Now THIS is a neat idea! Thump --- Ric Brekne <ricbrek@broadpark.no> wrote: > Hi David > > Yes, the soundboard is forced up. Impair movement of > the soundboard ? > Well yes... that is in a sense what supplying > stiffness does. One can do > that in many ways. Traditionally rib dimensions, > thickness of the > panel, proximity to soundboard termination points... > and other > mechanisms are used yes ??. > > But there is no real reason why you cant supply > crown support and > stiffness in other fashions. What I like about this > idea is that it > relies on a kind of virtual beam... not really > connected to the > soundboard physically. Similiar to Dels idea with > valve springs in > concept, yet no physical contact between panel and > the support system > for the springs. Combined with ribbing either any > kind of soundboard > assembly you can get all kinds of auxiliary support. > In the case of an > old flat panel, you can restore significantly a > condition of crown which > very closely compares to the origional I would > think. It certainly made > a big difference in the sound on this beater. The > workable range seems > to be between 2 and 5 mm seperation. That ends up > being quite a range > of adjustment in terms of pounds of pressure. What a > SB designer can do > with the idea .... who knows ? > > I put two of these on a scale the other day... on > mounted on the scale, > the other forced against it by hand.. I could get > fairly easily 60 > pounds of pressure before my hand was not stable > enough to hinder > sideslip. Magnets have to be alligned pretty > carefully when used like > this. > > Cheers > RicB > > Hi Ric, > > As I understand it...magnets opposing each other are > aligned, one set in the bridge and one set along the > beams > under the bridge. The soundboard is forced up? > Is is possible this would impair movement of the > soundboard? > Are you drilling a hole in the bridge and inserting > one of the magnets there? Interesting experiment > ... > > David Ilvedson > > > > _______________________________________________ > pianotech list info: > https://www.moypiano.com/resources/#archives > __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/
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