[pianotech] Kawai UST-9 damper springs

[BobDavis88 at aol.com]

I am setting up a new Kawai UST-9 at a college. The piano sounds great, but  
the users complained about a heavy touch. It's the damper springs. I measured  
the spring tension with a Correx gauge, and in the bass it's just over 100 
(!!)  grams. This means the key downweight goes from around 50 without dampers 
to over  100 grams when the dampers engage. I'm going to weaken them, but I 
wondered if  there is a standard for this. Does anyone regularly measure this, 
and is there a  range that works? Don Mannino, if you're there, does the factory 
have a standard  for this? I remember your talking about damper springs 
lately, but I can't find  the email.
 
Thanks,
Bob Davis
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