noisy grand dampers

[Jon Page]

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 >I used CLP on all the guide rail bushings, and that seemed to take care
 >of that noise, but I think the other will not go away until the part of
 >the trichord dampers that goes down between the strings is trimmed away.

Chances are that if the wires were making noise in the guide rail bushings
then they are slightly oxidized and need polishing to further reduce noise
and wear, and more importantly to reduce friction to dampen better.

The front trichords can be trimmed in the piano with a little care. A pair
of pliers squeezing the wires behind the damper will pinch the felt and a
razor blade can trim the felt flush to the bottom of the wire (pinching
is not necessary but will insure that the felts do not tear). Trichords
on the rear will need to have the damper removed. But it is the trichord
on the front which makes the most noise especially if they go to the upper
reaches of the 4th octave.

If possible, I like to remove the damper. This way I can also pinch the tips
of the trichord with round-nosed pliers to further reduce drag and seat better.

When it comes to grand dampers, I'm no whoosh.


Regards,

Jon Page, piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@comcast.net
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