<HTML><HEAD>
<META charset=US-ASCII http-equiv=Content-Type content="text/html; cha=
rset=US-ASCII">
<META content="MSHTML 6.00.2800.1400" name=GENERATOR></HEAD>
<BODY style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; BACKGROUND-COLOR: #fffff=
f">
<DIV> Hello everyone. This is my first post, so please excuse any=
idiomatic slip-ups on my part. </DIV>
<DIV> </DIV>
<DIV>Just recently I began learning how to tune, regulate, and repair (=
by way of apprenticeship). Before any of this, though, I'd been aware =
of some bubbling notes on my yamaha p-22. And so recently i set o=
ut to correct the problem, which pervades the mid-range of the key=
board. Here's what I did: </DIV>
<DIV> </DIV>
<DIV>--closed up the hammer-travel distance to 1 3/4" (from 1 7/8"). &n=
bsp; </DIV>
<DIV>--removed the thinner front rail paper punchings (making=
the key dip about 7/16") </DIV>
<DIV>--taken out lost motion</DIV>
<DIV>--regulated aftertouch so that jack just clears hammer butt</DIV>
<DIV> </DIV>
<DIV>Also--and this was a few weeks back, before dealing with =
;the bobbling hammers--I regulated the let-off so that the jack tripped when=
the hammer was within 3/8" from string. In retrospect, i wonder i=
f this served to exacerbate the pre-existing problem. Anyway=
, the bobbling is not always readily apparent. Sometim=
es you can only feel it (and not hear it) during aftertouch. =
Regardless, it's making the touch feel weird, and pianissimo nearly im=
possible. <BR><BR>One last thing: many of the keys see=
m to have a lot of friction to them. I don't know whether this tightne=
ss has to do with the front rail or balance rail bushings. E=
ither way, it's quite difficult to remove any given key from out of its=
pins. </DIV>
<DIV>Does anyone think, then, that this whole thing could be friction-relate=
d?</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Comments much appreciated... </DIV>
<DIV> </DIV>
<DIV>thank you,</DIV>
<DIV>Scott </DIV></BODY></HTML>