Allen, >> Is that in fact why this happened - are they that different? I don't know my metallurgy very well. Just curious if anyone out there has the technical knowledge to verify this. I don't have the figures in front of me, but the difference is significant enough to have been used in bi-metal thermometers for years. With the right figures for your fp stringing, and a little calculator work, you could tell by the number of beats just how far the temperature had changed. Well... maybe more than a little number crunching, but it could be done. >>Yet one more rude reminder (as if I needed any more) about how sensitive and temperamental fortepianos can be. yup. Conrad Hoffsommer - mailto:hoffsoco@luther.edu Certified Calibration Technician (CCT) of Biopowered Digitally Activated Tone Generation Systems "If you have to plug it in, or you can't watch how it works, I don't work on it."
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