2+3 5th valve on an F tuba?

[cjk]

so asc-D valve + 2nd valve might actually be a NOT-sharp D-flat...??

exactly. Open low not-sharp D, 2nd valve not sharp Db. It does make sense.

[Doc]

I often have wished for an ascending valve on an instrument.

Tony Clements had Gronitz build him a CC / DD tuba which I think was based on a PCM. He was selling it some time back. Maybe still for sale?

IIRC, the bugle was in DD. The 5th valve put it in CC and was set to be an ascending valve. The 5th valve was engaged by default. You had a 4v CC with an ascending valve to DD.

so asc-D valve + 2nd valve might actually be a NOT-sharp D-flat...??

Wouldn't that be cool? Sounds reasonable. But "reasonable" doesn't always calculate - Some folks think 235 is unreasonable compared to 24Pull. But hey... whatever works, I guess.

Doc (who doesn't mind pulling, but less pulling is better, and not needing to pull is best)

[bone-a-phone]

Several tenor trombones are built in C with a Bb valve that's normally engaged. They made some basses like that with a regular F valve in addition to the ascending valve. The idea is that low C and B now become pedal tones in 1st and 2nd positions with the Bb valve disengaged. It gives you the full range with less weight.

[bloke]

Several tenor trombones are built in C with a Bb valve that's normally engaged. They made some basses like that with a regular F valve in addition to the ascending valve. The idea is that low C and B now become pedal tones in 1st and 2nd positions with the Bb valve disengaged. It gives you the full range with less weight.

https://cderksen.home.xs4all.nl/Conn60H1914image.html

bloke "Just don't play any 'racist" glissandi or "of-the-Devil" locrian mode tunes (ex: 3rd mvt. of John Williams tuba-thing)."

[bone-a-phone]

Several tenor trombones are built in C with a Bb valve that's normally engaged. They made some basses like that with a regular F valve in addition to the ascending valve. The idea is that low C and B now become pedal tones in 1st and 2nd positions with the Bb valve disengaged. It gives you the full range with less weight.

https://cderksen.home.xs4all.nl/Conn60H1914image.html

bloke "Just don't play any 'racist" glissandi or "of-the-Devil" locrian mode tunes (ex: 3rd mvt. of John Williams tuba-thing)."

Yeah, and more pedestrian stuff too, like https://usa.yamaha.com/products/musical ... index.html

The bass incarnation https://photos.google.com/share/AF1QipO ... V6Tnd6UnNR
also had roots in a european production model,