At 07:42 1/21/2006, you wrote: >>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 I may have the raw data (i.e. hard copy) at school, if you can wait until Monday. Conrad Hoffsommer Early to rise: early to bed; Makes a man healthy, and socially dead.
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