BTW, for those of you who do these kinds of measurements or are interested in doing them I’d be interested in collecting some data on old soundboards using the system in the table below. I’d also be curious as to what you decided to do, restring or replace but you don’t have to let me know that if you don’t want. The procedure is pretty simple which is to stretch a string along the longest section possible between or adjacent to the ribs and measure the crown with a simple wedge gauge which you can make (see attached pictures). Measure the downbearing on three or four strings per section (mark the ones you are measuring), and then when you take down the tension measure the same strings again. Try to match the downbearing measurements to a the same place that you measure the crown. (Just an aside—I’d have posted this on the new website as well but the hoops to jump through for posting the chart below and the pictures are just too time consuming, FWIW). David Love www.davidlovepianos.com Rib# Crown DB w-ten/wo Rib L H W (mm) Or section w-ten/ wo-ten 1 2/2 .006/.015 600 17 28 2 2/2 .006/.015 790 20 27 3 2/2 .009/.012 940 20 27 4 1.5/2.5 -.006/.003 1040 20 27 5 0/.5 -.003/.003 1080 22 27 6 0/0 -.009/.006 1120 21 27 7 0/0 .006/.018 940 21 26 8 0/0 .006/.021 660 20 25 9 0/0 .006/.027 560 20 18 10 0/0 .018/.042 390 18 23 11 0/0 .022/.045 340 17 23 12 0/0 .025/.050 270 16 23 David Love www.davidlovepianos.com -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG00261-20110623-1132.jpg Type: image/jpeg Size: 60084 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110623/1e021d2c/attachment-0002.jpg> -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG00262-20110623-1132.jpg Type: image/jpeg Size: 80522 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20110623/1e021d2c/attachment-0003.jpg>
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