[pianotech] Another Damper Puzzler

[Gerald Groot]

As the dampers are removing themselves from the strings, is this what is
causing the "wooshing" sound?  If so, you may need to trim the bottoms of
the dampers so they do not go quite so far into the strings on the down
swing.  That will eliminate a lot of that "wooshing sound" when they are
lifted off or, drop the level of it down some anyway.    

 

Jer

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ken & Pat Gerler
Sent: Thursday, March 04, 2010 8:43 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Another Damper Puzzler

 

Paul,

I didn't note that, but I did lift a "gang" of damper without moving the
damper lift tray and they were all quiet (I did "Protek" the guide rail
bushing first thinking that was were the problem was located).

 

Ken Gerler

St. Louis, MO

----- Original Message ----- 

From: paul bruesch <mailto:paul at bruesch.net>  

To: Ken <mailto:kenneth.gerler at prodigy.net>  & Pat Gerler ;
pianotech at ptg.org 

Sent: Wednesday, March 03, 2010 4:49 PM

Subject: Re: [pianotech] Another Damper Puzzler

 

Are you certain it's not guide rail bushings? That's what caused a very
similar-sounding noise in a Chinese Falcone I attended to today. 

I originally thought the tray felt, too... manually lifting the tray
(eliminating pedal-thru-pitman) and still resulted in noise. Lifted as many
dampers as possible at the spoons and it was still there, so bingo!

Just a thought... 
Paul Bruesch
Stillwater, MN

On Wed, Mar 3, 2010 at 4:24 PM, Ken & Pat Gerler
<kenneth.gerler at prodigy.net> wrote:

Hello all,

I already ran this by Mark Wisner and he has never had a complaint like this
--  It is RX-2G (5'10") grand.  And if everything is quiet, slowly pushing
down on the damper pedal, it sounds like you are slowly running a brush
across the top of a snare drum.   I have isolated it to the junction between
the under lever "capstan" screw and the damper lift tray felt.  The sound is
not there if the damper are held up with the sustenuto pedal.

 

I put "Protek" on the felt - no change; I put teflon powder on the felt - no
change.  Mark and I discussed using a leather burnisher on the head on the
capstan screws (but I didn't have that with me try).

 

Anyone else ever run into this?  In 40 years, it is the first time (that I
can remember) I have ever run into it. I have had the problem between the
key capstan and the whippen felt and been able to resolve it with the above
products.

 

Thanks in advance,

 

Ken Gerler

kenneth.gerler at prodigy.net

 

 

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