John, Check out this website <http://tf.nist.gov/general/glossary.htm>. While this page mentions some radio signals that broadcast at A-440, I believe there is also a phone call to NIST which provides the signal at maximum exactitude. Patrick Draine PS I'm sure the Sandersons would be happy to recalibrate your AccuFork at reasonable cost On 7/1/07, John Formsma <formsma at gmail.com> wrote: > > Is there somewhere on the internet that is a totally reliable place to get > smack-on A440.00 Hz?
This PTG archive page provided courtesy of Moy Piano Service, LLC