Posted by Michael Russo on October 16, 2000 at 00:32:22:
In Reply to: Various Valves posted by Ragin on October 15, 2000 at 23:19:37:
I can't answer question number one, but for question number two...you don't see any of these new vales on tubas becasue part of the deal in having them is that the slides have to be open wrapped. The horn would also have to be able to come completely apart if Thayer valves were used. (That's the only way to take the valve appart!)
It depends on the instrument if there is more resistance noticed when more valves are used. A lot of tubas are now made with a bore size that increases as it goes through the valve set. This help to keep that resistance down. Other horns stay the same size, but because the bore is larger to begin with, you don't notice the resistance as much.
Why do trombones have all these different valve options? Because everyone is different. The more options there are, the better chance a manufactuer has of getting you to try their stuff.