[pianotech] after ring on bass damper

wimblees at aol.com wimblees at aol.com
Sat Aug 1 21:03:47 MDT 2009


I've got a Kohler & Campbell 5'9" grand that has very noticeable after ring on B1 and C2. At the convention I asked Roger Jolly about it, and he showed me how to "voice" the damper felt, by sticking a long needle into the felt, first from the front, and then from the back. He demonstrated this technique on several notes on a couple of different pianos,?and it worked quite well. But yesterday?I went to the piano in question, and tried to do the same thing. I got the damper to work a little better, but there is still a lot of after ring. 

This is not a sympathetic vibration coming from another string. The damper is properly seated, with plenty of follow through. The actual ring of the string stops, but there is excessive after ring. It goes away when I put just a little bit of pressure on the damper head.
?
I'm open to other suggestions. 


Willem (Wim) Blees, RPT
Piano Tuner/Technician
Mililani, Oahu, HI
808-349-2943
Author of: 
The Business of Piano Tuning
available from Potter Press
www.pianotuning.com
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