[pianotech] Yamaha Upright String Breaker

[Ron Nossaman]

On 1/8/2011 2:27 PM, John Delacour wrote:

> Don't confuse _your_ 69% with _mine_ . Whatever spreadsheet you and
> others are using is misleading. You should not have bass strings at a
> tension greater than 70% of the figure in the table below. From what
> I've heard from others who use, probably, the spreadsheet you refer to,
> you should not exceed 50% of the BS figures it uses.

Your 70% is approximately 57% by Sanderson's formula.
Ron N