Bzzzing Dampers

[Norman Barrett]

Hi Jolly & Stacy,

The shank knurling pliers, # 291 in the Schaff catalog, will squeeze the
underlever leads very nicely without removing the underlever. Just be careful to
hold them straight so as not to damage the flange bushing. I have used them for
this purpose several times.

Norm Barrett
Memphis chapter

jolly roger wrote:

> Hi Stacy,
>               This vintage, loose underlever leads could be a problem, I
> have a custom made Yamaha crimping tool that will squeeze the leads with
> out removing the under levers. When one or two are loose more will follow
> garanteed. I'll loan it to you, just pay the Puralator bill.  The second
> offender is badly worn guide bushings. A bright gal like you will have
> checked the tightness of the under lever flange, thats a third option.
> Finally the felt has become depressed and hard. Call me late in the week if
> you think I can help.
> warm regards Roger
>
> At 08:36 PM 1/17/01 -0700, you wrote:
> >
> >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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> >