Partials change with tension?...was Verituner Spinner

[Isaac sur Noos]

Joe,

And we cant look at it without mention of the change in front
terminaison pressure and inclination of the bridge.
I've hear of a brand that use a system to hold back the  bridge when
strings are raised to pitch, to avoid the beginning of the "S" shape.

And I noticed large tone improvements after pitch raising when tuning
from 20 cts above, because (I suspect) of the bridge standing more
vertically with the help of the string's tension distribution.

I'll ask my friend Stephen Paulello about that specra question, but he
is very buzy building his grand, and other activities these days.

Best Regards


Isaac OLEG

Entretien et réparation 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 Joseph Garrett
> Envoyé : vendredi 17 octobre 2003 03:22
> À : pianotech@ptg.org
> Objet : Partials change with tension?...was Verituner Spinner
>
>
> Does anyone know, do the proportional relationships of the
> partials to the
> fundamental, and to each other, remain relatively constant as string
> tension is changed?
> Ron N
>
> Ron,
> One phenomenon I've observed, over the years of using an
> ETD, is that of the
> "Stretch" reading can/does change on a given instrument.
> This reading, is,
> of course, the harmonics of a given string. When pitch
> raising and sometimes
> even when doing just normal tuning, this factor changes! It
> is my suspicion
> that adding tension to a string will, in fact, change it's
> harmonics. I have
> not done, nor do I have time for such, any "scientific"
> studies on this
> subject. Just my observations over the years. I have
> thought that the
> moisture content in the sounding body has something to do
> with this, as
> well. At this point, just theories, on my part, but for
> what ever reason it
> does occur.
> Best Regards,
> Joe Garrett, RPT, (Oregon)
> Captain, Tool Police
> Squares Are I
>
>
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