M&H BB harmonic

[Jim Coleman, Sr.]

Hi Dan:

Sometimes a Bass string speaking length is to blame for this kind of a
problem, especially since you have already check the tail lengths etc.
If you have poor damping in the Bass, there can be a partial which is
not being stopped by the damper. The check this, play the G#5 several times.
quickly after each time, place your flat hand on various positions over the
Bass strings. If the over-ring tone stops dead when touching a group of 
strings, then you can isolate the one which is the chief cause. Sometimes
adding a third damper wedge will cure the problem. At other times, you 
merely need to balance the damper head so that there is equal pressure
at the front and at the back. Then again, it may be that one string of a 
Bass unison is not beingdamped at the partial which corresponds to the 
G#5.

Good luck.

Jim Coleman, Sr.

On Sat, 22 Aug 1998, Dan Rue wrote:

> Dear List,  I have a client with a problem Mason & Hamlin BB. The piano 
> has a very strong harmonic produced by G#5. The sound continues after the 
> key is released and cannot be stopped by blocking the string or any 
> related strings. The sound is also produced, but to a lesser degree, by 
> G#2,3, &4 and by C#3 & 4. I have tried blocking all G# & C# strings in 
> the piano as well as muting the strings behind the bridges to no avail. 
> Any advice would be greatly appreciated.  Thanks, Dan Rue, RPT
>