J.c. Sherman wrote:Do you think a kicker on the main tuning slide would provide sufficient throw for the Eb down to B#, and also take care of the sharp 6th partial?
I have a 4V Conn 24I Connstellation that has a main slide kicker. With all 4 valves down and the kicker out ALL of the way, I can just get C-natural in tune. I play Db with 1-3-4 and little kicker and play the rest using standard fingering with a little or no kicker. There is no way to get the low Cb above pedal Bb in tune. To play a Cb, I use 1-2-3-4, kicker, and lip down as much as I can. Even then it still is 20+ cents sharp. The kickers only add 3-4 inches of total tubing (1.5" to 2" on each side of the main slide).
On my Conn (and the YEP321's) the 6th partial (Eb, E, F) is not nearly as sharp as it is on most compensating horns. Thus if sharp at all, the kicker does work nicely. Where the kicker works best is C and Cb above low Bb (not pedal Bb). These notes can be played either 1-3 and 1-2-3 with a bit of kicker, or 4 and 2-4 respectively w/o kicker.
I think you would just have to add too much tubing to get Cb (1-2-3-4) and C-nat (1-3-4) using just kicker. I really don't think you could kick the main slide on a 4V YEP-321 enough to pull the Cb (1-2-3-4) into tune. Then again, maybe I'm wrong.
Doug