[pianotech] ringing dampers

[Gerald Groot]

Hi Wim, 

 

My thoughts FWIW. 

 

1.      I wonder if on a hard blow, the damper felt itself might not be
perfectly aligned with the center of the strings, maybe wiggling one way or
the other just enough to allow the bottom half of these dampers to sneak
outside of the center, to the outside of the wire on either side of it?

2.      Maybe, by chance, these particular dampers are not glued snuggly
enough to the damper head which could account for the above?  

3.      Could it be that the dampers are catching on neighboring dampers or,
the wires are sticking up a little too high or the dampers are adjusted to
jussssst catch the wire on these notes when played just so?  

4.      Maybe too much glue on one side of the felt sticking out catching
these notes when they are played harder?  

5.      High pitched sound.  Maybe a little voicing is needed on one or more
of the string marks in the hammer on that note?

 

Odd and interesting that it is the same notes from F#1-A#3.  All 3rds.  

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of tnrwim at aol.com
Sent: Friday, November 12, 2010 11:58 PM
To: pianotech at ptg.org
Subject: [pianotech] ringing dampers

 

Piano: Yammy U2, 20 years old. On a sharp release, F#1 - A#1, F#2 - A#2, F#3
- A#3 dampen, but not completely, AND, there is a high pitched sound,
probably a high overtone, but I don't know which pitch. All the parameters
for dampers are correct. 

 

I just replaced all the hammer flanges with new spring cords. The student
likes the way the piano plays, but is now complaining about the additional
noise from the piano. Perhaps she never noticed before, (I didn't when I
tuned it four weeks ago), so she thinks it is related to the new flagnes. 

 

HELP!!!

 

Wim

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