Recrowning - was Soundboard Crown measurement

[gordon stelter]

This brings to mind my suggestion a couple of years
ago about adding a thin, tough laminate ( maple
veneer,, 3 ply ? ) to extant ribs, with a flexed
"caul" atop, to recrown. Has anyone yet tried anything
like this ? On a "junker", for starts ? 
     Thump



--- erwinspiano@aol.com wrote:

>    Hi Ron
>    I read thru your post & I have questions. 
>     It appears that all the rib top paring down &
> prepping prior to gluing on extensions is done by
> hand. This I would find a bit tricky even with the
> piano upside down. Can more be said about the actual
> filing & fitting procedure prior the rib  glue up?
>   Also how much taller, approximately ,than
> originals were the final rib height.?  
>   Also what kind of time  does this job require?
>  
> 
>  
> 
> 
> With a 10 mm thick sound board panel, and the bass
> bridge being so close to the inner rim, this piano
> in original form didn't have much in the way of bass
> fullness for a 225 cm piano. In our customary
> manner, we have trenched the sound board panel just
> adjacent to note no. A1. The trench depth is 5 mm,
> half of the panel thickness.
>    Was the top of the panel thinned out at all? In
> my Mind 10 mm is very thick for any Sitka spruce
> panel. I've done this to some older Yamahas with
> very good results.
> 
> 
>   Thanks again 
>   Dale
> 
> 
> Ron O.
> -- 
> 
> OVERS PIANOS - SYDNEY
>    Grand Piano Manufacturers
> _______________________
> 
> Web http://overspianos.com.au
> mailto:ron@overspianos.com.au
> _______________________
> 



		
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