Friction/Buzz at Agraffes

Fred Sturm fssturm@unm.edu
Fri Mar 3 12:14 MST 2000


I have very occasionally had buzzes at the agraffe. Sometimes lowering
pitch on one side of a string (lowering enough that string will pull
around the hitch pin) and pulling up the other side will eliminate it.
Does lead to instability for a while, so stretch the string. Otherwise,
remove the string and ream the agraffe hole. 
	For rendering probelms under the capo, a restring including dressing
the capo is the best long term solution. (If you are going to that
trouble, best to pull bridge pins in that area, resurface and renotch,
and replace bridge pins. Cleans up the sound, adds sustain.) I expect it
might help to lube the newly dressed capo to ritard rusting, but don't
know what is best (I spray with Prolube). Here in New Mexico, we are
blessed with very little rust problem, except in pianos moved in from
elsewhere.
Fred Sturm, RPT
University of New Mexico

Ray Bentley wrote:
> 
> Has anyone else found strings to buzz at the agraffe?  I have a piano that
> seems to.  I can usually stop the buzz by raising and lowering the pitch,
> thereby moving the string back and forth through the agraffe.  These strings
> also pop loose at the agraffe during tuning.  It doesn't seem to matter how
> long it has been since the previous tuning, they still pop during tuning.
> Has anyone tried clp or something else there with success.  Also there are a
> few pianos that don't render well.  That is, the friction at the capo bar is
> such that when you pull a string up, it continues to raise with firm blows,
> and vice versa.  Any cure for this?
> 
> Thanks to all.
> 
> Ray T. Bentley, RPT
> Lewis and Clark Community College
> Godfrey, IL


This PTG archive page provided courtesy of Moy Piano Service, LLC