Sound coming from the plate

[Isaac OLEG]

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Hello,

You could use a big screwdriver or a hard wood dowel as a stethoscope to
check more precisely where the sound is produced. I believe you can find
cheap stethoscopes for automotive work.

Or call a doctor, they have a real one generally, but ask you to say "33",
the piano may not be able to do that.

Aspirin and go to bed early

Isaac


  -----Message d'origine-----
  De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part de
SUSAN P SWEARINGEN
  Envoyé : dimanche 8 septembre 2002 01:39
  À : pianotech@ptg.org
  Objet : Re: Sound coming from the plate


  The reason I think it's the plate is that when I have the piano open and
put my ear right next to the plate and play a note, my ear is hearing it
coming directly from the plate itself.  In addition, it has a kind of
metalic timber to it.

  I'm going to try and press a piece of felt above the pressure bar, like
was mentioned in the previous post, and see if that helps.
    ----- Original Message -----
    From: Alan R. Barnard
    To: pianotech@ptg.org
    Sent: Saturday, September 07, 2002 5:23 PM
    Subject: Re: Sound coming from the plate


    Had the same "sound" in a Wurlitzer upright ... buzzed mostly when I
played A4. Turned out to be the lock for the lid ... only made the noise
when it was opened for tuning ... taped it while tuning. Point: Are you sure
it's the plate? I read about a tuner that went nuts looking for an
out-of-tune resonant buzz in a piano ... finally found it was a loose piece
of glass in a leaded glass window near the piano!

    Alan Barnard
    Salem, MO
      ----- Original Message -----
      From: SUSAN P SWEARINGEN
      To: pianotech@ptg.org
      Sent: Saturday, September 07, 2002 3:57 PM
      Subject: Sound coming from the plate


      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

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