Newton Hunt wrote: > > Your system seems to be having trouble accepting mail. I am sending this > through pianotech in the hopes it will get to you this time (the third) > > Hi, Tom, > > Well, this is what you have. Please note the BP% on not 31 is 85%. BP% > should never excede 75% or you will be in trouble. Fortunately this is > controllable in a wrapped string. Inharmonicity is also uncontrolled. > > N speak diam INH TEN BP% DIA Unwrapped ends > mm mm mm > 33 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 32 1003.3 0.0410 0.131 164.157 38.629 0.000 0.0 0.0 > 31 1006.6 0.0350 0.043 265.027 85.581 0.057 22.4 15.9 > 30 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 29 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 28 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 27 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 26 1041.4 0.0370 0.064 205.734 59.446 0.065 22.4 15.9 > 25 1013.0 0.0410 0.124 169.858 39.971 0.064 22.4 15.9 > 24 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > > This is what you should have. Tension is under control as is inharmonicity. > If you send me all the specs, speaking lengths, core and wrap for first and > last mono and bichors and steel lengths and sizes I can rescale the entire > piano and provide you with a set of winding specs. > > N speak diam INH TEN BP% DIA Unwrapped ends > mm mm mm > 33 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 32 1003.3 0.0410 0.131 164.157 38.629 0.000 0.0 0.0 > 31 1006.6 0.0430 0.149 175.640 37.576 0.045 12.7 12.7 > 30 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 29 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 28 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 27 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > 26 1041.4 0.0410 0.116 189.701 44.640 0.062 12.7 12.7 > 25 1013.0 0.0410 0.124 190.697 44.874 0.068 12.7 12.7 > 24 0.0 0.0000 0.000 0.000 0.000 0.000 0.0 0.0 > > Have a nice day. > > Newton > nhunt@rci.rutgers.edu > .- Hi, Newton, I did, finally, get your post, as you can see. Sorry for the extra trouble. Thanks very much for the data on the Chickering bass strings. I now have something authoritative to take to the customer and I will need every bit of back up that I can get. She just will not believe that the very fine technician who restrung her piano would "put in bad bass strings". So, I'm hoping that the out-of-town expert will be more convincing. I know that the best thing would be to do as you suggested: rescale the entire piano, no question. Mr. Chickering, after all, didn't have a computer. I also know that the customer only wants to replace the strings that are broken. More likely I will do something in between. Since notes 26 thru 31 are significantly out of spec (inharmonicity, BP%, tension), could just these notes be redesigned? Is this a reasonable alternative? Again, appreciative of your consultation. Tom Cole -- --
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