---------------------- multipart/mixed attachment > I am now however suffering from post discovery blues because I can t > find the instructions nor remember the calculation method, which I must > admit, concerns me a little. ---------------------- multipart/mixed attachment Lowell gauge instructions. In brief, the thousandths of an inch quantities represented by the linear increments (division lines) on the gauge are the rise or fall (vertical dimeansion) per inch of length of piano string. So, to give an example, if your rear string length was 3" and your gauge measurement was .009", then the difference in elevation between the top the the bridge (a reference at zero), and the rear string rest would be 3" x .009" or .027". Very simple math. These dimeansions can be converted to degrees of angle by multiplying 1/6 degree times the number of division lines the bubbble has crossed. Crossing six division lines would mean 1 full degree of string angle. More simple math. To determinethe lbs. pressure from the net downbearing measurement multiply the net bearing in thousandths of an inch by the tension of the string. For example, a string of 200 lbs tension, deflected by the bridge so that a net downbearing measurementof .018" (1 degree) is created, will produce a downbearing pressure of 3.6 lbs. (200 x .018). More simple math. Incidentially, the bridge is pushing up at thestring 3.6 lbs. at the same time the string is pushing down on the bridge, thus creating a static equillibrium, like a depressed spring. An understanding of trigonometry is unnecessary, but can't hurt anyone. I hope the above has been helpful. Please contact Pianotek re: the missing instructions. My apologies again. Thanks for buying my gauge. Feel free to ask more questions. ---------------------- multipart/mixed attachment Ron N ---------------------- multipart/mixed attachment--
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