v-bar/capo repair

[Andrew and Rebeca Anderson]

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Barbara,
While this is a patch of a fix, you may want to consider Pitch-Lock 
string couplers.  I'm presuming that putting a brass dowel down on 
the front duplex string silences the duplex noise.  You can couple 
both outside strings to the center string and then slide the 
"staples" until you tune a pleasing interval off of the speaking 
length.  It works to get rid of the noise while you investigate 
permanent difficult fixes.

Machining in a hardened rod still requires access to the bottom of 
the capo as far as I know.

Good luck,
Andrew

At 05:13 PM 2/28/2006, you wrote:
>Howdy,
>
>Back to the 8' Seiler grand.  Sorry if I'm starting to sound like a 
>broken record.  Here's the story:  I serviced this piano when it was 
>new.  Not long into its life, it developed a noisy duplex at the low 
>end of the treble section.  I muted it off.  I tuned it for a few 
>years, I moved away...
>
>I moved back.  In the meantime, the piano was restrung.  I started 
>servicing it again a year after it was delivered.  9 months into 
>servicing it, the noisy duplex returned in the exact same spot--but 
>add another note.  I freaked out (not in front of the customer), the 
>customer freaked out, too (not in front of me).  I contacted the 
>rebuilder who said he filed the capo. He and I came to the 
>conclusion (whether we are correct or not) that it is a case of soft 
>cast iron.  I looked up hardening cast iron in the archives.  To do 
>that would mean taking the plate out of the piano and that's not an 
>option.  I'm convinced if I refile the capo, the same thing is going 
>to happen again.
>
>I know there are some pianos that have some sort of rod installed at 
>the v-bar.  Is it possible to do the same with this piano at the 
>capo?  Has anyone done it?  Do you have detailed instructions?  Will 
>someone hold my hand?.....Please?
>
>Thanks,
>
>Barbara Richmond, RPT


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