Donn, a Kalison 2000 would most definitely be called a 6/4 in most parts of the world. But it would be okay if someone called it a 5/4 too. And in fact that's where it ended up in a recent discussion on this subject, in this part of the world, so ... possibly, but I think "most definitely"...

Well as they say "The Burden of Proof lay with the claimant"..he's definitely incorrect on his definition and if he wants to defend it with an explanation of why he can. The standards are fairly clear how to determine this. Well you claimed the debate and what he said in it so... But that...

Yes, the length from the bell end to that first joint can vary, and it can make a difference. The tuba I wanted to measure, a BBb Kalison 2000, turned out to be only 18 inches the first time I measured, but measuring a little closer to the large end of the tenon boosted it to 18½ inches! Is it 6/4?...

Well sure does, he was selling a St.Petersburg a couple years ago on his website and I remember the debate very distinctly. Perhaps you can invite him here to defend his position and provide his opinion. Maybe you could point out the thread with this debate. Well as they say "The Burden of Pro...

Seems rather odd that Uwe would call the St.Pete a 6/4 since on his site you can read that the standard measurement was the Voight-weite that would go from 1 to 16, With 16 the biggest tuba that was playable. And biggest meant total volume of air inside the tuba. He also meantioned being at the fac...

It's 2021. We tuba players have figured this out by now. 18.5 inch circumference or more at the bottom of your bell before the tenon will result in something we can most likely agree is a 6/4 tuba. That is the best method I know of. Yes there may be an oddball exception. The Holtons, Conns, Yorks, ...

most kaisers are 5/4 when compared to american style 6/4's If you're just talking about the diameter girth of the bugle itself (mid-lower bell stack at the first ferrule, bottom bow, and 1st branch) you'd be correct. I know Uwe Schneider mistakenly calls a St. Petersburg tuba a "6/4" beca...

Kaisers are most often referred to as 5/4 in the US. Big piston York like tubas with a bell throat over 18.5 inches are known as 6/4 horns. Bell size doesn't really factor. Nice playing! Where do you measure the bell throat? A kaiser is longer from bell to first bow then a York. Isn't the size dete...

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