Marcel, That's the answer I am looking for. Thanks very much. Peter > -----Oorspronkelijk bericht----- > Van: pianotech-bounces@ptg.org > [mailto:pianotech-bounces@ptg.org] Namens Marcel Carey > Verzonden: dinsdag 17 december 2002 14:31 > Aan: Pianotech > Onderwerp: RE: Soundboardcrown > > > Peter, > > Here are my results and procedure: > > I started with ribs that were crowned to a radius of 65 feet. > Made cauls that had a average radius of 47 ft Dried the > soundboard to a 4.48 % MC (Moisture content) When I took the > board out of the press, I had a crown of 45 feet radius; now, > after a week I have 3/8" between the longest ribs (45.5") > which gives me a radius of 57.5 feet. I'm quite happy with > this crown (Mason & Hamlin "A"). > > Maybe Del will have a different opinion, and I hope he will > share his thoughts on these figures. > > Marcel Carey, RPT > Sherbrooke, QC > > > As you can think already, the press is not curved, but if I > decide to > > curve it, what's the amount you suggest? > > > > > > Typically, if you are going to depend on just the curve of the > > > rib-to-soundboard press to form your crown you would want > to end up > > > with a whole lot more than 3/8" crown (on the longest > ribs) when it > > > comes out of the press. > > > > Does this also means that one looses a certain amount of > crown a few > > days, weeks after the board came out the press? > > > > > > This is why very few, if any, shops attempt to crown > soundboards in > > > this manner. > > > > > > Del > > > > > > _______________________________________________ > > > pianotech list info: https://www.moypiano.com/resources/#archives > > > > > > > > > > _______________________________________________ > > pianotech list info: https://www.moypiano.com/resources/#archives > > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > >
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