[pianotech] What's causing this vibration?

[lim hock seng]

Hi,
1. Strings contacting bridge pins/notches
2. Damper stop rail too high?

Lim

On 10-Mar-2012 10:34 AM, "Tom Driscoll" <tomtuner at verizon.net> wrote:

John,
  A few things come to mind . First is to do what you have done already.
Look , listen, tighten , touch . On thing that can help is whilst the
pianist is activating the buzz get your head right over the board .
First put one ear down toward the board wherever it seems the loudest then
quickly turn the other ear down. Essentially crawl all over and under the
piano doing this.  I'm not sure why but for me the stereo effect of doing
this can lead me toward a location. Finding where it's coming from is a
good start toward a solution.
  If I think it's a case part  I remove the lid and listen then remove each
other part with a test each time.Top stick, stretcher, even the music desk
holders inside the rim. Sometimes the problem follows the case part. Also
remove the lock from the stretcher if the stretcher can't be removed.
  I'll bet we all have goofy stories about this type of problem so here is
mine. A long time client with a fairly new Bosendorfer calls about a buzzy
awful noise . We both do just as you did with your client.
No luck and I was getting frustrated so I stepped back while she played.
Problem solved  !  It was an old rusty metal bathroom medicine cabinet on
the floor 12'  from the piano waiting to go out to the curb on trash day.
We had both heard the noise IN the piano.
    Good luck,
Tom Driscoll

----- Original Message ----- From: "Rebecca and John Silva" <
misc at rjsilva.com>
To: <pianotech at ptg.org>
Sent: Friday, March 09, 2012 6:59 PM
Subject: [pianotech] What's causing this vibration?




Hi,

When playing a particular note on a piano I saw today (Baldwin L) a harsh
vibration would so...
John=
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20120310/c95b5aad/attachment.htm>