Buzzing at the bridge pin?

[Dean May]

I've seen a Young Chang bridge where the front termination was not chiseled
but rounded. The strings would actually buzz against the wood in front of
the termination since there was no sharp edge for a termination. I had to
re-notch the bridge.

 

Dean

Dean May             cell 812.239.3359 

PianoRebuilders.com   812.235.5272 

Terre Haute IN  47802

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of kurt baxter
Sent: Wednesday, April 30, 2008 9:17 PM
To: Pianotech List
Subject: Buzzing at the bridge pin?

 

I tuned a 30ish yr old Young Chang today that had a scattering of notes that
had
a distinct buzzing coming from at least one string in the unison. There were
about 
5 of these notes, from the bass to tenor.

Troubleshooting showed that the buzzing seemed to be happening at the front
(termination point) bridge pin. No cracks. The pin was loose enough to
wiggle
a tad, but not loose enough to pull out with my fingers, even with the
string 
removed.

A previous tuner had "solved" the problem by putting a paper shim (about two
thicknesses of a business card) on top of the bridge, under the strings.

This seemed to stop the buzzing.

Any idea what is going on here, and what is the right way to fix it?


[kurt]







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