Author: Micke Isotalo ★2017
Date: 2017-03-01 22:57
dorjepismo: You are right, those Austrian system instruments didn't have a double vented throat Bb. Some makers, as Schwenk & Seggelke offers it as an option for their German and French system instruments, but I can't remember seen it offered for any Austrian system instrument.
Leitner & Kraus offers a smart and quite simple extra venting for the throat A and Bb with a lever connecting the A-key with one of the sidetrill keys. When opening the A-key, also that sidetrill key opens. This is offered only for their German system clarinets, since it doesn't work on the Austrian system. I tried also such a German system instrument, and for me this mechanism made throat A and Bb clearer, but not perfect.
As I understand, the double venting mechanism for the throat Bb on Reform Boehm's is mainly for making it clearer, not primarily for tuning. It also allows for a more ideal positioning and dimensioning of the register tube since it isn't co-acting as the one and only tone hole for the throat Bb.
A question for you: Since you commented above on the Kronthaler's instruments, have you tried their Boehm models? Any review as a separate post, short or long, I believe would be of much interest here. Also any detailed information about their instruments. Their Website doesn't offer anything of interest, and they are otherwise also very secretive not advertising even their email address (like companies with a lot of disputes with their customers, but let's hope that isn't the reason in this case :-) ). You are of course also more than welcome to write privately to me, if you prefer that.
Micke Isotalo
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The Clarinet BBoard
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