List, I have an 1880 Steinway Upright (85 note) in my shop needing to be restrung. It had many strings replaced over the years, and when measuring the scale during tear down, I suspect this isn't the original scale. I used PSCALE to evaluate the existing strings, and while it shows a reasonably smooth curve, it's at the bottom of the target for tension, especially the bottom 3 notes which are around 26-30 breaking % and between 107 to 120lbs. tension. And the tenor section is right on the bottom line of the inharmonocity curve I played around with the wire sizes, and came up with a better looking scale, but it would add about 850lbs to the overall tension. Is this too much? (original scale total tension is 24703 lbs, and the one I came up with is 25660 lbs.) Below is more info if anyone wants it. I didn't see anything in the Travis book that looked like this piano. Thanks for your thoughts. Gordon Large, RPT Hallowell, ME S&SUPR.DBF Scale Data N SPLM DIAM T INH TEN BP 85 59.0 0.0300 TP 12.842 139 61 84 63.0 0.0300 TP 11.088 141 62 83 66.0 0.0300 TP 10.332 138 61 82 68.0 0.0300 TP 10.292 130 57 81 73.0 0.0300 TP 8.698 134 59 80 76.0 0.0300 TP 8.311 129 57 79 80.0 0.0310 TP 8.113 136 56 78 83.0 0.0310 TP 7.860 130 54 77 88.0 0.0320 TP 7.439 139 54 76 93.0 0.0320 TP 6.694 139 54 75 99.0 0.0320 TP 5.852 140 54 74 104.0 0.0320 TP 5.393 138 53 73 109.0 0.0330 TP 5.336 143 52 72 115.0 0.0330 TP 4.834 142 52 71 121.0 0.0330 TP 4.427 140 51 70 128.0 0.0330 TP 3.968 140 51 69 135.0 0.0330 TP 3.599 138 50 68 143.0 0.0330 TP 3.209 138 50 67 151.0 0.0340 TP 3.076 146 50 66 159.0 0.0340 TP 2.808 144 49 65 168.0 0.0350 TP 2.680 152 49 64 177.0 0.0350 TP 2.441 150 48 63 186.0 0.0350 TP 2.247 148 48 62 195.0 0.0350 TP 2.088 145 47 61 206.0 0.0350 TP 1.882 144 46 60 217.0 0.0350 TP 1.715 142 46 59 229.0 0.0350 TP 1.553 141 46 58 242.0 0.0350 TP 1.397 140 45 57 254.0 0.0350 TP 1.292 138 44 56 266.0 0.0350 TP 1.206 135 43 55 280.0 0.0350 TP 1.103 133 43 54 294.0 0.0350 TP 1.018 130 42 53 329.0 0.0350 TP 0.729 146 47 52 346.0 0.0350 TP 0.669 143 46 51 364.0 0.0350 TP 0.613 141 46 50 384.0 0.0360 TP 0.588 148 45 49 406.0 0.0360 TP 0.528 148 45 48 428.0 0.0360 TP 0.480 146 45 47 452.0 0.0360 TP 0.433 145 44 46 475.0 0.0370 TP 0.421 151 44 45 502.0 0.0370 TP 0.379 150 43 44 528.0 0.0370 TP 0.347 148 43 43 555.0 0.0370 TP 0.319 146 42 42 585.0 0.0370 TP 0.290 144 42 41 615.0 0.0370 TP 0.267 142 41 40 647.0 0.0370 TP 0.245 140 40 39 680.0 0.0370 TP 0.225 138 40 38 715.0 0.0370 TP 0.207 136 39 37 754.0 0.0370 TP 0.187 135 39 36 792.0 0.0370 TP 0.173 132 38 35 834.0 0.0370 TP 0.158 131 38 34 876.0 0.0400 TP 0.170 150 37 33 922.0 0.0400 TP 0.156 148 37 32 958.0 0.0400 TP 0.150 142 35 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100615/6e3233f5/attachment.htm>
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