[CAUT] Gravalla Tension regulator

[Scott E. Thile]

Hello Ric and all,

The piece that is in there is intended to stiffen the belly rail, and it
works. My understanding is that it is under tension as opposed to
compression. It's pulled end to end as it holds the bell rail from pushing
out under the down bearing on the board. If you picture that it's easier to
understand it's size than if your thinking compression like the beams.

I don't know if it's as effective as the Gravalla device, but it seems
counter productive to me to remove that just to install the other, and
you'll not be able to put it back as it was originally without replacing the
board. It's mortised into the rim and belly rail underneath the board.

All the best, Scott
------------------
Scott E. Thile
Murray State University

> -----Original Message-----
> From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On 
> Behalf Of Richard Brekne
> Sent: Monday, September 24, 2007 3:15 PM
> To: caut at ptg.org
> Subject: [CAUT] Gravalla Tension regulator
> 
> 
> Hi Barbara... and yer others what responded.
> 
> I did read the article.. and with interest... especially 
> since I had an 
> idea of my own I put up a couple years back that I'll write a 
> separate 
> post on.
> 
> All this is nice and dandy... but what about the Resonator 
> itself... ? 
> and what about that smallish 1 by 0.5 peice of sugar pine or 
> spruce that 
> connects the rim to the belly rail ?  I'd kinda like some feedback on 
> the original queries as well... tho all this led to some nice 
> stuff mind 
> you.
> 
> Cheers
> RicB
> 
>     Hi Ric,
> 
>     Well, you might take a look at the August issue of the 
> Journal and test for 
>     weights or riblets on the soundboard.  Or have you 
> already tried that out?
> 
>     Remember that big 'ol Seiler grand I was wrassling with a 
> couple years years 
>     ago?  In October it's going to get at least one weight or 
> riblet in the 6th 
>     octave which is wimpy.  I tested by clamping my small 
> Vise-Grips on the 
>     bridge pins and the sound came right up.
> 
>     Barbara Richmond, RPT
>     near Peoria, Illinois
>