Hello all, A 1983 Yamaha YUA (52" upright) just arrived this past week. It is an intriguing piano. It has the radial bracing in the back, agraffs in the bass and tenor sections, and an action that I have not seen before. It lacks the traditional hammer return springs and instead has an unusual set of return springs attached to the player side of the damper stop rail. The springs are flat, about 1/8" wide and do not engage the hammer butt until the hammer is about 5/8ths or so from the strings. When the hammer is in check, the spring has very little pressure on the butt and the hammer is close to its balance point. The result is when the key is slowly released the hammer rises slightly out of check like you expect in a grand action. The repetition is very good, and it trills very nicely. It feels lighter, due to the fact that there is no hammer spring resistance at the beginning of the key stroke. Hopefully the picture will help this make sense. I'm wondering if anyone else has had any experience with this style of action? Ryan Sowers, RPT Puget Sound Chapter Olympia, WA www.pianova.net -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090705/0ed78a7f/attachment-0001.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: yamaha yua action 2.JPG Type: image/jpeg Size: 926648 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20090705/0ed78a7f/attachment-0001.jpeg>
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