This is a multi-part message in MIME format. ---------------------- multipart/mixed attachment Hi Richard Unfortunately I have to tell you there is no K-point although the K sounds appealing it is just the highest point on the soundboard and it has nothing to do with the choice to use the rib or the compression crowning method. As I understand Steingraeber& Sons uses a different method to crown a board then Mr. Klaus Fenner explains in his book. They both use the compression crowned method though. When you picture a spherical shape and drop a soundboard on top of that and let it take on the shape of that sphere then there will be a highest point on that board. The highest point will be on different places dependent on how you place your board on the sphere, resulting in possible curvature in the direction of the long bridge. Mr. Klaus Fenner wanted to shift the tension (if that is the right word) in the board to the treble side to get a better adoptation to the higher frequencies which he called a asymmetrical-spherical soundboard crown. Steingraeber sound boards (as I understand) has his highest point more in the middle of the board and shapes his rim to accommodate and support the spherical form of the board. (Mr. Fenner also shapes the rims) which is a different method than Fenners uses. Greetings Arnold > > Thats my understanding of things anyways. Perhaps some of our German > reading friends out there can translate a bit of this so called K-point > from Fenners recent book. > > Cheers > RicB > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > > ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: spherical form.gif Type: image/gif Size: 81389 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/fe/0b/e2/52/sphericalform.gif ---------------------- multipart/mixed attachment--
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