Wurlitzer hexagonal soundboard

[James Grebe]

----------
> From: Marcel Carey <mcpiano@multi-medias.ca>
> To: pianotech@byu.edu
> Subject: Re: Wurlitzer hexagonal soundboard
> Date: Tuesday, April 29, 1997 10:07 PM
>
> At 16:52 97-04-29 -0500, you wrote:
> >
>
> >However, I am still stuck with this three-layered solid spruce
soundboard
> >concept that has the grain running in three different directions, then
> >glued together.  Is there anyone other than myself who has heard of this
> >concept as well?  Or is this the lamination type soundboard concept?
> >
> >Sincerely,
> >
> >Keith A. McGavern
>
> >Dear Keith,
> >The 3 plies in the soundboard are just the standard laminated veneers.
The
> >claim was that the vibration would travel in all directions equally
well.
> >Just a claim mostly to overlook the fact that the board will not vibrate
as
> >easily because it is much more rigid with 3 ply construction.
> >James Grebe from St. Louis
>
> Also not to forget that wood shrinks and swells only across the grain. So
if
> you have grain going across the others for the middle ply, you have much
> much more dimension change with humidity variations. That, for me,
explains
> a lot why these little buggers will move so much with humidity changes.
>
> Marcel Carey, RPT
Dear Marcel,
And to think they used to say because of the boards' rigidity it would not
swell so much due to humidity changes
James Grbe
>