no letoff clunk

[Paul McCloud]

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I would assume you are working on a vertical piano, no?  If you have
sufficient dip, and your blow distance is not too far, you should have
aftertouch ("clunk").  Look carefully at the tip of the jack when the
key is fully depressed.  It should clear the butt by a clear amount
(about 1/16").  See if the hammer has some slight forward movement after
the hammer is caught by the backcheck as you go through the final
bottoming of the key.  This will be present if the regulation is
correct.  If you don't have aftertouch, decrease the blow distance (move
the hammers closer to the strings) by shimming up the hammer rest rail
with punchings or felt and adjusting the capstans to remove lost motion.
Check the jack tips to see if they clear the butts, and see if the
hammer just moves slightly toward at the end of the key stroke.  In a
pinch, you can adjust the letoff a little farther away.  Sometimes a
weak hammer return spring will lessen the "clunk" feeling in the key.
Your piano might be ok, but you wouldn't feel the "clunk".  Strong
return springs make a more defined letoff point and aftertouch feel.

            Now, if this is a grand piano, the above won't help much.

            Hope this helps.  Good luck.

            Paul McCloud

            San Diego

.

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Daniel Schreffler
Sent: Tuesday, September 23, 2003 8:03 AM
To: Pianotech
Subject: no letoff clunk

 

Hello all ,

I was summoned to work on a Charles Walter yesterday, and could not feel
the letoff except on a few keys . there is plenty of key height and
dip.It looks as though someone added more key weight.I found pencil
lines on the keys where the leads looked different than the
originals.The jack seems to kinda roll off the butte with no clunk .
Would someone please help. 

Thanks 

Dan RPT


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