[CAUT] Bass string & Aliquot bar contact noise

[Ed Sutton]

You can test this by putting a shim of some sort over the aliquot.
Also try plucking the string with a strong vertical pull and see if that 
exaggerates the sound.
Don't overlook the possibility of a slipping copper winding.
Ed S.

----- Original Message ----- 
From: "Robert Callaghan" <robert.callaghan at harmonicity.com>
To: <caut at ptg.org>
Sent: Saturday, October 09, 2010 4:08 PM
Subject: [CAUT] Bass string & Aliquot bar contact noise


> I'm looking at a grand piano where an upper bass string has a very 
> pronounced "zing" on a hard blow. It sounds just like when a damper wire 
> touches the string. But even with the damper removed I hear it.  I suspect 
> it is the bass string touching the treble aliquot bar below it, meaning 
> perhaps the aliquot bar is in the wrong spot, too far up the slope of the 
> plate. Before I do anything like move the aliquot bar, I want to run this 
> by everyone. Do you agree this could be it?
>
> Thanks.
> Robert
>
>
>
>
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