Downbearing Guidlines

[RicB]

Hi David.

Most definitely. Thats whats going on the instrument to be sure.  But 
I'm also looking for thoughts about how much downwards pressure I want 
to create on the board... which is in the end directly related to the 
amount of tension I have on the stringing scale.

I have one strain of thought that says that around a 40-50 % deflection 
of the board is desirable.  I'm looking for thoughts on how much 
downwards pressure should be applied to a soundboard and why.

Cheers
RicB


Have you considered Pure Sound wire?

dp

David M. Porritt
dporritt at smu.edu

Hi experts out there...

Just a quick question I'm hoping for a few hints on.  Given a
soundboard that deflects from 4mm of crown to 1 mm of crown with 250 lbs
of presure spread over its surface roughly evenly....  what kind of
downbearing pressure should I be looking at achieving. Said another
way.... what kind of string tension should I be looking for.  The scale
I am working with is a very low tension scale with plain wire breaking
%'s around 35 %. with modern wire used as a base for figureing.  I'm
thinking that an increase to 45 % should be perhaps a minimum.  The
scale needs to remain quite low tension because of structual concerns..

Thoughts ?

Cheers
RicB