Posted by From the catalogue on September 17, 2002 at 16:01:00:
In Reply to: Re: Re: Re: Re: Re: What F tuba do most professionals prefer posted by Frederick J. Young on September 17, 2002 at 15:05:46:
By principle: Yes!
By design: Hardly.
The illustration is taken from an Alexander catalogue about 17 years old.
It will tell, that the shift valve is located before the 4 valve cluster. As the visible valve slides are, very likely, the F valves, this fact implicates, that the 20.5 mm CC bore comp tubing is placed earlier in the total loop, than is the 18.5 mm F valve bore. Reversed step bore is not one of my favourite design elements.
The B&H/Besson compers and their plenitude of clones all have the shift valve after the main 3 valves to allow for an optimum in conical bore development.
Klaus
PS: The next posting will give you a recent photo of a sample of this model.