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Same horn different valve set orientation

Postby DouglasJB » Sat Jul 08, 2017 8:00 am

While scrolling through used horns I noticed that Baltimore Brass and Dillon both have used Kanstul 66 Eb tubas, both are Front action but the one at Baltimore Brass the valve set is set at a 45° angle where the one at Dillons has a valve set that is set in a vertical row. For a newer horn design (not 20 years old) why does it have 2 different layouts?

If someone who is much better with technology wants to somehow post the pictures side by side it would certainly help those who are interested in seeing the difference.

Thanks Everyone!
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Re: Same horn different valve set orientation

Postby bloke » Sat Jul 08, 2017 9:21 am

Some of the odd-appearing front-action valvesets seen here-and-there (particularly casings 1-2-3) can be identified as clusters originally designed for top-action use with after-engineered exit knuckles so those clusters can also be shoehorned into front-action use.
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Re: Same horn different valve set orientation

Postby YORK-aholic » Sat Jul 08, 2017 10:40 am

The camera angles are different. The silver one is looking almost directly down the valve stems, whereas the lacquered horn is taken as if the camera had moved towards the big end of the bottom bow.

But is is more than that. The horns ARE different. One may have been a prototype or an early model while they were still working things out. Look at the main tuning slides:

I put the two images together, one on top of the other:

https://drive.google.com/file/d/0B9lDP-krmxaBLVpFMW1fdFo0b3c/view?usp=sharing
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Re: Same horn different valve set orientation

Postby the elephant » Sat Jul 08, 2017 11:08 am

The bugle is the same up to where it runs down to the MTS. From the MTS to the receiver it shares little to nothing between the two horns. The CR rotor is the same, the piston set is essentially the same, looking at where the ports are, but some of the port knuckles are oriented differently. Just about every other part differs. Two different tubas on the same frame.
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Re: Same horn different valve set orientation

Postby opus37 » Sun Jul 09, 2017 7:48 am

Try calling Kansul and asking if there were any changes over time to the design. Lee Stofer may have some information too. Look at current pictures from the Kanstul website to see which design is the most current.

I looked at the pictures again and the ones on the Kanstul website. I strongly believe one of these horns is a 33 in BBb and the other is a 66 in Eb. Specifically, the silver one is the 66 S and the brass one is a 33 S.
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Re: Same horn different valve set orientation

Postby KiltieTuba » Sun Jul 09, 2017 11:29 am

opus37 wrote:Try calling Kansul and asking if there were any changes over time to the design. Lee Stofer may have some information too. Look at current pictures from the Kanstul website to see which design is the most current.

I looked at the pictures again and the ones on the Kanstul website. I strongly believe one of these horns is a 33 in BBb and the other is a 66 in Eb. Specifically, the silver one is the 66 S and the brass one is a 33 S.


Where are the extra wraps on the supposed BBb?

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