(I guess those were vise grips, not vice grips) David Love davidlovepianos@comcast.net -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of David Love Sent: Thursday, January 20, 2005 7:55 PM To: 'Pianotech' Subject: Impedance problem I ran into an interesting phenomenon today. Rebuilt Steinway A c1915. New soundboard. Reasonably poor job but that's not the issue. Note E5 was extremely loud compared to its neighbor F5. Switched hammers and E5 was still very much louder. So a clamped a set of vice grips onto the rear bridge pins at E5. Sure enough, the addition of some mass caused the loudness to diminish and the sustain to be slightly enhanced. The customer thought so too. I was surprised that the addition of mass would produce an effect so localized without having an appreciable effect on F5. Was I hearing things? Well clearly I wasn't, but what was going on underneath or in the panel that there would be such an effect right at that point. Thinking about it later it occurred to me that rib position under the bridge at that point might have had an influence. Comments? David Love davidlovepianos@comcast.net _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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