Frankly, I don't know. I don't think that air always passing through that piece of tubing. It may pass into it, but without both valves depressed it probably does not pass all the way through. You are correct in saying that it would only effect that pitch as much as a longer third valve slide would. However, if a longer, stationary third valve slide is added, then pitches using third valve alone, and the two and three combination would then be out of tune. When this design was introduced, the only moveable tuning slide on cornets was the main tuning slide. Some of the turn of the century cornets did have a small push rod so it was possible to move the tuning slide a bit while playing, but the third valve and first valve finger rings, to the best of my knowledge, had not been developed at that time this design came out. This construction is supposed to allow for lowering the pitch only for the first and third combination. I've never had a class in physics nor do I build instruments, so hopefully someone can answer this with a more scientifically sound answer.
Conn sold this design as a compensating instrument that would pull the first and third combination down into tune. My Conn Conn-Queror does exactly that. It's not perfect but its very close. Hopefully someone will have more information on the physics of why this works to answer your question more fully. Joyce > date: Sun, 16 Oct 2005 12:20:50 -0700 (PDT) > from: Herbert Foster <[EMAIL PROTECTED]> > > How is this so? The extra length of tube is always in the air path and > won't > afftect the pitch more than having a longer 3rd valve slide would. 3 valve > compensating instruments have extra loops on the 1st & 2nd valves. > > Herb Foster > > --- [EMAIL PROTECTED] wrote: > > > ... > > I'm guessing this was an early type of compensating cornet. > > By connecting 1 and 3 with an extra length of tube, > > you compensate for the relative sharpness of the instrument > > when they are in combination. > > ... > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.12.1/135 - Release Date: 10/15/2005 _______________________________________________ post: horn@music.memphis.edu unsubscribe or set options at http://music2.memphis.edu/mailman/options/horn/archive%40jab.org
