[Trombone-l] Problem With My Elkhart Conn 72H -- Update

[John Cather]

Yes, I've seen lots of these types of problems, even from top grade  
horns. My own 88h had a huge solder blob near the main tuning slide.

Kudos to John for finding this stuff! My guess is that the solder  
blobs, unless huge, are not the main problem. They will affect a note  
or a few notes only as they interrupt an acoustic nodal area. the  
exception is if the blob is between the mouthpiece and the end of the  
upper/inner slide. Then it could affect all or a series of notes.  
Same goes for dents-unless huge they don't have a large effect on  
playability. The valve alignment affects 4 areas at once (with valve  
engaged) or two areas with valve not engaged. More likely to have a  
general affect on general playability. A solder blob would have to be  
huge to have a similar effect as a valve moderately misaligned. The  
compression leakage might also play a role.

I hope John can get your 72h playing like it should. It's nice to  
have a technician who is also a player. I think it makes a big  
difference.

Cheers,
John Cather

On Aug 17, 2007, at 10:00 AM, t.stone at att.net wrote:

> I don't know if any of you have ever experienced anything like this  
> with any of your horns, or if you are really interested in hearing  
> about the outcome of this little misadventure I'm having with my  
> 72H. If so, I'll keep you posted (no pun intended -- really, I mean  
> it). If not, I'll take the cue.
>
> Thanks all!
>
> Tim Stone
> t.stone at att.net
> Northridge, CA