The highest bass damper on this small grand is one where the damper is way offset from the others to clear a plate strut. So the damper wire runs straight back parallel to the head, then takes its right-angle bend down through the guide rail. Trouble is, it rattles, or "twangs" when it settles onto the vibrating bichord, almost like a nano version of twanging a ruler on the edge of the desk in grade school, to get that "doing-oing-oing-oing-oing" effect.
No, the head is not loose on the wire. No, the hole in the guide rail isn't too big. The piano's only a few years old. No, the screw in the damper block isn't loose. No, the damper wire isn't contacting the head -- it runs along the felt, but not right against. it. Yes, the damper lifts and seats straight up and down without twisting.
I just don't know what to do to get rid of that "duhd-d-d-d-d-d" noise (to use a technical term). Maybe they didn't use a stiff enough gauge of damper wire?
--David Nereson, RPT
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090302/fc34e92c/attachment.html>
This PTG archive page provided courtesy of Moy Piano Service, LLC