Soundboard backposts ??

[Garold Beyer]

>From VOL. 9, No. 11 PTG Journal, Nov. 1966, page 18; an article on
rebuilding a Baldwin C.
 " From here on it would seem the battle was over, but upon stretching some
string across the bridges and over the duplex scaling it was discovered
there was insufficient downbearing.
 This we overcame by cutting some valve springs from a Caterpillar tractor
engine I happened to have lying around the shop, ............The two springs
were wedged between the soundboard and posts at a position directly centered
under the bridge thus producing the crown. We ended up with a little more
than a quarter inch of crown, and after the piano was strung we had good
downbearing. The subsequent tone was so good that I hated to  see the old
piano go."

 I have no further comment.
Garold Beyer

----- Original Message -----
From: Richard Brekne <richardb@c2i.net>
To: <pianotech@ptg.org>
Sent: Wednesday, December 01, 1999 5:04 PM
Subject: Soundboard backposts ??


> Hi list..
>
> Got into a discussion today with another piano tech which prompted me to
> put the following question to you experts out there.
>
> Given an old beater with a flat soundboard, perhaps a bit of negative
> crown... What would the effect be of glueing in wood pieces between the
> ribs and the back frame beams to force and hold the soundboard into a
> artificial crown ??
>
> sounds off the wall, I know... but I am curious to hear your responses.
>
> Richard Brekne
> I.C.P.T.G.  N.P.T.F.
> Bergen, Norway
>