Ric By "first year production" do you mean 1853? Do we have any idea how soundboards were made then; i.e. compressed or not? What is the grain orientation? How close is the long rib to the bridge? Ed S. -----Original Message----- >From: Ric Brekne <ricbrek@broadpark.no> >Sent: Jan 21, 2006 10:11 AM >To: pianotech <pianotech@ptg.org> >Subject: Soundboard rib question > >Hi folks... > >Despite knowing that the major rebuilders are probably not going to >answer this because they dislike my foul rotten guts (for some >mysterious reason... :) ) I will put this to the forum anyways, hoping >to get some insights. > >I have this first year production Bluthner straight strung that I am >getting ready to pull the soundboard out of. One of the options I am >considering is to alter the ribbing system on this. The instrument >measures about 195 cm, and has only 6 ribs. These are not very >substantial ribs at that... The ribs are wide and short and get taller >in the middle and have a _^ shape as opposed to a rounded shape.. 28mm >wide, 9mm tall along their sides, 14 mm tall in the center. There is a >long extra "rib" that runs roughly parallel to the bridge and crosses >over the cross grain ribs as well. It measures 55 mm wide and 15mm tall. > >I suppose given the dimensions of the existing ribs this was a so called ><<natural>> crowned board in its time (ie compression with flat ribs in >a flat caul). My question is just how much beefing up of the system is >advisable ? I am assuming the amount of downward force on the board >was significantly less then present instruments have. I want to try and >keep close to the origional sound picture these instruments had but at >the same time I want the thing to be structurally strengthened (if >necessary) and try and create a bit cleaner treble then fortes I have >heard typically have. > >I could just pack the thing off to Bolduc and get a re-creation.... a >nice easy option I suppose... but before I do that I wanted to hear what >some of you think. > >I will be greatfull for any replies. > >Cheers >RicB > > >_______________________________________________ >Pianotech list info: https://www.moypiano.com/resources/#archives
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