A technician friend has a Sanderson Beat-Rater for sale, new condition. He is asking $100.00. It is very helpful for setting an aural temperment using the 4 contiguous thirds. Each of the thirds F-A, A-C#, C#-F, F-A have a button, which when pushed make a pulsed sound at the speed that interval should be. There is a speed regulator to modify the pulse speed and volume control. It is a nice unit, and would be a good tool for a new tech, or anyone wanting to practice this kind of temperment tuning. E-mail me privately if interested. Thank you, Paul McCloud San Diego
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