Scaling

[Tom Servinsky]

For the record, this Kawai had all sizes in American. All wire sizes were accurate with American measurements. 
When I initially evaluated the instrument and saw the #14 at the top, my first inclination was to assume that it was a #13.5 string.
I have done a number of Kawai's and Yamaha's in the past were the size measurement were 1/2 size larger in all cases. Thus, my curiosity as to why this was different raised several concerns. Could this have been a mistake from the factory?
Or could this be the result of another technician miss-reading the initial readings and stringing with incorrect sizes?

Tom Servinsky
  ----- Original Message ----- 
  From: Avery 
  To: Pianotech List 
  Sent: Monday, June 05, 2006 11:53 PM
  Subject: Re: Scaling


  Dale, 

  Which measurement are we talking about here. 14 American or 14 Metric? 

  Since the chart I posted earlier for the 500 was from Kawai, I figured they're talking Metric. 
  If one is trying to restring a "Metric" piano with American wire, then this "might" be the case. 
  Although I still believe that a class Don Manino gave here in Houston years ago, said that 
  Kawai had done some comparisons and some sizes were the same and some weren't. 

  Where's Don M. when one needs him?! :-D


    14  - 6
    14½ - 8
    15  - 4
    15½ - 6
    16  - 6
    16½ - 6
    17  - 6
    17½ - 6
    18  - 6
    18½ - 6
    19  - 2

  I have sets of both Metric & American, but I've never really compared them. 

  Avery Todd
  University of Houston

  At 07:23 PM 6/5/2006, you wrote:

    In a message dated 6/4/2006 9:12:20 P.M. Pacific Standard Time, Erwinspiano writes:

        Tom

         Wrong assumptions on both counts.  Japanese wire sizes are 1/2 size larger than ours  thus making your first wire size 13 1/2.  Measure it with a micrometer & you'll see.  Been there done that.

        Dale

        Tom asked: "Just unstrung an older Kawai model 500 grand. I was astonished to see that 

        their first wire size was a #14. Thinking about rescaling this down in 

        tension a bit. Anyone out there have any experience with rescaling this 

        mode?. This looks like the pre-cursor to the KG2 model."



        Tom,

        I wouldn't! The soundboards on that model are quite thick and a #14 wire is appropriate. (Ya have to look at the Whole picture.<G>) It behooves you to get a Scaling Program and play around with this sort of stuff.<G> Then practice/experiment on your own stuff. (which entails a lot of "oops! Better Change That!"<G>)





        Joe Garrett, R.P.T. (Oregon)

        Captain, Tool Police

        Squares R I


     
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