I think I'd try placing a short piece of felt above the damper, by hand, to see if it stops the ringing. If it does, can you A) move the damper up slightly higher (or--maybe--lower) on the wire or B) replace them with Baldwin triples. How's the old damper spring tension? Maybe replacing the bass damper levers & springs would be worthwhile. Thoughts. Alan Barnard Smothered in Snow in Salem, MO ----- Original Message ----- From: <Tvak@aol.com> To: <pianotech@ptg.org> Sent: Wednesday, December 04, 2002 8:06 AM Subject: damper modification help > I replaced the dampers on a big old upright piano and now find that the new > dampers are not doing their job very well. The monochord strings all have a > ringing third partial (octave+5th). They are seated and regulated properly. > > The original damper felts were one inch in length, one solid piece. So I > replaced them exactly that way using Steinway damper felt. As a solution to > my problem it was recommended to me by another tech whose work with dampers I > respect, that I split this one long piece into two smaller pieces on the same > damper head by cutting a "wedge" into the middle. He felt that the two > resultant pieces will be less stiff, and will conform to the string and > provide better damping qualities. OK, sounds like a plan to me. > > "Wedge" implies a triangular cut. If this is the proper method of doing > this, should the wide end of the triangle be on the string side, or the > damper head side? Or does it have to be triangular at all? Couldn't I just > cut a square portion from the center of the damper felt and accomplish the > same thing? > > Any advice, tips, or alternate solutions will be appreciated before I take > razor to felt. > > Thanks, > > Tom S > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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