[pianotech] SnS M

[Ed Foote]

I have found, in quick-fix situations, a small drop of pvc-e glue on the Teflon post will quieten the spring clicks. Just smear it on the spring/post gap.  Doesn't seem to affect spring action. 


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



-----Original Message-----
From: Susan Kline <skline at peak.org>
To: pianotech <pianotech at ptg.org>
Sent: Wed, May 23, 2012 11:14 am
Subject: Re: [pianotech] SnS M


              Yes, unfortunately that is original. They changed over to the    plastic/delrin/whatever a few years ago. The first I knew of it was    trying to get a click out of a repetition in a rental D. I chased it    down to the coil whacking against that post. 
    
    I believe I heard the suggestion from a Steinway person to twist the    coil of the spring to get rid of this, Personally, I prefer the old    system, which if I remember right was bushing cloth with a center    pin through it. Damper cord would probably work -- it certainly has    held in plenty of springs in other actions. 
    
    It seems to me that people designing pianos have a fond illusion    that just because teflon is low friction, it's also quiet. But it    does not absorb or deaden sound at all, nothing like the action    cloth or bushing cloth it replaces. (Think of all the tiny little    squeaks from spinet and console damper springs when they stopped    putting in the cloth lining at the end of the lever and just sprayed    on green teflon.) Since the noises which get going with it take    awhile to show up, presumably the designers continue to think that    teflon is noise-free. 
    
    Susan 
    
    On 5/23/2012 2:29 AM, David Boyce wrote:    
            Wow, if that's some kind of thin pllastic rod,        surely it can't be original?  
        
        Surely too there is some risk of noise arising from the working        of the spring coils against the relatively hard surface of the        plastic?  What should be in there is Flange Cord, the correct        material.  It's a special material with a braided sheath        covering a bundle of threads inside.  I will try and send a pic        shortly.
        
        Best regards,
        
        David.
        www.davidboyce.co.uk
        
        
Thanks Wim,
          Here is the pic for the plastic cord.
        
       
    
  
 
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