> ....the piano's pitch > will drop as the humidity inside the piano drops to around 42%. Have you or anyone else ever measured the relative humidity fluctuations within a vertical piano equipped with a Dampp-Chaser system? How do you know it goes to 42%? Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "Clyde Hollinger" <cedel@supernet.com> To: <pianotech@ptg.org> Sent: Saturday, April 07, 2001 3:31 PM Subject: Re: heater bar question > Terry, > > If the dehumidifier is installed when the humidity is high, the piano's pitch > will drop as the humidity inside the piano drops to around 42%. > > Here in southeast Pennsylvania I can install a partial system between November > and May at the same time I am on location to tune the piano. In the summer, > though, I need to install the dehumidifier about a month before the tuning to > avoid the risk of undoing my tuning. > > Regards, > Clyde Hollinger > > pianolover 88 wrote: > > > Howdy all, > > > > A customer posed a rather interesting question regarding a heater bar. > > I was there to tune his acrosoic, and noticed that in the past 6 mo. since i > > tuned it last, that the pitch had gone 22C SHARP! So after explaining the > > "pitch adjustment" procedure, and cost (1/2 my tuning fee), I proceeded with > > the tuning. After i was finished i recommended a Heater bar & humidistat, > > since he lives so close to the beach, higher humidity is the only real > > concern, and that a heater bar placed inside his piano, with a humidista, > > would keep his piano much more stable, and far less prone to excessive pitch > > fluctuations. He gladly agreed; But then a thought came over him and he > > asked: "Since you tuned the piano to normal pitch, at the present higher > > humidity, isn't it likely that it will go flat after the bar is installed > > and removes the excess moisture?" Hmmm, good questio, I thought. He didn't > > really seem too worried about it, but just wondered, so I said that in the > > week or two that it'll take before i get the bar & humidistat here and > > installed, the pitch will likely "creep" up a tad, so it should all balance > > out. I did tell him that if he notices any errant notes that may go out > > within a month or two that i would come back and smooth them out, no charge. > > Just wondering how any othe list members would've handled this matter. > > thanks! > > > > Terry Peterson > > Precision Piano Service > > Torrance, CA > > > > _________________________________________________________________ > > Get your FREE download of MSN Explorer at http://explorer.msn.com > > >
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