[pianotech] hammer return noise

[Gene Nelson]

>I think Ilvey is stumbling toward the right idea; sounds like the jack  is 
>regulated just slightly too far back and is making that "pock"  sound on 
>return. Regulate spring tension (less), jack position(more  toward the 
>player), and jack height(teeny movement in the hammer when  winked). Noise 
>go away?
> DA

I can get the sound without raising the hammer far enough to trip the jack 
so the noise is either knuckel/jack or??
Spring tensions are on the high side but only slightly - I will pick the 
worst offenders and experiment with spring tension and jack position.
Gene