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Post by vance on Oct 3, 2022 7:01:02 GMT -8
James, Are the jets aligned for FX boxes? Your photos show a Trieste box, and the horns are at steeper angles than DAAM type boxes. I don't remember for sure, but believe the jet position has to be adjusted for a bigger top box.
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Post by james1979 on Oct 3, 2022 14:45:01 GMT -8
James, Are the jets aligned for FX boxes? Your photos show a Trieste box, and the horns are at steeper angles than DAAM type boxes. I don't remember for sure, but believe the jet position has to be adjusted for a bigger top box. I've never had my hands on FX cans, so I couldn't tell you for sure. On the bright side, all it takes is a quick edit in the CAD file and I can print it with the jet at any angle... Just need to know the angle needed.
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Post by james1979 on Oct 4, 2022 12:57:05 GMT -8
A bit of Google-Fu shows that the FX cans don't quite line up the venturi, but it looks to be only about 10 degrees off. I'll tweak the design appropriately, and I have a message out to Aquala1 inviting him to be the guinea-pig (I mean beta tester). The modified Conshelf lever works fine in the Trieste cans..... A beta tester will have to verify if it's good in the FX cans.
Respectfully,
James
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Post by vance on Oct 4, 2022 14:51:56 GMT -8
Sorry for no answer, James. I'm a bit under the weather (a cold, not Covid) and didn't have the energy to open up my regs to measure. I should make a drawing of the jet/castle angles we need for these.
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Post by james1979 on Oct 4, 2022 15:02:09 GMT -8
Sorry for no answer, James. I'm a bit under the weather (a cold, not Covid) and didn't have the energy to open up my regs to measure. I should make a drawing of the jet/castle angles we need for these. No worries... Just feel better! I'm eyeballing angles, and can put together a list as I get them dialled in.
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Post by SeaRat on Oct 4, 2022 17:32:19 GMT -8
Sorry for no answer, James. I'm a bit under the weather (a cold, not Covid) and didn't have the energy to open up my regs to measure. I should make a drawing of the jet/castle angles we need for these. Get some rest, renew and heal. I wasn't feeling all that great yesterday, and decided not to go diving. I want to dive the Tualatin River with my 1990s film camera, a Canon F-1N with its Action Finder and 50mm macro lens inside an Ikelite housing. I leak checked it on Sunday, so I'm ready, but I had done a lot of exercising last week, and my body just didn't feel like a dive. So that one's still pending. Instead, I gave blood for the first time since 2005. That's about the only thing I can do to help the people in Florida and Puerto Rice. It's only a pint, but now that I've started again, I will be donating regularly. ARC needs doners by John Ratliff, on Flickr www.redcrossblood.orgJohn
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Post by Aquala1 on Oct 5, 2022 19:45:37 GMT -8
Sorry for no answer, James. I'm a bit under the weather (a cold, not Covid) and didn't have the energy to open up my regs to measure. I should make a drawing of the jet/castle angles we need for these. Get well Phil. Being sick is a drag, and I hope you feel better soon.
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Post by vance on Oct 8, 2022 17:29:41 GMT -8
I just made an HP adapter/J-Valve plug for the Titan II. You can see a rather large hole that would allow the tank to empty pretty quickly if the hose or SPG failed. However, the J-valve assembly (and now the plug) is sealed with a nylon or some kind of plastic washer. I made a new one that has a tiny hole drilled in it, in order to avoid such an occurrence. Any others I make will have the tiny hole in the plug itself, but this piece of brass already had the too large hole in it.
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Post by Aquala1 on Oct 26, 2022 11:47:41 GMT -8
I just made an HP adapter/J-Valve plug for the Titan II. You can see a rather large hole that would allow the tank to empty pretty quickly if the hose or SPG failed. However, the J-valve assembly (and now the plug) is sealed with a nylon or some kind of plastic washer. I made a new one that has a tiny hole drilled in it, in order to avoid such an occurrence. Any others I make will have the tiny hole in the plug itself, but this piece of brass already had the too large hole in it. Phil, would it be possible to machine the same thing into one of Rob’s stainless plugs from The Scuba Museum? Would it save time and effort since the male threads and hex shoulders are already cut, or is machining stainless a royal pain?
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Post by vance on Oct 26, 2022 12:29:51 GMT -8
I have cut an HP port into those plugs before. They were chromed brass, not stainless. If the new ones are stainless, it should still work ok. I wouldn't give my tiny drill bits much chance of surviving stainless, though.
I made some out of hex stock as well. It's not hard to make these. The problem is getting them plated.
I made the one above out of round stock because the piece I made it out of was round and already threaded. I held the threaded end in a collet rather than a 3 jaw chuck to machine the port end. The collet grips the threads all the way around rather than at 3 points. You can really tighten it up w/o damaging the threads.
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Post by vance on Oct 27, 2022 18:50:57 GMT -8
I made one out of hex stock today. It looks a bit rough here, but I cleaned out the debris and spiffed it up some.
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Post by vance on Oct 27, 2022 19:00:54 GMT -8
Here's one of the TSM plugs. Easy enough to drill and tap for an SPG. Bonus is, it's already chromed.
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Post by antique diver on Oct 28, 2022 11:09:38 GMT -8
I don't know if they are hard to find, but if so I have gaskets for those. Also copper crush washers that work on even higher pressures (6000+ psi), but should note that some folks have expressed concerns about the copper and chrome contact being an issue in water.
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Post by SeaRat on Oct 28, 2022 11:18:29 GMT -8
I made one out of hex stock today. It looks a bit rough here, but I cleaned out the debris and spiffed it up some. 'Glad to see that you have kept the hole very, very small. Anyone making this design change, please ensure that you use a very small hole in the middle. You might tell folks what size hole you used too. That's the hazard of home-made designs; the underlying principles may be lost. John
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Post by vance on Oct 28, 2022 15:19:10 GMT -8
What John is referring to here is the need to control HP air in a burst hose/failed gauge situation. The newer SPGs with a 7/16" connector usually had a tiny opening, but the 3/8" high pressure hose fittings had a larger hole (1/8"?).
If the hose or SPG bursts, the tiny hole gives the diver some time to ascend with available air to breathe. The larger opening can empty a tank in moments.
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