Ed, I am familiar with the Hale Sight o Tuner. Have one here at the University. Aging should have no affect on the unit. What comes to my mind, if nobody messed with the inside (adjustable potentiometers), I believe one of the outside black buttons might be loose and turned. Each one is tightened with two aallen head srews. If that is not the cause, you need to have it callibrated. Everything put to Zero, A-4. Use the Audio out and compare with another Tuning forc or other source. Turn the oscillator screw inside the unit until beatless with the other audio sourrce. Hans Sander, RPT University of Louisville School of Music >>> PSFInc@email.msn.com 10/04/00 09:33AM >>> List, We use a Hale Sight O Tuner in our rebuilding shop, they are great for chipping pianos w/o the action. The other day we checked it against the tuning fork and found it to be almost a half step flat. The Sight O tuner is an older one and was recalibrated about ten years ago. I have to plead ignorance in this case, is it possible for these to go flat like that and how often should it be recalibrated? Is it perhaps another problem? Thanks, Ed Mashburn, RPT
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