Sound coming from the plate

[Isaac OLEG]

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Greg,

The dampers are not supposed to touch this rail, usually, it is there as to
secure them and avoid their lower part to touch the strings if , for example
the sustain course is too wide.

so they are usually shimmed to be at that limit. On little' actions for sure
things are less precise often.


Regards

Isaac OLEG
  -----Message d'origine-----
  De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part de
Greg Newell
  Envoye : dimanche 8 septembre 2002 04:00
  A : pianotech@ptg.org
  Objet : Re: Sound coming from the plate


  Corte,
          I certainly have and have attributed it to the rail that limits
damper lever travel. A definite "BONG" sound. Big pain in the butt while
tuning that you almost can't hear with the case parts back on. That part is
normally a hammer spring rail but in this case the springs are on the hammer
butts. Hope this helps.

  Greg Newell



  At 04:57 PM 9/7/2002, you wrote:

    Hi Everyone.

    Has anyone ever encountered this before?  I have a client with an M1F
from Yamaha.  It's only a few years old but already, Yamaha has discontinued
the line.  It's a 43 " upright and it has one of those crazy lids that lift
up like a grand piano.

    Anyway, I noticed that after I strike a key anywhere in the treble, I
get a metalic sound that is not in tune with the note struck.  It was
obvious to me that the sound I was hearing was the iron plate vibrating for
a short time after the note was struck.  However, as I mentioned, it was a
terrible out-of-tune noise.  It's not extremely obvious but it is loud
enough that it drives the owner crazy.  The plate screws are all tight, as
is every other screw I could find.

    I wonder if this was why this series was discontinued.  Anyone ever run
into a similar problem?

    Corte Swearingen
  Greg Newell
  mailto:gnewell@ameritech.net


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