Klarinet Archive - Posting 000659.txt from 2000/10

From: GrabnerWG@-----.com
Subj: Re: [kl] Sharp Clarion A, B & C on A clarinet
Date: Thu, 12 Oct 2000 09:39:11 -0400

In a message dated 10/12/00 12:25:17 AM Central Daylight Time,
reedman@-----.com writes:

<< Someone suggested changing register tubes. Was your clarinet ever worked
on by Brannen? His standard fix for the unstable "A" is to shorten the
register tube. He usually shortens them too much (IMO) and this raises the
pitch of of A. B and C. The standard length for a Buffet R-13 register tube
is .580" I cut these down to .560" If it is shorter than that, this may be
part of your problem.>>

No Brannen has not worked on my "A". I prefer to do my own work. I had not
considered cutting down the register tube. What exactly does this accomplish?

Clark says: <<Try lowering the pad over the vent as low as you can tolerate
(just before the throat Bb becomes too muffled). You can usually lower the
pitch of the A, B and C by 5 cents this way. >>

I had not tried this. I believe I will, as my "solution" set-up only works at
A-440. The sharper notes can also be a problem when I play at 442.

The thing that worked for me was narrowing the bore of the barrel. I DID have
to pull out as I was using a 65 mm barrel. Basically, what I did do was
simulate a longer, but reduced diameter reverse taper conical bore.

I got the idea from Lee Gibson's book.

I also DID pull out at the top of the barrel. I made my own tuning ring to
fit. For some reason, I needed to pull out LESS there, and it seemed to
create less disruption of the scale.

Comments, Clark?

Walter

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