Hi Avery, As an example #15 metric is .001" thinner than the American #15, this translates to a reduction of approximately 10lbs per string. Typically this will reduce overall tension by 3/4 of a ton. Regards Roger At 11:15 AM 27/07/98 -0500, you wrote: >John, > > For a piano of that size & quality, I think I'd go ahead and "bite the >bullet" and order some metric wire from Mapes or somewhere. :-) You're >probably going to run into a lot of metric wire pianos out there anyway. > I just got 12 coils of Mapes best American wire ($67.80) and 12 >cannisters for a total of $93.60 plus freight. I'm sure the metric would be >comparable. I bought mine several years ago after I restrung the top two >sections of our Hamburg 'D' with American wire before it occurred to me >that it was metric. :-( I always have learned my lessons the hard way. > The metric wire is designated with the same numbers as the American. >That's what your numbers on the bridge are. But the sizes are not exactly >the same for identical numbers. > I'm not a scaling expert, but my guess is that if you're going to change >to American wire, you probably ought to measure the speaking lengths and >have someone rescale it. I don't know how much overall difference it will >make, but there *are* some differences in the sizes. > Below is a chart of the dimensions that Ray Chandler once did for Kawai. >Hope it helps. > >Avery > >>I am restringing a Yamaha C7 and dont' have the original strings avaible to >>mic sizes. >> >>The bridge is marked or string gauges, but I seem to recall that the Yamaha >>gauges are metric and slighty different than American (i.e. a #15 isn't >>always a #15) >> >>Is this true? If so could someone be so kind as to give me a conversion or >>expaination of the marked brige numbers? >> >>Thanks in advance (as always) >> >> >>John McKone, RPT >>St. louis Park, Minnesota >>(612) 280-8375 >>mckonejw@skypoint.com > > >METRIC DIAMETER NEAREST US # DIAMETER >13 .0305 13 .0310 >13.5 .0315 13.5 .0320 >14 .0325 13.5 .0320 >14.5 .0335 14 .0330 >15 .0344 14.5 .0340 >15.5 .0354 15 .0350 >16 .0364 15.5 .0360 >16.5 .0374 16 .0370 >17 .0384 16.5 .0380 >17.5 .0394 17 .0390 >18 .0404 17.5 .0400 >18.5 .0413 18 .0410 >19 .0423 18.5 .0420 >19.5 .0433 19 .0430 >20 .0443 19.5 .0440 >21 .0463 20.5 .0460 >22 .0482 21.5 .0480 >23 .0512 23 .0510 >24 .0551 24 .0550 >25 .0591 25 .0590 > >___________________________ >Avery Todd, RPT >Moores School of Music >University of Houston >Houston, TX 77204-4893 >713-743-3226 >atodd@uh.edu >http://www.music.uh.edu/ > > > Roger Jolly Baldwin Yamaha Piano Centre Saskatoon and Regina Saskatchewan, Canada. 306-665-0213 Fax 652-0505
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