set letoff to get acceptable aftertouch?

[Jessica Masse]

Daniel, 

I just went through this and it has happened to me with a set of brand new
hammer butts.  I am never too anxious to go through this again and
especially with new butts.  

 

In my little upright the butt leathers had stretched and the let-off and dip
was not okay and the neither was the key leveling or the capstan/lost
motion. Couldn't be regulated.

 

I took one butt out of the worst area of blubbering and undid the top spot
of glue.  Then I stretched out and reglued the butt leather.  Check for
grooves and ridges, and see that the under cushions are not going to leave
you with a big bump.  I had to trim off a bit of one piece because it just
extended too far.  On the new butts the under felt was too soft and the
leather stretched in no time. 

 

When the butts are loose you can't get the keys leveled or the capstans
adjusted and the jacks won't return properly unless there is a big-terrible
for the butts gap.

 

Try one it might work. 

 

Jessica Masse

RPT Piano Technicians Guild

 

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