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prof5 · 03-04-2005, 10:34 PM

I'm about half done converting an old Bb Elkhart trumpet to C, but I need some input. I've shortened the leadpipe & bell, and am quite happy with the results - tuning and intonation are pretty good. Now it's time to do the valve slides. Any thoughts on a good way to calculate how much to shorten them? By math it should be about 12%, but I'm not sure.

Garry

ps Yes, I know this is a crazy project, and I don't expect much. I am a professional tech though, so the mechanics of it are no problem. It's the math I'm not sure about!

03-04-2005, 10:34 PM	#1 (permalink)
prof5 New Friend Join Date: Mar 2005 Posts: 24	Converting Bb to C, need input! I'm about half done converting an old Bb Elkhart trumpet to C, but I need some input. I've shortened the leadpipe & bell, and am quite happy with the results - tuning and intonation are pretty good. Now it's time to do the valve slides. Any thoughts on a good way to calculate how much to shorten them? By math it should be about 12%, but I'm not sure. Garry ps Yes, I know this is a crazy project, and I don't expect much. I am a professional tech though, so the mechanics of it are no problem. It's the math I'm not sure about!