S.E. Shires tru-bore™ valve

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LarryPrestonRoberson
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S.E. Shires tru-bore™ valve

Post by LarryPrestonRoberson » Mon Jul 02, 2018 5:27 pm

I wasn’t sure which sub-forum in which to post this. Sorry, if it’s the wrong place.

Anyway, I’m soliciting opinions about the S.E. Shires tru-bore™ valve for tenor trombone. Specifically, how does the throw (actuation) compare to that of traditional and axial valves? I know the flow/blow is supposed to be a compromise between traditional and axial valves. What I’m more concerned with is the actuation. I love my Instrument Innovations axial valve—the only axial I’ve ever liked. But, I cannot get used to the throw; I’ve played traditional rotors for years. Obviously, it is always best to try before you buy, but I have the option to buy a used tru-bore valve at a great price. So, I’m curious about others who have tried the tru-bore valve. I especially welcome input from players who have also played traditional and axial valves and can offer a comparison of the throw/actuation of all three valve types. Thanks!
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Neo Bri
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Re: S.E. Shires tru-bore™ valve

Post by Neo Bri » Mon Jul 02, 2018 5:34 pm

I feel that Tru-Bores have a very short throw and a very tight spring. I also feel that, for some reason (possibly the lateral pressure of the tight spring) the screw holding the lever onto the brace seems to like to back out. I've had several.
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mrdeacon
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Re: S.E. Shires tru-bore™ valve

Post by mrdeacon » Mon Jul 02, 2018 7:39 pm

The throw is very nice. A tad longer then rotors but way shorter then axials. The blow is different... in a good and bad way... some people like then some people don't. I spent a lot of time in my undergrad on a dependent set for bass and decided they weren't for me.

Just a heads up, for some people they are very unergonomic. Where the F attachment lever is placed is in a bad place for some people. At least the older bass sets were all pretty funky maybe the tenor setups aren't as wacky.

It might be worth it to look into getting the throw adjusted on your axial valves. If you like the blow that much you should try adjusting the throw and see if you can get a easy fix there. They'll still have a longer throw but you get them to have a less ridiculous throw.
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pompatus
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Re: S.E. Shires tru-bore™ valve

Post by pompatus » Mon Jul 02, 2018 11:12 pm

Neo Bri wrote:
Mon Jul 02, 2018 5:34 pm
...I also feel that, for some reason (possibly the lateral pressure of the tight spring) the screw holding the lever onto the brace seems to like to back out...
The ones I’ve tried out, on friend’s horns, have all had issues with the screw frequently backing out. Without fail the screw would back out and make the linkage bind. Make sure to keep an appropriately sized screwdriver in your case.
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Burgerbob
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Re: S.E. Shires tru-bore™ valve

Post by Burgerbob » Mon Jul 02, 2018 11:15 pm

Have you had the throw on your axial worked on?
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elmsandr
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Re: S.E. Shires tru-bore™ valve

Post by elmsandr » Tue Jul 03, 2018 5:49 am

So, I have two Trubore valve sets... Both Bass. One a single, the other a dependent. I have none of the screw issues mentioned, but I will note that I had to adapt each of these valve sets to an existing horn, so the saddles were moved to different braces. Maybe I did something in that process that made it not back out. dunno.

The throw is nice, for comparison to my other horns, it is shorter than my axials by a mile, and it is also shorter than the under the thumb Bach rotor I have.

If you want to stick with your Instrument Innovations axial, they have an improved lever and linkage set for them. If you do not have one of those, maybe give that a try first. Definitely less expensive than a new valve section.

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Matt K
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Re: S.E. Shires tru-bore™ valve

Post by Matt K » Tue Jul 03, 2018 7:06 am

The throw is really short on them but they require a pretty decent amount of maintenance to make their action smooth. AI also don't like the positioning of the lower tube. I play with a thumb rest and it gets in the way of it. I love the way they play otherwise and if it weren't for those two things, I'd still probably be playing on one.


Their basses do a sort-of German wrap where the initial port goes up instead of bending back:
The attachment bass_trubores.gif is no longer available

I think if their tenors were like this, I'd probably not have sold the one that I played for nearly 5 years.
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Matt K
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Re: S.E. Shires tru-bore™ valve

Post by Matt K » Tue Jul 03, 2018 7:07 am

Tenor, for comparison:
.
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mrdeacon
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Re: S.E. Shires tru-bore™ valve

Post by mrdeacon » Tue Jul 03, 2018 1:30 pm

Matt K wrote:
Tue Jul 03, 2018 7:06 am
I also don't like the positioning of the lower tube. I play with a thumb rest and it gets in the way of it. I love the way they play otherwise and if it weren't for those two things, I'd still probably be playing on one.
I wish I had taken a picture when I had the set... but I had John Sandhagen modify my bass set so that F trigger was placed higher then the stock setup.

So you know how the stock trigger is positioned really low? John rotated the main brace with the saddle on it out, made a new set of levers which was longer (but the throw was actually even shorter) that went over the lower tubing instead of through it (this was possible because the main brace was rotated out), and positioned the trigger paddle so it was higher like a stock set of rotors.

That might not make sense with words... but trust me it worked haha. The stock Shires setup just seemed really lazy to me... like they put all this work into designing a new valve set and randomly slapped a f trigger on the valve set and called it a day.
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