noisy grand dampers

[Isaac sur Noos]

Teflon powder with a brush  from below the noisy dampers .

Or/and scratch once with a very thin blade inside the double wedges.

Isaac 

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Isaac OLEG
accordeur - reparateur - concert
oleg-i@noos.fr
19 rue Jules Ferry
94400 VITRY sur SEINE
tel: 033 01 47 18 06 98
fax: 33 01 47 18 06 90
mobile: 033 06 60 42 58 77
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> -----Message d'origine-----
> De : pianotech-bounces@ptg.org 
> [mailto:pianotech-bounces@ptg.org]De la
> part de A440A@aol.com
> Envoye : mardi 23 decembre 2003 13:15
> A : pianotech@ptg.org
> Objet : Re: noisy grand dampers
> 
> 
> Clyde writes:
> 
> <<  a 1993 Kawai KG-2A grand<>the client asked if anything
> could be done about what I would call a type of
> whoosh as the sustain pedal is depressed.   I used CLP on 
> all the guide rail 
> bushings, and that seemed to take care of that noise, but I 
> think the other 
> will not go away until the part of
> the trichord dampers that goes down between the strings is 
> trimmed away.
> Is there any efficient and neat way to do this without removing the
> dampers?  What procedure do I follow?
>  >>
> Greetings,
>       It is possible, but I suspect that the remaining 
> noise is more than 
> excess felt.  If you watch the damper lift very carefully, 
> you may see that the 
> noise happens before the lower part of the wedges even 
> clear the strings.  I 
> think you are hearing felt rubbing on strings.  There are a 
> couple of things 
> that help, but they all need to be done with the dampers 
> removed.  It isn't a big 
> deal, but could make for a profitable 90 minutes or so.  
> You may want to 
> simply try this on the trichord wedge notes.  They are the 
> main culprits. 
>   Clean the strings where the  contact is being made. A 
> very slight bit of 
> corrosion makes'em sing when the felt is pulled across 
> them.  I usually use the 
> finest steel wool I can get, followed by a heavy rub with a cloth.
>    Go ahead and trim any long tails with surgical scissors 
> or a blade in a 
> steady hand.  And look for compacted matter where the 
> string touches.  If you 
> find it, clean it off with a sandpaper file.  You might 
> want to run a voicing 
> tool through some of the felt.   
>    Decide if this is a job that calls for new felt. It happens. 
> Good luck. 
>  
> Ed Foote RPT 
> http://www.uk-piano.org/edfoote/index.html
> www.uk-piano.org/edfoote/well_tempered_piano.html
>  <A 
> HREF="http://artists.mp3s.com/artists/399/six_degrees_of_ton
> ality.html">
> MP3.com: Six Degrees of Tonality</A>
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