Author: Gordon (NZ)
Date: 2007-10-07 23:24
"I took the instrument to Guy Chadash, who replaced the bore in the upper joint with a hard rubber bore, restoring the dimensions to their original Buffet specifications; this was after Guy had measured the interior dimensions at the top of my upper joint, and found them to be very expanded.
There was an immediate and dramatic improvement in the tone and resistance of the instrument. "
My question is, was the improvement doe to one or the other or both of these, and I suppose we will never know:
1. The change to the bore.
2. The re-undercutting of the tone holes.
I suspect that at least some of 'blowout' is because mineral deposits and lint have built up over the surface of the undercutting of the tone holes (as alluded to in the original post). The mineral deposits can be very hard, not unlike stalactite material, and not touched by normal cleaning procedures.
Without special equipment, this is build-up is pretty well impossible to see, and very few technicians would have the fraising tools and the confidence/know-how to include re-fraising in an overhaul.
I do my best with scraping &/or brushing, even wire brushing with gun brushes at times, but not re-fraising as such. To do this also runs some risk of altering an instrument from what a player has become used to, and being castigated for it.
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The Clarinet BBoard
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