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

[Erwinspiano@aol.com]

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Dave
   Key dip & the subsequent amount of hammer  blow distances it can 
accommodate is like sex &  marriage.  No  marriage ,no sex. ....well....it's sposed to 
be that way !
   You didn't bring this up. I can move the hammer 2  inches if I want a .450 
key dip.  Or a .390 dip & a 1 & 3/4 ' blow  distance. or a 1 1/2 " blow & a 
.370 dip  How about more  info.  we'll fixer for ya..... The piano that is
  Dale

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



 

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