I'm looking for advice or knowledge about the valve set up of a Olds Tuba, 0-99-41 made about 1971. Was the Olds tubas that were put together back in the 1970s use the same pistons for the 3rd & 4th valves?
Just discovered that the 4th valve (cylinder 4) is stamped 3 on top of the piston. There are two 3rd pistons on this tuba.
I switched valves 3 & 4 and the tuba is still blows flat, everything still works. Yes, it's strange that it's possible to switch the 3rd & 4th piston. Also, there are very little leaks if any either way if the pistons are switched.
The 3rd valve is very flat, about 50 cents flat. This causes any 2-3 valve combination to be very flat. I like this horn, just want Gb & Db to play in tune.
Overall tuning on this tuba is good. The open overtone series is good, 1st, 2nd, 4th valve overtones are very good.
If the tuba is suppose to have a valve 4 (stamped 4 on top of the piston) in the 4th valve), any tips/ideas who makes a 4th valve for this Olds?
Any advice, tips, experience, wisdom would be welcome.
Musically,
Eric