<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=iso-8859-1" = http-equiv=Content-Type> <META content="MSHTML 5.00.2614.3500" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Dear List:</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>I service regularly a Wurlitzer 5'3" = Grand (S.N. 68408, purchased in 1998) that has very heavy usage. Regularly their are = audible harmonics (the owner calls them 'hummings') caused by leaking bass = dampers. After regulation the audible harmonics are gone, only to reappear in a = few weeks.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Has anyone else run into this? I'm = ready to start replacing damper felt, I think, unless there is another solution I'm = missing. The dampers can  be the same or different than those previouly re- regulated.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Thanks in advance for any = suggestions.</FONT></DIV> <DIV> </DIV> <DIV><FONT face=Arial size=2>Dan Hallett</FONT></DIV> <DIV> </DIV> <DIV> </DIV></BODY></HTML>