Buzzing Dampers......... Usually caused by the felt hanging down between the strings too far. You really have to trim them. First, you make a cut so that the material hanging below the strings is no longer there, then you make two more cuts on each half of the trichord, so that the damper ends are radiused. Then you might have to do some minor fitting. That's about it. Really nothing to be afraid of, just do it very carefully. I also have glued a piece of 120 grit aluminum oxide sandpaper to the back of my little machinists' ruler. I use that on dampers to get rid of that crustiness that can make dampers "oink". Also, make sure that the bushing in the damper guide rail is not too loose. It's supposed to be tight enough to prevent the damper from rattling around as it seats. Hope this helps. ----- Original Message ----- From: "Stacy Adams" <adams_piano@hotmail.com> To: <pianotech@ptg.org> Sent: Wednesday, January 17, 2001 8:36 PM Subject: Bzzzing Dampers > > List, > > I tune a Yamaha G1 (1963) for a local piano teacher who has been complaining > of a buzzing key (D4). It seems that the buzzing is being produced by the > damper, a trichord wedge, as the felt settles between the vibrating strings. > The damper appears to be aligned to the strings and the dampers overall > are in decent regulation. There are several other trichord dampers that > buzz in this manner, but to a lesser degree. > > Is it a possibility that the problem stems from the consistency of the aging > damper felt? Could the design of the piano (trichord wedges to F4) also be > a contributing factor? > > Any ideas to cure this annoying bzzzzz would be much appreciated! > > Many thanks, > > Stacy Adams > PTG Associate > > > _________________________________________________________________________ > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. >
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