Mellotronists

Hi John,
 
Most keys stick for a number of reasons:
 
1) The hole underneath has become tight and you need to use a 'key easer'  
that piano tuners use.  These crush the wood accurately alowing the key to  ride 
on the pin.
 
2) The felt underneath is dislodged and the pin is riding inside the wrong  
bit
 
3) One pinchroller spring is catching another.  Check alignment
 
4) The key is warped and will need judicious sanding to stop it interfering  
with the adjacent key
 
5) The key pin is too far forward or too far back and is not central to the  
hole in the key.
 
If you swop around the pinchrollers then you will need to adjust the white  
keys for level using the back woodscrew in either the left or right  position.
 
Best,
 
Martin
 
STREETLY ELECTRONICS - All Things  Mellotronic
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