Unstable regulation

[Farrell]

Hello Greg,

Three words: growing action brackets

It would seem you are not familiar with this phenomena? YC pianos from the 
early '90s or so had a problem with the alloy used in their action 
brackets - they expand over time. The most obvious indicator of this 
happening is blocking hammers. You need to replace the brackets with new 
ones before this action becomes one with the pinblock and keybed.

Go to the archives and do a search on something like "Growing Action 
Brackets" or "Expanding Action Brackets". There will be TONs of info there.

I've done a bunch of these jobs. Happy to help if I can. I don't know 
exactly who to talk to anymore at YC since they went belly-up.

Terry Farrell

From: "greg hollister"

>I have been tuning a mid-sized Young Chang grand for a
> serious client for several years now. Each time I go
> to tune it I find the hammers blocking at the strings.
> I'll turn down the let-off dowels to some degree of
> let-off to get me through the tuning. But each year I
> go back to her house the condition is the same, the
> hammers are blocking again.  I want to regulate this
> piano as it should be but I am concerned that I will
> be frustrated by whatever it is that causes the return
> of this blocking condition.
> Does this sound familiar to anyone? Could this be a
> loose let-off rail? I have marked the capstans to see
> if they were turning on their own and they don't
> appear to be.