action ratios

[Isaac OLEG]

Remember these are 1860 -70 or so pianos with original whippen.

I.O

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Richard Brekne
> Envoyé : vendredi 1 novembre 2002 22:44
> À : Pianotech
> Objet : Re: action ratios
>
>
> Hi Stéphane
>
> More parts of the puzzle to think about eh ? And this
> question was a fun one for sure. To be honest I havent
> really thought about exactly this question before.
>
> Perhaps if you sample some of our now standard parameters
> we might be able to see into how this may or may not fit
> into this whole question of  ratio and hammer mass.
>
> If you could give us the SW's, FW's WW's, KR, UW, and DW on
> say 10 sample keys we might have some fun with this one.
> And if you also could measure how far the hammer travels
> for 5 mm key travel (be very very accurate) that would be
> nice as well.
>
> I'm not so sure I'd buy into this being a voicing problem
> right off. I mean if the extremes are so very good then I
> have a hard time understanding that the hammers elasticity
> is involved. But I will ponder what others say with interest.
>
> Cheers
>
> RicB
>
> Stéphane Collin wrote:
>
> > Hi Richard, David, Bill, etc.
> >
> > I've been following the thread with much interest.
> > May I ask an innocent but pragmatic question (I think
> related to this topic) ?
> > More than often, I encounter this problem when rebuilding
> Bechstein pianos : I get the sound right, I get the touch
> feel ok, but the whole instrument always happens to be
> difficult to control, as the dynamic output switches too
> quickly from PP to mF (I mean :  the dynamic shades are not
> progressive enough.  Very soft playing is fantastic, very
> loud also, but progressively crossing from soft to loud
> happens to be difficult to control, as sound gets loud too
> quickly, which is musically not desirable at all).
> > How would you all cure this problem ?
> >
> > Thanks to all for great expertise.
> >
> > Stéphane Collin.
> >
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> UiB, Bergen, Norway
> mailto:rbrekne@broadpark.no
> http://home.broadpark.no/~rbrekne/ricmain.html
>
>
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