[pianotech] New string broke twice

[Noah Frere]

beautiful

On Thu, Jul 14, 2011 at 10:51 AM, John Delacour <JD at pianomaker.co.uk> wrote:

> 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
>
>
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