Posted by Gus Pratt on November 25, 2000 at 15:36:29:
In Reply to: Besson Tuba posted by Brian on November 25, 2000 at 15:13:41:
I believe you have a 3 valve compensating tuba. The way to tell is to look at the backside of the valve cluster. If there is a small loop of tubing on the back of the first valve casing and the second valve casing, then it is compensating. Another way to know, is if the bell is marked Imperial then it is compensating. On 3 valve compensating horns the 3rd valve tubing forms an arch in front of the valve casing, and re-enters the first valve casing.