[pianotech] Interesting action on Yamaha YUA

[Ed Sutton]

It appears to be caused by the jack pushing back under the hammer butt.
I'm wondering if the timing of the jack is a little different from the usual.
ES
  ----- Original Message ----- 
  From: Ken & Pat Gerler 
  To: Ed Sutton ; pianotech at ptg.org 
  Sent: Tuesday, July 07, 2009 9:19 AM
  Subject: Re: [pianotech] Interesting action on Yamaha YUA


  I watched the video clip on youtube and it looks like the hammer is acting like there is a repetition lever action of a grand in the operation. Did/does the hammer spring pull the hammer forward?

  Ken Gerler
    ----- Original Message ----- 
    From: Ed Sutton 
    To: pianotech at ptg.org 
    Sent: Monday, July 06, 2009 9:38 PM
    Subject: Re: [pianotech] Interesting action on Yamaha YUA


    Ryan-

    What is the effect on pianissimo playing?

    Ed Sutton
      ----- Original Message ----- 
      From: Ryan Sowers 
      To: pianotech at ptg.org 
      Sent: Monday, July 06, 2009 9:59 PM
      Subject: Re: [pianotech] Interesting action on Yamaha YUA


      I uploaded a little video clip to youtube showing how the repetition works. I have also realized that the action needs no perceptible lost motion to function well. Sorry the quality isn't better. 

      http://www.youtube.com/watch?v=hyubzuhi2bY

      I discovered I could eliminate the noise of the spring by needling the escaine (it seems like escaine) with a chopstick voicing tool. It can conveniently be done without removing the action. 

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