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Post by vance on Feb 14, 2023 19:14:39 GMT -8
No, actually, it's a 100 (200?).
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Post by vance on Feb 22, 2023 17:12:47 GMT -8
I'm still staring at the partially assembled Dacor 1-200/1085 DH conversion sitting on my desk. For some reason, I can't find one of the several main diaphragms I know I have for this. I'm very curious about the performance potential of this conversion, but I have to dig deep to find those diaphragms!
When I find them, I'll assemble it all and test it. Hopefully, it will become summer again someday (hard to imagine), and we'll get some pool test results.
Unfortunately, I got other stuff going on, so it might take a while.
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Post by vance on Feb 28, 2023 15:42:01 GMT -8
I found a diaphragm and put the SingleDouble together this afternoon. After a bit of fiddling with my first stage, poppet seat, and spring, I put it on a tank and tried it. As James said, the venturi isn't stellar, but it isn't bad. It could use a bit of a boost. I'll look into it sometime, when I can get to it. It looks pretty cool! Def won't be too many of these at your dive site!   |
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Post by vance on Apr 7, 2023 16:05:08 GMT -8
So, James sent me two first stage clamps. One fits the Dacor unbalanced 1st stage above, but the other one fits a Conshelf VI. I didn't see how it worked at the time, but I figured it out and it does fit well. This upgrades my singledouble to balanced.
I am convinced that an MR12 2nd with the venturi tube would be the ideal regulator for this project. It would be possible to improve the 1085s performance by making air directors, enlarging jets, etc., but wouldn't it be cool to have a major league performer made out of a couple of 3D parts?
I guess you have to include the short LP hose in the parts list, but what I want for this project is something that is easily done by someone who has no experience in making mods.
Plug and play, eh?
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Post by james1979 on Apr 29, 2023 9:42:04 GMT -8
Well, I just tried mine (Conshelf XI first stage) in the pool..... It started out actually pretty good, but then I started to notice a pulse on the inhale. Best I can tell it was the hose contracting as I started to inhale, followed by it opening, venturi kicking in, filling the hose, and repeat. I think raising the IP on the first stage to lower the cracking pressure will prevent the initial contraction of the hose and stop the pulsing. Outside of that, I worked surprisingly well!
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Post by nikeajax on Apr 29, 2023 10:20:01 GMT -8
James, check your HP-seat, just to make sure: I had a Connie do that to me, pulse/flutter, and it was the seat.
JB
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Post by vance on Jun 1, 2023 13:47:33 GMT -8
I just pulled the trigger on some MR12 II or III second stage bodies plus assorted parts. These have the vortex assist tubes, which boost the venturi.
It looks like there's one complete unit minus the cover, and one body with some second stage parts lacking a cover and clamp ring. This is just the ticket for the MR12 Single/Double!
The exhaust tee mount on these requires some thought for the first stage clamp and how to block the exhaust port. I don't know if the cover for this and the Conshelf are different diameters (probably), so the cover/exhaust horn ass'y may need to be revised.
I have mentioned (ad nauseum) that the MR12s with venturi assist are too forceful for me, but the Single/Double could use some more ooomph.
I think the MR12 II/III is a better base for this mod than the Conshelf. The whole point is to make a simple DH conversion that works very well with the addition of a few parts.
Hopefully, this'll do 'er!
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Post by james1979 on Jun 1, 2023 14:45:34 GMT -8
Phil,
I'll try to get on the redesign (both cover and clamp assembly). Life is a tad on the busy side, so it may take me a bit. I do have MR12's on the shelf-o-stuff, so I at least can take measurements handily!
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Post by SeaRat on Jun 1, 2023 15:34:53 GMT -8
Two different angles: 45 degree  30 degree  James, is this still a possibility for my Dacor Quntum single/double hose conversion? John |
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Post by james1979 on Jun 1, 2023 15:38:32 GMT -8
Two different angles: 45 degree 30 degree James, is this still a possibility for my Dacor Quntum single/double hose conversion? John Well, I knew I lost something in the mix! I apologize for loosing track of that, John. Absolutely will still do that (now that I've been reminded, lol). There will be a delay, because I did try printing it once on my usual printer and it just has too many over hangs for a clean print. My other printer can do supports in a different material (which will be perfect for this), but the hot end just failed on it this week. I need to rebuild that hot end, and then I'll get that going as the first project on it. Respectfully, James |
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Post by SeaRat on Jun 1, 2023 15:49:50 GMT -8
James,
Not a problem, just didn’t want it lost. Time is not an issue. Take your time with this part of the project.
John
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Post by vance on Jun 1, 2023 17:44:20 GMT -8
Phil, I'll try to get on the redesign (both cover and clamp assembly). Life is a tad on the busy side, so it may take me a bit. I do have MR12's on the shelf-o-stuff, so I at least can take measurements handily! Thanks, never a hurry. |
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Post by vance on Jun 1, 2023 17:47:39 GMT -8
I am on pins and needles to see John's take on the Single/Double. As I said, I'm not itching to do one of this design, but I do want to see one!
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Post by vance on Jun 9, 2023 16:25:19 GMT -8
I bought a couple of incomplete MR12 bodies with the vortex tube. These are perfect for the single/double which needs a modded exhaust horn cover for the MR12.
Hopefully, the vortex assist tube will make this a great regulator!
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Post by SeaRat on Jun 19, 2023 15:54:37 GMT -8
James and all, I just conducted a very simply test of my concept of using a double hose regulator hose loop on a single hose mouthpiece. I used both a Dacor Quatro and a MR-12 III second stage (I just happen to have each without mouthpieces and as a single unit). First to test was the Dacor. It worked well, but slightly decreased Venturi. The Venturi of the Dacor second stage is aimed directly down the diver's mouth. Because of this, it is also aimed directly down the intake hose of the double hose loop. This was on a Dacor first stage. The MR-12 III second stage was on my Mark III/Aquamaster first stage. The hose fit snugly, but when I inhaled there was a weird vibration coming from the diaphragm. I tried it again, and got the same weird vibration. After the third try, I decided that the type of vortex used for this second stage, which was fine when I put it onto my mouth, would not work for the single to double hose conversion we are desiring. I'd be interested in whether James' experience will be the same.  IMG_1284 by John Ratliff, on Flickr John |
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