On 1/25/2011 11:30 AM, Alan Eder wrote: > Ron, > > Thanks for the explanation--good information. > > The lower the break% of the > wire, the more it reacts to minor tension changes. > > And those tension changes could be brought about by temperature and/or > humidity changes, or is it temperature alone? It's really noticeable with seasonal changes, which would be humidity. It ought to work the same way with short term temperature changes, but I haven't verified that. Has anyone out there had one of my pianos under stage lights? When I'm laying out a new scale and bridges, I try to minimize break% changes across struts by maintaining speaking length progressions with adequate bridge doglegs. In the low tenor, a transition bridge with wrapped bichords can substitute for the foreshortened original low tenor wire, and get the break% up where it's less reactive. Both of these things help tremendously. Add an epoxy laminated cap, and the tuning becomes much more humidity change tolerant. Ron N
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