[pianotech] New string broke twice

[John Delacour]

At 09:15 -0400 14/07/2011, Noah Frere wrote:

>I still don't understand what T to shoot for when calculating 
>diameter. Is there a chart somewhere giving the T for different 
>parts of the scale?

It depends on the length of the scale how much scope there is for 
varying the type of scale, but for the average upright you can expect 
to have the bichords at a tension of 180-190 lbs., the top single at 
about 240-280 lbs and the tension falling gradually to the bottom 
note, whose tension will depend on the length -- anything from 170 
lbs. to 220 lbs. roughly speaking.

JD