On 10/17/2011 4:39 AM, Encore Pianos wrote: > So Ron, what is your opinion about the best place along the length of the > rib to install many bolts for the purpose of mass loading? :-) The 1/4" bolts at the belly rail were clearly a mass loading concern, where I suspect the multiple screws in each rib along the same panel joint across the full length of the joint were installed in the belief that the little sound vibrations that found themselves forced by the strings through the bridge at the speed of sound in maple (somehow getting past the horizontal glue joints of the cap and panel to bridge root interfaces, and making a miraculous right angle turn at the ribs, could make another miraculous right angle turn and climb up those embedded screws to reactivate the panel along that specific joint, enhancing the apparently perceived deficiency in sound amplification at that point. Switching from Faultless to Darnell casters, and possibly adding a forth, would have realized another dramatic improvement. Or maybe the other way. I forget. Or the thing was just falling apart there, and clamping it back together cosmetically (from in top) for buzz bane was the extent of concern. At least a nice brittle finish was put on the agraffes for enhanced vibration transmission instead of that soft brass that was originally there. That had surely to help too. Ron N -------------- next part -------------- A non-text attachment was scrubbed... Name: Agraffe finish1.jpg Type: image/jpeg Size: 24854 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20111017/64c3dbd0/attachment-0001.jpg>
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