 The Clarinet BBoard
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Author: kev182
Date: 2012-03-25 03:03
Does anyone know the typical measurement range for the upper joint entry bore of R13 A clarinets?
I have a prestige A I'm trying that measures .593 (new clarinet)
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Author: SteveG_CT
Date: 2012-03-25 03:31
kev182 wrote:
> Does anyone know the typical measurement range for the upper
> joint entry bore of R13 A clarinets?
>
> I have a prestige A I'm trying that measures .593 (new
> clarinet)
Seems quite large (15mm) for a Buffet. IIRC R13's are typically ~14.8mm at the top and ~14.6mm at the bottom of the upper joint. Does the clarinet play well and have good intonation? If so then I wouldn't be too concerned about whether the bore is to spec or not.
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Author: kev182
Date: 2012-03-25 03:45
I thought it seemed a bit large as well. Overall intonation is decent, although the upper left hand becomes increasingly sharp as it moves up to high C....
VERY Frustrating that Buffet would ream out a beautiful sounding piece of wood too lage... especially on a prestige model...
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Author: Wes
Date: 2012-03-25 16:42
The top end of my Buffet R13 A clarinet from about 1998 measures right now as 0.589, at about 65 to 70 degrees F, not warmed up. It has great sound and intonation and I may play it in a quintet in about two hours. This was measured with a telescoping hole gauge and a micrometer. The four thousands of an inch difference is about the thickness of a piece of printer paper. A new clarinet will probably shrink a little as it ages. Good luck!
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Author: Wes
Date: 2012-03-25 17:10
To clarify the above opinion, I suspect that the new clarinet body will actually expand a little with moisture from playing, making the bore a little smaller.
I saw this with a new-old stock 1971 R13 which I bought like new in 1993. The pitch was a little high at first, but playing it caused the bore to decrease slightly, lowering the pitch to a normal 440.
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Author: kev182
Date: 2012-03-27 07:23
How long did it take before you started seeing the pitch drop?
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Author: Alseg
Date: 2012-03-27 14:09
Be sure to measure it in several diameters.
The entry into the upper joint will be wider than the exit of the barrel, but your measurement seems wider than I would expect.
FWIW at the entrance of the upper joint of my vintalge (new model c. 2005) R13 A-clarinet measures 0.5885 and 0.5890 at 70 deg. F, 40% Humidity (also digital gauge calibrated against a nearly zero environment). [West German comparitor digital spring caliper using a brass/steel ring standard at 0.5000+/-0.00005]
.
Former creator of CUSTOM CLARINET TUNING BARRELS by DR. ALLAN SEGAL
-Where the Sound Matters Most(tm)-
Post Edited (2012-03-28 15:04)
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Author: Bob Phillips
Date: 2012-03-28 03:10
I had an R13 A with the upper end of the upper joint reamed too large, and it was impossible to play in tune in the high clarion, getting sharper and sharper as the Thumb C was approached.
I learned that its bore was .004 in larger than standard, and a number of R13 A's were shipped with the oversized upper bore. No way to replace the lost sawdust --although, conceptually boring the upper joint oversized, shimming it down with an inert and re-reaming was possible --if costly, etc.
I was able to make the instrument playable (but not enjoyable) by using a severely reverse tapered barrel and a Vandoren -13 series mouthpiece.
Good luck
Bob Phillips
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Author: Alseg
Date: 2012-03-28 15:06
Hmm.......sounds like the Bb reamers got into the A reamer slots.
(think about that for awhile)
.
Former creator of CUSTOM CLARINET TUNING BARRELS by DR. ALLAN SEGAL
-Where the Sound Matters Most(tm)-
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