Squeeky jack spring??!

[Richard Brekne]

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Jeannie Grassi wrote:

> Help! Please! I've a customer with a newer Kawaii grand
> with wood whippens and black plastic jacks. She has
> noticed (I confess I can barely, and never would have
> heard it) a slight rubbing sort of sound when a couple of
> keys are played very softly and slowly. Looks/sounds to me
> like sound occurs when jack is activated. I notice that
> jack spring on her piano goes into a hole in the jack
> which appears to be a looser fit than my older Kawaii with
> wooden jacks, I've tried a tiny drop of clp lube in spring
> hole on jack and on jack centerpin with no result. I'm
> pretty sure sound is coming from jack area, Anyone have a
> similar experience?! What do I do?  Thanks in advance for
> all advice!!   Jon

You might look a bit closer at the spring itself. Sometimes
the darn things are bent such that they come in contact with
the wood of the lower whippen arm. Or they might be moving
against the wood of the post the upper arm is hinged on.

Sometimes just removing a guilty part and looking a bit
closer at it removed from the action can reveal the source
of the problem as well.

Fortunatly, these kinds of action noises are most always
relatively easy to locate.

RicB


--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html


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