M&H BB harmonic

[Richard Moody]

Wasn't a Helmholtz Resonator put in some of these pianos. I have never
seen one, only read about it.  Don't they resemble the shape of a trumpet
mute?   Were they to eliminate certain resonances, or inhance them? 

Ric Awondering
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> From: harvey <harvey@greenwood.net>
> To: pianotech@ptg.org
> Subject: Re: M&H BB harmonic
> Date: Saturday, August 22, 1998 2:07 PM
> 
> Dan, when you finish exploring the damper, string and belly areas, crawl
> under and check the spyder. 
> -jh-
> 
> At 06:30 AM 8/22/98 -0800, you 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.