Today's Puzzler

[Tom Driscoll]

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-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of Bill Maxim
Sent: Tuesday, April 29, 2003 9:31 PM
To: Pianotech
Subject: Today's Puzzler

 

List,

 

Servicing a geriatric Chickering concert grand today, D4 had a rattle
somewhere in the action that sounded like metal on wood.  I was in the
process of regulating backchecks and noted that the backcheck wire was
loose in the key, so I fixed that with thin CA glue.  The rattle
persisted and seemed to be coming from the top action, so I pulled the
wippen.  There was no rattle in the key, the capstan was tight, and
everything appeared tight in the wippen, even when banging it on the
table.  What was causing the noise?

 

Bill Maxim

            

           Hard punching on the jack regulating button ,or loose spoon
contacting the aforementioned button? 

            Also on a smaller Chickering I had a loose screw mounting
the damper action. This was a machine screw with a washer and was more
of a metallic sound than what you describe and vibrated on only one
note. Took me hours to find!

            Tom Driscoll


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