Hi Don, Maybe I was trying to be a little facetious when I asked that question about sling psychrometers. I'm new to the piano tuning business and to this group and I really appreciate all the great information I find here but I find it kind of old fashion to use a sling psychrometer instead of some of the more modern technology that makes the job easier. When I was in Air Weather Service many of the instruments we used made our job easier. The ceilometer (I think that's what it use to be called) was an instrument that calculated ceiling heights around 3500 feet. You looked into an eye piece (like the old hand crank silent movies in fun houses) and saw a picture of where the cieling was and it was measured in feet. That was much easier than simply going outside, looking at the sky, and saying "The ceiling looks like it's about 3500ft." And believe me we had to do that. We also stood outside on the tower ramp crankin' that ole sling psychrometer and then used a round plastic calculator to actually figure out the RH. (Boy you're really making me think about all those things I'd forgotten about). Point is: Is a sling psychrometer really a more accurate device and is it worth the time? I like tools too and that stuff is fun and interesting but does it do a better job. Wayne ----- Original Message ----- From: "Don" <pianotuna@accesscomm.ca> To: <pianotech@ptg.org> Sent: Tuesday, April 16, 2002 5:31 PM Subject: Re: toys > Hi Wayne, > > Humidity levels dramatically affect tuning stability. Record keeping is > useful for suggesting solutions to clients. > > At 04:45 PM 4/16/02 -0700, you wrote: > >Use to use those when I was a weather observer in the Air Force back in > >1966. > > > >How do you use them to tune and repair pianos? > >
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