Hi, Temperature was constant for the time period as far as I know. other than the wattage from the 3 bars on the DC system. At 01:58 PM 08/09/2000 -0400, you wrote: >Don wrote: > >> >> >> I had measured the pitch *before* plugging in the DC system and then just >> before I left measured again. The pitch had dropped by 1.3 cents in 2 >> hours. I felt very vindicated for cancelling the tuning appointment and >> felt much better about charging for a service call. > >Don: >Seeing all this detail, just makes me wish for more data. >Temperature wasn't mentioned, but it is an important factor. Presumably the >ambient temperature appeared to be constant (i.e. air conditioning wasn't >turned off). Then there's the question of the temperature at the soundboard -- >while we know the plate and strings can react quickly to a temperature change >(i.e. air blast from an air conditioner will cause a rapid raise in pitch), >how much of your pitch drop was the temperature affect on the soundboard, and >how much a change in its humidity content (my slightly educated guess is it's >the temperature change). >Any comments or rulings from you or others (Del, Newton, Laoshi Liu Baoli?)? > >Patrick Draine > > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Saskatchewan Centre of the Arts drose@dlcwest.com http://donrose.htmlplanet.com/ 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner
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