Bzzzing Dampers

[Tom Driscoll]

Stacy, Try lightly sanding the felt with 220 sandpaper. just one light pass
on every surface that touches the string may correct or at least improve the
condition. Replacing the worst offender with new felt would also confirm a
hardened damper condition. Remote chance it could be a damper guide bushing
, loose damper head set screw, loose lead weight in the lever,but I think
you are on track focusing on the trichords, especially given the age of this
thing. Off the topic I see a lot of string breakage @ the capo on these
older models . Tom Driscoll
----- Original Message -----
From: "Stacy Adams" <adams_piano@hotmail.com>
To: <pianotech@ptg.org>
Sent: Wednesday, January 17, 2001 10:36 PM
Subject: Bzzzing Dampers


>
> List,
>
> I tune a Yamaha G1 (1963) for a local piano teacher who has been
complaining
> of a buzzing key (D4).  It seems that the buzzing is being produced by the
> damper, a trichord wedge, as the felt settles between the vibrating
strings.
>   The damper appears to be aligned to the strings and the dampers overall
> are in decent regulation.  There are several other trichord dampers that
> buzz in this manner, but to a lesser degree.
>
> Is it a possibility that the problem stems from the consistency of the
aging
> damper felt?  Could the design of the piano (trichord wedges to F4) also
be
> a contributing factor?
>
> Any ideas to cure this annoying bzzzzz would be much appreciated!
>
> Many thanks,
>
> Stacy Adams
> PTG Associate
>
>
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