Soundboards: Thickness and Area

[Richard Brekne]

We asked him that and he said he didnt have time to get into that. I may be
going down there this spring for a week, so I will be able to find out that and
a few other things. I would suspect tho, that they are sanding in the immediate
vicinity of the edges they want to remain stiff.

RicB

Calin Tantareanu wrote:

> Hi Richard !
>
> Where ob the board does Steingraeber remove material from to get the sand to
> accumulate on the edges?
>
>  Calin Tantareanu
> ----------------------------------------------------
>  http://calintantareanu.tripod.com
> ----------------------------------------------------
> ----- Original Message -----
> From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: Monday, October 20, 2003 5:49 PM
> Subject: Re: Soundboards: Thickness and Area
>
> >
> > They spread dark sand on the panel and then pound a bit on the bridge to
> > see where the sand settles. They remove material from the soundboard
> > until the sand accumulates in a very clearly defined thin boarder line
> > about the edges of the entire soundboard. They are particularily
> > concerned with the K point area which corresponds to the area in the
> > treble where the so called killer octave phenomena occurs. But all
> > around the edge of the soundboard they want a precisely defined line of
> > sand.
>
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--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html