Author: clarnibass
Date: 2010-03-03 03:29
>> so from data in your posts the neck should be about
>> 5 3/8 (136mm) no wonder the intonation is way out!!!.
Not necessarily. AFAIK it's not only Noblet/Normandy/Vito that have the shorter neck. Older Leblanc alto clarinets had this same shorter neck too. If I remember it was about mid 60s that Leblanc changed to the longer goose neck. So your Leblanc is more likely to originally have the shorter curved neck.
BTW I have a Leblanc with the longer neck and throat notes are still mostly sharp, especially Bb. Are you sure your Leblanc is sooo sharp that it really needs a 3cm+ longer neck? It's possible, but how out of tune is it really? Maybe the goose neck affect intonation in more ways than just by its length, but I imagine the difference would be very bad, probably worse than how you described it. But maybe not.
If you can't find a goose neck to try, then unless it will cause a problem with the position of the mouthpiece to the clarinet body, I would consider making the neck tunable, adding a tenon. You decide how much to cut off from the original i.e. how much length the tenon itself would add, before even opening it. Should cost a lot less than making a neck (unless you have some assembly line specifically to make necks).
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