Well hjell thar Joe :).... The soundboard came out yesterday... mostly anyways... its still soaking on the pinblock end. I couldnt get in there today as I had a trip out east for an all day tuning day. But tommorrow I expect to just lift the remaining section out. Which brings me to a couple questions I'd like your advice on if you dont mind. Ribbing on these seems on the surface of things like they were thinking some kind of web shaped lattice work would support whatever load there was. As far as what I hear from most folks,,, crowning was minimal, if even done at all. So what I am thinking is whether or not there is a good reason to hold onto the ribs that go along the grain ? Just what good do they do ... both structually and acoustically ? I suppose I will end up copying the pattern this time around, but I think I will make a couple machine crowned ribs for the large area of the panel where the bridge is. These things seem to always collapse at the same spot.... bass area of the bridge caves down. I suppose I could dry out the old panel and heat flatten it before regluing the ribs back on... and form some kind of compression support. Piano building tradition here in Bergens past has it that panels are dried out inside during the winter so as to match the lowest normal annual dry period. That equates to about 20 - 25 % RH. The stated reasoning is to prevent cracking, and interestingly enough they used machine crowned ribs.... but thats another story :) Anyways.. what do you think ? I could by the last remaining Jacob Knudsen soundboard... an unribbed panel intended for their small uprights thats been standing on end since 1972... talk about seasoning !! :). But its a bit thicker so i'd have to have it planed down.. Thoughts ? More pics tommorrow. btw.. best I can tell this is from 1812. Cheers RicB Joseph Garrett wrote: > RicB, > Finally got access to the whole archive(s). That's definately a Square piano > of the early 1800's. Very much like the 1805 Muzio Clementi, I have the > privilege to work on. From a purist's point of view, it would be best to > clean the board, possibly re-rib/crown it, etc. I've not had the opportunity > to put a new board in one of these thingees, but it would be interesting, > from the stand-point of "truly" hearing what the "new" instrument, > "probably" sounded like! As for the wire size(s), that's a new one, on me, > and I'm sorry I can't be of much help. As it is European, I suspect > clarification will have to come from European sources. Good luck and keep me > posted, as I am muchly interested in your project! > Very Best Regards, > Joe Garrett, RPT, (Oregon) > Captain, Tool Police > Squares Are I > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html
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