On 9/9/2012 6:09 PM, Gene Nelson wrote: > > After calculating a new scale, I have the lower tenor part of the bridge > figured ok - adding 5 bi-chords and a shorter aux bridge joined to the > original. > However, the upper tenor to the top is another question. >>From note 53 to the lo-tenor works out very well but note 54 to the top > requires that I lengthen the spl's by 10mm tapering to 3mm in order to get a > decent scale. Means a big dog leg at the strut. not an uncommon need, by a long shot. > I thought of adding material to the back side of the bridge and machining > the opposite to keep the bridge width close to original. That's exactly what I'd do if I was reusing the old bridge. Make sure it will either clear the plate, or that you can grind the necessary plate clearance. > Or - possibly cutting the bridge at the strut, repositioning 3mm back at the > top and just rotating it to get the 10 mm at the strut, then rejoining with > epoxy and a new bridge cap and maybe a couple of filler pieces to help round > it off at the dog leg. Anybody think that cutting the bridge like that would > be a bad idea?? It's probably a bit less work. I wouldn't separate the bridge. I'd keep as much of the continuous structure of the original as I could by scabbing the back side,with a stack of say, 2.5-3mm slabs, shaping the new curve, recontouring the front to parallel, and recapping the whole thing. Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC