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Talking to "numbers people" and referring to "my own experience, and with no numbers", that person and I are necessarily going to talk past each other. I find - via experience - that playing either crazy-tall-belled tubas or bell-front tubas provides the same challenge: operator...

Anything that would be exponential or radial or whatever would be in the bell section, and only the part that has a compound curve. Everything else will be roughly conical, though maybe with cusps where the rate of conicity changes. Those numbers were from an existing tuba, a BBb Kalison 2000. Bell...

Anything that would be exponential or radial or whatever would be in the bell section, and only the part that has a compound curve. Everything else will be roughly conical, though maybe with cusps where the rate of conicity changes. Wide, shallow flares provide a different impedance match to the ro...

That's true 6/4 Rudy and a 6/4 American style.. You can hardly see the difference. :smilie8: Ah yes, try removing your rose colored glasses perhaps. :coffee: Still can't see it, must be blind. https://www.funny-emoticons.com/files/smileys-emoticons/funny-emoticons/116-blind-love.png

So from my example of a bell volume of 20 to 25 liters the extra volume can be something around 10 liters maximum. A Conn 2Xj has a very larger bell but it opens up very late so the extra volume isn't going to be that big. Yes, that's how the 2XJ looks to me, too, compared to a Holton - two indispu...

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KingTuba1241X wrote: ↑Wed Jan 20, 2021 7:09 pm

Don't understand your question and I don't know the 2 tubas in your picture.

That's true 6/4 Rudy and a 6/4 American style..

You can hardly see the difference.

Filling with water from tuning slide to bell is the easiest way to measure the volume. And it is going to be rather accurate since water isn't bother with the shape of the tubing being conical, hyperbolic... It measures the volume accurately, but so what? Does a unit of volume in the bell have the ...

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....It's also better than filling up your tuba with beer, water, or whatever. Oh yeah?? Says who?? :slap: Filling with water from tuning slide to bell is the easiest way to measure the volume. And it is going to be rather accurate since water isn't bothered with the shape of the tubing being conica...

sorry...no charts/graphs/numbers (and I respect and am fascinated by them)...but (only relying on observations, memory, personal anecdotal, and the like...) If an ancient Conn 36J is a "grand orchestral" (yes...?? no...??) tuba (am I wrong, that this was the first tuba with that sort of d...