
> Tom Sivak

--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no