Vibrations

[tom]

Subject: Vibrations

Can some of you, based on your experiences, provide me with areas to begin
looking for vibrations of certain notes?  The problem is not buzzing because
of loose ribs.  I have a client with a Baldwin grand, and she said there are
vibrations on only a few notes, and I want to begin troubleshooting.

 

So, any ideas on where to begin looking would be appreciated.

 

Thanks so much,

Matthew           

            

Matthew,

            Good suggestions have been made so far. 

            I’ll paraphrase the great Yogi Berra here. (Even though he is a
N.Y. Yankee)

            “You can observe a lot by looking (listening)”

            

It can sometime help to have the owner play the note(s) whilst you climb
over under and around this thing. Touch – push – grab everything including
stuff on the wall. 

One client was remodeling and put an old metal medicine cabinet on the floor
10 feet from the piano. At the piano the noise WAS coming from the piano
(Bosendorfer) .I stood away while she played and the noise came from behind
me (the cabinet) 

            

            Don’t take any case parts off at first. Hear the buzz then
remove on part at a time. 

            Occasionally the noise will follow a case part and you’ll have
it.

            

            Recently I had a noise from a top stick at rest rattling against
the plate as an example of a case part noise.

 

Over the years one of the most vexing was on an old Chickering grand. Turned
out to be the back action mounting blocks that were secured to the belly
rail with screws and washers. One was just a little loose and you would have
thought the soundboard was coming apart from this noise.

My point here is it could be a myriad of possibilities .Think of it as
treasure hunt and by enlisting the owner they will have a real appreciation
of your efforts and ultimately your expertise.

            

Tom Driscoll RPT

 


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