Backcheck noise

[David Love]

It is the backcheck.  Why it is the backcheck, I don't know.  All other
things have been eliminated.  It's not the roughness of the tail, not the
radius, not the knuckle, not the flange, not the wippen, not the balance
rail hole or pin, not the front rail pin, not poor bedding, not loose
hammers, not loose leads, not loose keytops.  It happens on many notes.  All
backchecks are from the same set.  The next step is to, surprise, change the
backcheck!  Wow are we making progress.    

David Love
davidlovepianos at comcast.net 
www.davidlovepianos.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ric Brekne
Sent: Saturday, August 05, 2006 4:15 PM
To: pianotech at ptg.org
Subject: Backcheck noise

Well... grin... either its a backcheck noise or its not.  I've been 
fooled on more then one occasion in thinking that a noise comming from 
one place when it ends up coming from another.

Classic example is getting fooled by a loose knuckle. This can actually 
sound exactly like a loose hammer clicking on the shank.  Go figure... 
but I assure you it can.

Seems like there's been a few suggestions as to how to go about assuring 
it has to do with the tail / backcheck interface.  Perhaps try the 
process of elimanation tactic ??  Rule out what you can... and if its 
still there start looking elsewhere.

Cheers
RicB

------------
That's more like it.  Done all those things.  

David Love

 > Click like but not exactly a click.  Hard to describe.
 >
 > David Love

A sort of "chiff" maybe? How rough are Steinway tails these
days? We don't have a dealer here, and I don't see many new
ones. Besides the possibility of glue under the leather, and
the drop of CA at the wire entrance points of the check head
and key, I'd smooth the tail on a noisy one, then wire brush
the check leather to see if either made a difference. One
thing at a time, test, etc.
Ron N