The difference between 0.50 mm and 0.52 mm KF's is actually not very big!
If we take for example string length 600 mm and a = 220 Hz, we get the
following "tensions" (well just "Kilograms" on our dear Earth ;-) )
KF 50 = 0.50 mm => 2.598 Kg ~ 2.6 Kg
KF 52 = 0.52 mm => 2.702 Kg ~ 2.7 Kg
The difference with, let us say, KF 50 from a=220 to bb=233.08 is from
2.6 Kg to 2.8 Kg. So this KF 50 - KF 52 example corresponds about a
quarter tone difference in the tension, which is not very big...
All the best,
Arto
On 04/05/16 21:42, Herbert Ward wrote:
I measured seven Savarez Alliance KF strings, and compared my measurements with
the sizes printed on the envelopes. These were brand-new unused strings.
There was quite a bit of inconsistency. My measurements ranged from 4% above
the envelope value to 4% below.
But it seems strange that people who achieve the precision needed to make
a lute string would be so imprecise in labeling their envelopes.
I'm guessing that they round the number off to the closest whole number.
For example, a KF 52 might actually be KF 52.2. Then they propagate that
inaccuracy to the inches number.
At any rate, this complicates the process of ordering replacements for
broken strings.
To get on or off this list see list information at
http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
