[pianotech] FW: what is this?

[Gregor _]

David,

exactly that. Obviously your German is better than my English :-)

This wondrous technique was discussed in a German forum, too. The question was if that is not a little bit too esoteric. But Stefan Knüpfer is not known for esoteric stuff, he believes in physics. A German collegue wrote that his grandfather used that procedure too (but not with a jig saw but by hand). In the end nobody was able to explain why it should work, but some claimed that it works. Whatever working means in this context.

Gregor

------------------------
piano technician - tuner - dealer
Münster, Germany
www.weldert.de


From: firtreepiano at hotmail.com
To: pianotech at ptg.org
Date: Fri, 30 Sep 2011 07:50:54 -0700
Subject: Re: [pianotech] FW: what is this?







My reading of the German is that he is speaking to freeing up a stuck 
system. He had a piano that had not been played in a long time, and his sense 
was that the soundboard, etc., would not move freely until it had gotten used to 
moving again. Breaking loose the grain. Overcoming “sticktion.” Car engines and 
suspensions will sometimes act stiff until they are driven a while.
 
Sounds like loose logic to me, but if he got results, it is worth 
pondering.
 
David 
Stocker, RPT
Tumwater, WA




 

From: John Formsma 
Sent: Friday, September 30, 2011 05:59
To: pianotech at ptg.org 
Subject: Re: [pianotech] FW: what is this?
 
Yeah, 
right. :) I'm not agreeing that you can put energy into a soundboard with a 
tennis ball. I mean, yeah, you can, but it comes right back out. Just like when 
a hammer hits a string. Nothing gets stored like in a energy reserve. 
 
-- 

John Formsma, RPT

Blue Mountain, MS
 
 
On Fri, Sep 30, 2011 at 4:18 AM, Gregor _ <karlkaputt at hotmail.com> 
wrote:


  
  Here is a cutout of an interview with Stefan Knüpfer about that 
  question:
Basicaly it says this in English:


Why to use a 
  tennis ball in a grand?
Long time no play, piano is like sticked in the 
  mud, it needs energy to move and swing free again. The idea is to put energy 
  into the soundboard not via the action but from above with the aid of a 
  tennisball of a jig saw. It knocks the piano beautyful soft and it gets a free 
  tone.
   
  		 	   		  
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