Don Rose often mentions the new covers for the backs of uprights and the bottoms of grands. I have never installed one of these, but I can easily imagine that they would do wonders for isolating the environment of the soundboard back from the rest of the room. I have no doubt a back/bottom cover will dramatically increase the effectiveness of a good DC installation. Terry Farrell ----- Original Message ----- From: "Charles Neuman" <piano@charlesneuman.net> To: <pianotech@ptg.org> Sent: Sunday, March 24, 2002 6:34 PM Subject: Re: tuning with Dampp-Chaser > > From: "Farrell" <mfarrel2@tampabay.rr.com>: > > Just one thought Charles. If you are using one of the little $30 > > hygrometers out there, I would not attach too much significance... > > Good point. I have to remind myself that 39% or 45% might all refer to an > actual RH of 42%. So I try not take it too seriously. If I really wanted > concrete data, I'd have several sensors placed in different parts of the > piano, logging the RH every 5 minutes or so. Since I don't want to go that > far, I'm throwing in a little intuition into the picture, by generally > "getting a feel" for what's going on, based on how I've seen things > behave. One thing I've learned is that there are tons of variables. > > As for drafts, there are no real drafts like you'd get from a window that > has a leak, but there are large volumes of air that move around in the > room due to temperature changes and open doors, etc. That's probaly worse > than a draft, even. And I have the piano around 6" from the wall, so lots > of air can move behind it, taking the soundboard's precious humidity with > it. > > I only have a short while left of this dry weather, so I want to wrap this > up before the humid weather comes with new challenges for me! > > Charles > >
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