evaluating sdbd. crown ...

[Delwin D Fandrich]

----- Original Message -----
From: Stephen Birkett <birketts@wright.aps.uoguelph.ca>
To: <pianotech@ptg.org>
Sent: Tuesday, September 21, 1999 10:14 PM
Subject: Re: evaluating sdbd. crown ...


> ....As explained above the reference for a differentially dried
> crowned board is not easy to define, and the meaning of "under
> compression" is necessarily ambiguous.
>
> Stephen

----------------------------------------------

For a compression-crowned soundboard panel, the reference state is its
physical condition and size at 3.8% (winter) or 4.0% EMC.  In the box.
Before ribbing.

Del
Delwin D Fandrich
Piano Designer & Builder
Hoquiam, Washington  USA
E.mail:  pianobuilders@olynet.com
Web Site:  http://pianobuilders.olynet.com/