[pianotech] Echo Issue

[Don Mannino]

Wow, what a leap of logic..  One piano has the problem, so Kawai is no
longer a reliable source for good quality parts?  Maybe that's not what was
intended by this post, but that how it reads to me.  With the many thousands
of pianos that have NOT had this problem, and considering that this piano is
25 or more years old, it doesn't seem that blaming the manufacturer is a
very reasonable conclusion.

 

Besides the gunk on the strings, the ringing problem can be caused by the
dampers being mounted too low.  So a little experimentation with locating
the new dampers would be a good idea.

 

Don Mannino

 

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Patrick Poulson
Sent: Tuesday, March 01, 2011 10:02 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Echo Issue

 

Hi Matthew: My guess is that there is some chemical in the damper felt that
is interacting with the copper windings and leaving the black residue in the
felt as well as on the string. The appropriate solution would seem to be
replacement of the felts with material from a reliable source. i.e., not
Kawai. Also clean the strings with naptha or some other light solvent as
thoroughly as possible.

Patrick 

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