the schiller American Heritage 6 Valve Rotary F Tuba

[michaelkeys]

I bought a upgraded 6 valve m&m. The F is still way to high. You have to play it using 23 to get it right. (And the lower F is to flat)

[k001k47]

I bought a upgraded 6 valve m&m. The F is still way to high. You have to play it using 23 to get it right. (And the lower F is to flat)

Keep messing with slides and buttons. You'll get it right. I believe in you.

[Lectron]

I bought a upgraded 6 valve m&m. The F is still way to high. You have to play it using 23 to get it right. (And the lower F is to flat)

I'm shocked!
Who would have believed that!

[Lingon]

I bought a upgraded 6 valve m&m. The F is still way to high. You have to play it using 23 to get it right. (And the lower F is to flat)

Interesting, but please enlighten us if you happen to know what is upgraded and in which way it does manifest itself in the instruments behavior, better or worse than the unupgraded version?

[Lingon]

...I am informed by JInBao that they only manufacture one model of the JBFB-600, so if there is an improved version, those improvements must be made post production...

And they are not improving on the original construction over time in the ongoning production, in the way modelerdc suggested?

[Wyvern]

...I am informed by JInBao that they only manufacture one model of the JBFB-600, so if there is an improved version, those improvements must be made post production...

And they are not improving on the original construction over time in the ongoning production, in the way modelerdc suggested?

As far as I can tell, changes/improvements are implemented by the factory as requested by dealers. JinBao seem quite open to implementing as requested and are about to do so to another model for Wessex Tubas as I will announce once I have a successful prototype in my hands.

If anyone can work out what changes are needed to the F tuba to make it play in tune (and modify one as an example to prove), I will happily take to the factory on my next visit to request incorporation in production.

My perception (and it is only perception) is that the expansion after the valves is just too fast and doubt if changing leadpipe is the solution.