[pianotech] Interesting action on Yamaha YUA

Ryan Sowers tunerryan at gmail.com
Tue Jul 7 09:34:57 MDT 2009


Yes, the hammer "rise" is simply caused by the jack pushing up on the butt.
The butt leather appears to have a more rounded profile which probably
helps. The jack springs don't seem any stronger than on a traditional
action. I think it works partly because the hammer is closer to its balance
point but far enough from the strings where the return spring offers little
resistance.

-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net
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