Recrowning - was Soundboard Crown measurement

[Erwinspiano@aol.com]

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In a message dated 11/27/2005 8:42:41 A.M. Pacific Standard Time,  
Erwinspiano writes:

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.




 

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