 The Clarinet BBoard
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Author: heroj
Date: 2023-10-22 23:18
Hi,
I got a prodige ABS clarinet quite cheaply, it plays quite well but it has one problem - the f sharp 1 tone is terribly low - a whole 49 cents. It sounds more like F than F sharp. After testing, I found out that the problem is apparently in the thumb tube - the tube is very wide, so I thought of trying to put a narrower tube there (which would widen the thumb hole) to increase the f sharp. But I don't know if it won't also affect the note g 1. Does anyone have experience with the effect that increasing/expanding the thumb stick would have on other notes?
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Author: Chris P
Date: 2023-10-23 01:25
"After testing, I found out that the problem is apparently in the thumb tube - the tube is very wide, so I thought of trying to put a narrower tube there (which would widen the thumb hole) to increase the f sharp"
A narrower diameter thumb tube will FLATTEN the F# with the regular fingering (LH index finger only). Filling in the thumb tube to reduce its diameter will also flatten the F#. Buffet and Buffet-style clarinets usually have around a 7.5mm diameter thumb tube.
The open G will be marginally affected by a change in the diameter of the thumb tube, but not much.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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Author: lydian
Date: 2023-10-23 03:21
He means the diameter of the hole. If that can be changed by reducing wall thickness, I suppose that’s another avenue, albeit a much more impractical one.
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Author: heroj
Date: 2023-10-23 23:54
Burt wrote:
> Do you mean a tube with a thinner wall?
lydian wrote:
> He means the diameter of the hole.
Yes I thing tube with a thinner wall should increase tuning.
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Author: Chris P
Date: 2023-10-24 01:42
Tonehole diameters, or more specifically, the inside diameter of the tonehole is the determining factor when it comes to the tuning of the note issuing directly from that tonehole. The outside diameter of a tonehole chimney or tonehole insert like a thumb tube has no relevance when it comes to tuning.
You can have a narrow diameter tonehole insert/tube with a thin wall thickness just as you can also have a large diameter tonehole insert/tube with a thick wall thickness, or the same diameter tonehole with either a thin or thick wall thickness insert.
Former oboe finisher
Howarth of London
1998 - 2010
The opinions I express are my own.
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