Posted by Lee Stofer, Jr. on September 30, 2001 at 14:40:39:
In Reply to: Why is it.... posted by Chuck(G) on September 30, 2001 at 11:42:55:
Chuck,
Just thought I'd mention a few things.  1)Making that beast play in tune might be easier with a different sort of mouthpiece.  2)Have you had the instrument checked for leaks, I mean, very thoroughly?  I repaired a Marzan about 4 years ago that had response and intonation problems.  After investigation, it turns out that the seam on the bell side of the leadpipe(well-hidden)was never brazed together.  After brazing and finishing, man, did that horn crank!  There are many places where a tuba could leak.  3)There is a reason why they located the main tuning slide on that horn so that you could continually manipulate it.  A pro trumpet player friend of mine tells me that C trumpets are generally harder to play in tune than Bb, also.  Nature of the beast.  
-Lee Stofer