Hi Larry, Do we consider ourselves responsible for strings that fail? Or glue joints that give way? The answer is no. This answer applies to plates too. There is no need to be afraid of major pitch corrections *if* you have communicated the possible consequences of the action. One tuner in our area was unfortunate enough to have a plate break ten hours after he finished tuning the instrument. He was certainly *not* at fault. He was not even there. At 04:15 PM 12/13/01 -0800, you wrote: >List >I've always wondered if it would even be possible to crack a plate in a well > >designed piano by raising the pitch too high. Would the strongs give way >first? Is the plate designed to compress under string tension rather than >stretch? If a plate CAN crack with too much string tension, how many >cents above pitch might this happen-- 100C? 200 C? Could the plate >crack if too much twist is put on the plate from string tension (ie. >raising >the treble pitch much higher relative to the bass and tenor pitch)? > >Sorry, lots of questions here, but I've sometimes been scared to tune an >archaic beater that's 200C below. I don't mind the extra money for the >pitch raises, but nothing compensates for my wrecked nerves! > >Larry Beach, RPT >Vancouver BC > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. mailto:drpt@sk.sympatico.ca http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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