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Re: My Eb Tuba Project

Postby Tubajug » Tue Mar 05, 2019 5:11 pm

bloke wrote:I built a piston F tuba this week out of German, Chinese, and bloke parts. It turned out very nice and (lucky again) plays quite well in tune. I'm going to use it in a brass recital next Sunday (which is "tuba heavy"), since I'm not used to it, and since I'm also not particularly accustomed to playing F tubas with only five valves :P . I also have a Mardi Gras gig tomorrow night, so I'll probably take it - instead of the Eb - to get used to blowing through it.

...no pictures...boring project...and not my thread.


Nice! I'd love to see a little write-up about it. I'm always interested to see what other people put together.
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba in progress

Used to own, but still a fun thread: Lyon & Healy Eb

If at first you don't succeed, skydiving's probably not for you.
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Re: My Eb Tuba Project

Postby roweenie » Tue Mar 05, 2019 7:20 pm

Tubajug wrote:
bloke wrote:I built a piston F tuba this week out of German, Chinese, and bloke parts. It turned out very nice and (lucky again) plays quite well in tune. I'm going to use it in a brass recital next Sunday (which is "tuba heavy"), since I'm not used to it, and since I'm also not particularly accustomed to playing F tubas with only five valves :P . I also have a Mardi Gras gig tomorrow night, so I'll probably take it - instead of the Eb - to get used to blowing through it.

...no pictures...boring project...and not my thread.


Nice! I'd love to see a little write-up about it. I'm always interested to see what other people put together.



Yes, me too - let us be the judge if it's boring or not :wink:
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Re: My Eb Tuba Project

Postby Ken Herrick » Tue Mar 05, 2019 7:24 pm

IfBLOKE says it is boring - it MUST be BORING !!!
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Re: My Eb Tuba Project

Postby bloke » Tue Mar 05, 2019 11:24 pm

stuff that does NOT belong in this thread that bloke wrote:I pushed to finish it before tonight's Mardi Gras gig...I got the bell READY to install (a Made In German Democratic Republic "Perantucci Model" bell - before there was any such thing as a "PT-10"), but just ran out of time...
I walked into the gig (a 55 minute drive away) about 3 seconds late...having made the drive in 42 minutes...and (obviously) did not use the new F tuba. (The Besson Eb was a much better choice for the gig, but - again - I wanted to give the F a test run, as the musicians on the bandstand are "good"...i.e. they play well, and with good intonation.)

Besides the bell, it needs better water keys, additional water keys (on the 90 degree elbows coming out of [piston] casings #'s 3 and 4 - to avoid dumping upper 3 and 4 slides), and I would like to add length to a couple of slides (with longer ferrules with bore-consistency inserts buried within them) and barely shorten the #2.

Even with none of that (and just sticking the friggin' bell permanently in place), it's a great instrument.

It's "boring" because it very strongly resembles a model that already exists...but I didn't have to cough up $12K, and this thing (I believe) plays just a bit better.
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Re: My Eb Tuba Project

Postby Ken Herrick » Wed Mar 06, 2019 2:19 am

Hmmmmm, maybe not so boring. Tell ya what: show us yours and I'll show you mine.
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Re: My Eb Tuba Project

Postby bloke » Wed Mar 06, 2019 9:28 am

Ken Herrick wrote:Hmmmmm, maybe not so boring. Tell ya what: show us yours and I'll show you mine.


email me (signature), and I'll send you a picture or two. The bell goes on after breakfast.
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Re: My Eb Tuba Project

Postby Tubajug » Wed Mar 06, 2019 11:04 pm

It wouldn't be TubeNet if a thread didn't go off the rails now and then. :)
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba in progress

Used to own, but still a fun thread: Lyon & Healy Eb

If at first you don't succeed, skydiving's probably not for you.
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Re: My Eb Tuba Project

Postby Ken Herrick » Thu Mar 07, 2019 1:47 am

Is this a model railway club?
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Re: My Eb Tuba Project

Postby bloke » Sat Mar 09, 2019 9:24 pm

Are you about ready to install your #4 circuit?
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Re: My Eb Tuba Project

Postby Tubajug » Mon Mar 11, 2019 9:38 am

bloke wrote:Are you about ready to install your #4 circuit?


Not quite yet. I'm still trying to figure out how to get it to work with the inner and outer tubing I've got on hand.
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba in progress

Used to own, but still a fun thread: Lyon & Healy Eb

If at first you don't succeed, skydiving's probably not for you.
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Re: My Eb Tuba Project

Postby Tubajug » Wed Mar 13, 2019 8:36 am

I think I've got the configuration for the 4th circuit figured out! Now I'll just need to start measuring and trimming for the final lengths. I'm short on bracing though...
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba in progress

Used to own, but still a fun thread: Lyon & Healy Eb

If at first you don't succeed, skydiving's probably not for you.
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Re: My Eb Tuba Project

Postby KiltieTuba » Wed Mar 13, 2019 9:51 am

What do you need for braces? I’ve got a large ziplock bag full of them.
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Re: My Eb Tuba Project

Postby Tubajug » Tue Mar 19, 2019 12:27 pm

As I mentioned earlier, I think I've got my 4th valve circuit figured out. I did a little mock up and snapped a few photos:


Image

I plan on adjusting the lengths of the two lower tubes in order to bring the whole thing down a bit so it's not sticking up so high on top.
Image

Image

In this photo I've just placed braces where they might go just to look good visually. Is there any acoustical harm to "clustering" braces together like this?
Image

I was pleased that I was able to get the wrap a little more compact than I originally thought.

And finally, I sent the rotor and dogleg off to Dan Schultz for some tweaking. He expanded the end of the dogleg for me and created a ferrule to join the two. He also got the rotor set up in the configuration I wanted. Thanks Dan!
Image

Hopefully I can start getting the 4th circuit soldered together soon. I'm still waiting on getting the bell done, but that's the last part of the body to do. Should bow guards be put on before or after assembling the bows?
Jordan
King 2341 with a Holton "Monster" Eb bell
Eb Frankentuba in progress

Used to own, but still a fun thread: Lyon & Healy Eb

If at first you don't succeed, skydiving's probably not for you.
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Re: My Eb Tuba Project

Postby the elephant » Tue Mar 19, 2019 2:10 pm

I have built stuff with braces intentionally lined up across, worrying that it would create some sort of weird dead zone. It was not an issue. I have intentionally set them up to be offset by up to two inches. No effect. I think much of the brace location voodoo is just that: voodoo. It is not science until someone sets up some way to record the supposed differences and can prove them to be reproducible from horn to horn. Until that is done where differences in the test player's various repetitions and all differences in his face are factored out I will call brace location more of a placebo and less of something to worry about. There are a few locations where this might make a real difference, but it is not in the valve section.

I would have the guard plates and wires on before you assemble the bows into a bugle. Personal preference. (There are reasons, but these come from hands-on experience since everyone plays the flame differently and will have different results.)

By the way, this is starting to look really good. Keep up the work, Jordan. I think you will be pleased at all you learn in the end, and then you can do this to another horn using all this newfound knowledge and skill. Every time improves a bit. Or a lot. ;-)
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