> Here's an attachment with the scale of a Yamaha U1H (121 cm upright). I > think this piano is a little shorter than the ones you've been tuning, > but the cross over problems are similarly dramatic (Please refer to the > column graphs to the right of the figures). The hammer strike ratio > figures are derived from measurements taken directly from the piano also. > >> Looking for data to compare to observed reaction, for educational >> purposes. > > > These pianos were one of the first instruments which brought the problem > of percentage of breaking strain deviation home to me, during the 70's > when I was working out scaling with a pocket calculator. Its just a mess > and the 131 pianos are no better. > > Best, > Ron O. Thanks Ron, I don't have this one either, and will add it to my scale library. The low tenor was one thing ( which I presumed to be break%), and just above the first tenor break is the other (which I also presume to be break%, from an inadequate dogleg in the bridge). I'd still like a look at the P22 if anyone has the data they're willing to share. Ron N
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