---------------------- multipart/alternative attachment In a message dated 3/3/2006 3:38:54 P.M. Pacific Standard Time, rnossaman@cox.net writes: > Ron, Barbara > Although I'm* not* a compression crowned soundboard builder I have > built many boards with many kinds of spruce & grain oreintations. Even > pressing ribs on at 5.5 to 6.% compression still exsist in the panel. If > I'm sending a board to the desert it gets dried a bit more. If the Bay > area less is fine. Hi Dale, While you're certainly not building compression crowned soundboards, you are building partially compression supported boards. No denial here of course The ribs are doing part of the work in supporting bearing, and the panel is doing the rest, since the number and dimensioning of the ribs couldn't support crown without panel compression. Nothing wrong with that when it comes to making music, as you have seen and heard for yourself, but denser grain does work better and more dependably in this type of construction. Agreed though some swear some who build CC boards say the board won't belly with 20 plus grains an inch.. I know better An RC&S board does very nicely with 8-12 grains per inch and no, they don't seem to be as reactive to humidity changes as either CC or RC boards because the panel isn't doing much with compression in the first place. I get it I don't know how the Seiler is ribbed, so I can't say how the low grain density panel reacts. Hmm We can only guess. Have a good weekend pal Dale ??? Ron N _______________________________________________ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/18/c7/b6/ac/attachment.htm ---------------------- multipart/alternative attachment--
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