[CAUT] Checking

[Ted Sambell]

Jurgen it makes nosense to me either.

Ted Sambell
  ----- Original Message ----- 
  From: Jurgen Goering 
  To: caut at ptg.org 
  Sent: Thursday, December 21, 2006 2:04 PM
  Subject: Re: [CAUT] Checking


  Yes, Thanks Alan for the S&S backcheck info.

  One question: Given an assumed constant tail length and bore length (within bass and treble) I don't quite understand why the backcheck height "increases linearly (with respect to note number) from 3 3/8" for note # 1 to 3 9/16" for note # 88".

  Can someone clarify this?
  Also, would these dimensions be the same in all models?

  Jurgen Goering
  Piano Forte Supply
  (250) 754-2440
  info at pianofortesupply.com
  http://www.pianofortesupply.com


    Alan,
    Thanks for the copy of the instructions.

    The first time I heard of raising the backchecks was from Scott Jones
    teaching at a regional seminar. I think he also talked about using a snap
    ring pliers. Kevin Stock, also with S&S for a time, had a modified snap
    ring pliers with a slot cut out for the wire. He would just lift them, then
    even them out. I think that's because he knew what he was doing
    intuitively. It was Roger Jolly that I first heard put some numbers which I
    need with the idea;.... tail arc radius at 1/2 the hammer hanging distance
    (usually right around 2 1/2), shank intersecting roughly the top 1/3 of the
    backcheck (this does not need to be fussed with if the hammer line gets
    raised from filing or whatever), and the backcheck angled back 18 degress
    from vertical (pretty similar to the 68 or 70 degrees you work from, just
    different point of reference and 4 deg. different). I always enjoy hearing
    the different approaches to the same thing, because not all things work the
    same for everyone, (not wrong, just different) and it is also good to get
    something reaffirmed by a seperate source. A different perspective can
    turn the light bulb on.

    Tim G


      Attached is a S&S document about installing backchecks.

      Have a great break!

      Alan

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