Sound coming from the plate

[SUSAN P SWEARINGEN]

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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 -----=20
  From: Alan R. Barnard=20
  To: pianotech@ptg.org=20
  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 -----=20
    From: SUSAN P SWEARINGEN=20
    To: pianotech@ptg.org=20
    Sent: Saturday, September 07, 2002 3:57 PM
    Subject: Sound coming from the plate


    Hi Everyone.=20

    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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