To all those who believe that Steinway stringing scales should be inviolate,
here are measurements from an original Steinway model "O" #200532, the set of
"duplicate" strings that I recieved for this piano when I ordered a stock set of
"O" strings from Mapes, and the optimized strings that I designed using Rescale
software. Measurements are for core and overall diameter (OD).
After calculating the actual copper sizes used by Mapes, it would appear that
they change wire sizes as infrequently as possible, which certainly facilitates
their manufacture. Not that I mean to pick on Mapes, I would assume most other
suppliers do this as well. My point is that these strings *were* redesigned.
Note# Original Mapes Rescale
Core OD Core OD Core OD
1 .059 .213 .064 .225 .055 .219
2 .055 .209 .059 .216 .055 .214
3 .055 .202 .055 .202 .055 .207
4 .051 .198 .055 .203 .051 .194
5 .049 .190 .051 .192 .051 .185
6 .049 .181 .049 .190 .051 .179
7 .047 .179 .049 .179 .051 .173
8 .047 .173 .049 .172 .049 .165
9 .047 .163 .047 .171 .048 .156
10 .047 .155 .045 .169 .047 .151
11 .042 .135 .042 .135 .047 .127
12 .042 .129 .042 .130 .046 .126
13 .042 .123 .042 .123 .045 .119
14 .042 .119 .042 .118 .044 .112
15 .042 .113 .040 .117 .043 .111
16 .040 .104 .040 .111 .043 .105
17 .040 .097 .040 .102 .042 .098
18 .040 .098 .040 .098 .042 .098
19 .040 .094 .040 .098 .041 .091
20 .040 .094 .040 .094 .041 .091
21 .040 .092 .040 .094 .039 .085
22 .040 .088 .040 .090 .039 .085
23 .038 .081 .038 .086 .038 .079
24 .038 .077 .038 .080 .038 .079
25 .038 .077 .038 .076 .037 .073
26 .038 .073 .038 .072 .037 .070
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