[pianotech] found it was hammer return noise

[reggaepass at aol.com]

It was a bit counterintuitive to me to have   the repetition lever so high but it works.
Maybe I missed something here, but wasn't Ed recommending LOWERING the repetition lever so there would be MORE contact between the top of the jack and the rep. lever, not RAISING it?


Alan Eder


-----Original Message-----
From: Gene Nelson <nelsong at intune88.com>
To: pianotech at ptg.org
Sent: Tue, Mar 2, 2010 9:00 am
Subject: Re: [pianotech] found it was hammer return noise


 
  
----- Original Message ----- 
  
From:   Ed Foote 
  
  If, by why, you mean, why does it   eliminate the knock, I think it is because of friction slowing the jack's   speed at the final stop, and the closing geometry effectively letting the jack   return be stopped by the button as well as by the knuckle.  
Regards,   

  
Ed Foote   RPT
http://www.uk-piano.org/edfoote/index.html
    
  
  
  


  
  
As the knock that I hear is   induced by merely depressing the key only 1mm or 2, the jack does not move off   of the button. The jack tail does not get close to the let off button and the   hammer only rises slightly and falls to rest, avoiding contact with the rest   rail, followed by a woody knock. Sort of a static situation for the jack   wouldn't you say?.
  
It was a bit counterintuitive to me to have   the repetition lever so high but it works.
  
I had not considered that the jack stop felt   button could have a dampening effect in a static situation like this but it   must.
  
As others have pointed out, during regular   playing when the key is fully depressed, the jack - under certain conditions -   can reset with enough force against it's button to create a noise. Making   adjustments to slow the jacks return helps reduce or eliminates this   noise.
  
Thus my dilemma.
  
Regards,
  
Gene

 
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