M and H 50 inch upright puzzler solved 1 1/2 years later....

Thomas Cole tcole@cruzio.com
Tue, 24 Jan 2006 09:22:50 -0800


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Dave,

Would you be referring to the brass leaf springs on the jacks contacting 
the back stops?

Tom Cole

Piannaman@aol.com wrote:

> This piano has been bugging me for a long time.  Perhaps some of you 
> remember it.
>  
> The problems were:
>  
> Excessive keydip, yet not enough aftertouch!
> Bobbling hammers throughout the piano, except for the high treble
> Spongy feel, as if the felt punchings were really spongy, yet the keys 
> were not even contacting the punchings.
> Key/action movement felt blocked about halfway through keystroke.
>  
> Checked key height, seemed excessive at around 65mm, but in the end it 
> checked out
> okay
> Key dip was okay.
> Clearance in all possible affecting rails(damper stop, sticker, and 
> jack stop rails)
>  
> Clue:  This problem is probably unique to this particular type of piano.
>  
> Answers later....should be easy for some of you more experienced 
> American techs to figure out.
>  
>  
> Dave Stahl
>
> Dave Stahl Piano Service
> 650-224-3560
> http://dstahlpiano.net/ <http://www.dstahlpiano.net/>


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