Buzzing at the bridge pin?

[Ron Nossaman]

> 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]

I've seen this in a couple of Young Changs. In both cases, the 
front bearing was negative, and the pin angle was close to 
vertical. Plugging and reinstalling bridge pins at a greater 
slant angle would likely quiet the buzzing, though it wouldn't 
do anything for the bearing angle. A band aid, not a fix.
Ron N