12 cents

[Isaac OLEG]

I recently made a 1/4 tone PR, without the box, (as the batteries
where low) on a small vertical (Fazer is the brand). I leaved the
piano for one week and came back.

An interesting thing happens. The initial PR was a tad too strong and
I hade lo lower the pitch 4 to 6 cts.

While doing it , I heard that :
the tone that was awful and dead when I PR the piano, and did not came
sounding good while PR at 443 Hz env, begin to warm and color, and I
finally had a somewhat singing quality.

I wonder if the 1 week wait had allowed the tension to stabilise a bit
on the backscale, so when I had the pitch lowering the bridge tend to
stand up, giving then more front bearing to the string (at first the
piano sound like having a good lack of front bearing).

If so, it may be a good method to manage the PR from above.

I've heard that to avoid the bridge roll, some have begin to clamp the
bridge to the rim before bringing pianos to pitch when mounting new
strings.

Any similar experience ? (indeed the extra tension was also playing a
role in the lack of singing quality)

The owner (a professional jazz saxo player) was amazed by the tone
(final tuning with the VT100 of course).
He tells me that he heard how the instrument moved after the initial
PR, and tells me that the tone changed a lot.

Greetings

Isaac OLEG

Entretien et reparation de pianos.

PianoTech
17 rue de Choisy
94400 VITRY sur SEINE
FRANCE
tel : 033 01 47 18 06 98
fax : 033 01 47 18 06 90
cell: 06 60 42 58 77

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Don
> Envoye : mardi 1 juillet 2003 22:28
> A : pianotech@ptg.org
> Objet : 12 cents
>
>
> Hi Joe,
>
> With respect, your experience in pitch correction is
> not the same as mine at all. A piano that is moved 12
> cents will not be stable.
>
> The most recent example of this was a large old german
> upgright I tuned in England.
>
> I did a 27 cent pitch correction at A4. The tenor was
> somewhat flater and the last octave in the treble was
> 40 cents sharp. The piano was within 1 cent after the
> pitch correction, unisons were lovely and the octaves
> were very nice.
>
> The piano is equipped with humidity control.
>
> 24 hours later the pitch at A4 was 2 cents sharp and
> the tenor about 7 cents sharp. The mid treble was
> fairly stable but the top octave was again sharp--by
> about 30 cents. The bass on this instrument was
> slightly flat. There were also many unisons that had drifted.
>
> =====
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
> 3004 Grant Rd, Regina, SK, S4S 5G7
> Tuner for the Saskatchewan Centre of the Arts
>
> http://us.geocities.com/drpt1948/
>
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