Fw: [CAUT] back check wires

[R.Moffatt & Sons Piano]

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R.Moffatt & Sons
Master Piano Technicians
2323 Lincoln Drive S.W.
Calgary, Alberta ,  Canada T3E 5G4
Phone. 403.243.0385
www.moffattpianos.com
Fax.     403.243.6821
email:   moffatt5@telus.net
----- Original Message -----=20
From: R.Moffatt & Sons Piano=20
To: College and University Technicians=20
Sent: Thursday, January 06, 2005 8:47 PM
Subject: Re: [CAUT] back check wires


Hi Roger, it's Bob

  ----- Original Message -----=20
  From: Roger Jolly=20
  To: College and University Technicians=20
  Sent: Wednesday, January 05, 2005 8:48 AM
  Subject: Re: [CAUT] back check wires



  Hi David,
                    The very rigid wire tends to create key noise, from =
the B/R hole/pin.  Just a slight hint of chucking and the key will =
clatter.=20

   I have never heard "noise from the balance rail/ hole/pin" ..caused =
by the back check wire!  If you hear "chucking" consider easing the keys =

  slightly at the balance rail.

   Slightly flexible and the check helps to absorb that noise energy.  I =
think Wim mentioned, better checking from thicker wire.

  Flexible, in any type of playing, will cause ""uneven check"". Wim is =
correct imho!

     This is not so. The slight flexibility helps trap the tail.  Like =
all things in piano work there is a window for the parameter.

  There is always a window, in tuning..and voicing. A very..very..very =
small window when it involves regulation.

    Too flexible unstable regulation, too stiff, then too much noise.=20

  Yes to the first part. Too stiff, in my experiance..great check. The =
noise?? Back to the balance rail. Tell me the relationship between the =
back check wire and the "uneased key at the balance rail" I would love =
to learn!

    Checking is more of a function of  leather/felt quality, and tail =
geometry, plus a little flex.  <G>

  Correct....but...you fill in the blanks. =20

  Definitely going back to sleep.

  Sleep well my friend.

  Roger

  Bob

  R.Moffatt & Sons
  Master Piano Technicians
  2323 Lincoln Drive S.W.
  Calgary, Alberta ,  Canada T3E 5G4
  Phone. 403.243.0385
  www.moffattpianos.com
  Fax.     403.243.6821
  email:   moffatt5@telus.net



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