Changing Out Thayer Shanks

[A440A@aol.com]

Patrick writes:

<<  Most of the notes regulate well, but a few in the 

upper treble will not drop after letoff. I have re-regulated them several 

times, and checked for excessive felt wear on these notes, but nothing seems 

to change.   >>

Well, if the shank will not drop after let-off, what is holding it up?  If 
the balancier is off the knuckle, and the tail of the hammer is not in contact 
with backcheck, there must be some anti-gravity force field right around some 
of these shanks!  
     Could the jack be trapped between the proximal side of the knuckle and 
the mortise felt? 



Ed Foote RPT 
http://www.uk-piano.org/edfoote/index.html
www.uk-piano.org/edfoote/well_tempered_piano.html