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Post by SeaRat on Jan 7, 2014 22:11:02 GMT -8
Guy and Jaybird,
My Calypso I and Calpyso II second stages are both on the same first stage, which is actually a Calypso II (with the newer LP hose port). I use it at times with the Calypso I on a long hose and the Calypso II on a neck strap. I figure to blow some DIR guys' minds if I ever get the chance. I have an inflator hose on it too, as well as a SPG (old style). So it is DIR-compliant, but really, really old. The silicone exhaust mushroom does improve the exhaust resistance, and it also helps that it is right in front of my mouth. Both are on the same IP, but I need to find my gauge to tell you what it is.
My other Calypso is the more modern one, and it has a higher IP, but again it's been several years since I've looked at it and I won't hazard a guess. I'll go out and look for my IP gauge, but because of construction this year it has been moved around and I'm not sure where it is currently.
John
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Post by SeaRat on Jan 7, 2014 22:40:13 GMT -8
Jaybird,
My Calypso I and II are off a Calypso first stage set at 128 psig IP.
John
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Post by sedguy77 on Jan 8, 2014 7:48:36 GMT -8
... it also helps that [the exhaust valve] is right in front of my mouth. John John, This had not occurred to me. That does help explain how that small valve (and with the exhaust air having a ways to travel before venting) can manage to have reasonable WOB numbers. Thanks! Guy
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Post by SeaRat on Jan 8, 2014 8:06:32 GMT -8
Guy, it is a well-known principal in industrial ventilation that when you make a gas turn in a ventilation duct, you create problems in flow. These turbulences cause resistance, and that translates in the Calypso II to higher exhalation resistance. The Calypso III and beyond had a much-increased mushroom to compensate for this, and also in most positions the mushroom opens inside a bubble, and so it is not really exposed to the water. This is because of the extended dome that goes into the exhaust tee.
John
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Post by nikeajax on Jan 8, 2014 10:01:16 GMT -8
Guy, does this help: Jaybird
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Post by SeaRat on Jan 8, 2014 10:25:45 GMT -8
Jaybird, my more modern Calypso (with the piston first stage) is set at ~170 psig for the interstage pressure. I have no other periferals on it, and so set it as high as possible. It breathes wonderfully.
John
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Post by sedguy77 on Jan 8, 2014 14:04:00 GMT -8
Guy, does this help ...? Jaybird Does it ever. So I guess this means that I am going to have to figure a way to get that inlet valve nipple out of there. Well, at least I now have ample reason to do so and it will make LP seat and o-ring replacement MUCH easier in the future. I will give it lots of thought -- and maybe employ a wooden dowel -- before I try to force it out of there. Wish I had some way to get a good hold on the bottom box that would leave me with both hands free. I don't see that happening though. On second thought, maybe I can make a PVC "t" with the right diameter to go around the hard seat. That way I can give it a really good PUSH without risking damage to the volcano orifice. In any case, thanks for all the help. You taking that apart has certainly given me the incentive (and direction) I need to get this back together right. Guy
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Post by sedguy77 on Jan 8, 2014 14:07:53 GMT -8
... in most positions the mushroom opens inside a bubble, and so it is not really exposed to the water. This is because of the extended dome that goes into the exhaust tee. John This likewise did not occur to me. But in this case, I had pondered that development in the Calypso bottom box and wondered why they did it. Nifty idea. Now I am going to have to give other 2nd stages a bit more thought and scrutiny based on this bit of enlightenment. Thanks a lot for this. I don't remember this in either Wolfinger or Harlow. Guy
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Post by nikeajax on Jan 8, 2014 14:55:10 GMT -8
Hey, that's what we're all here for... to learn something new! Sometimes I get what I call "scuba-brain": a problem will keep recycling over, and over 'till I eventually figure something out... Jaybird
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Post by sedguy77 on Jan 8, 2014 18:32:52 GMT -8
Jaybird and John,
My news is only good. With the help of a 6" piece of HP hose (from a blow out), I was able to push while I had a box wrench applying torque and the IVN came out without too much persuasion. Both o-rings are pretty worn, so it is hard to know what my leak was all about. Once I locate a -114 o-ring (I don't keep any of the thicker o-rings around, but I'm hoping my local hardward store does), I'll slap it back together and see what happens.
This has been a very rewarding education on the particulars of the Calypso series.
I'll keep you posted on my progress.
Guy
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Post by sedguy77 on Jan 8, 2014 19:49:21 GMT -8
Adjusting the second stage is really easy as compared to any of the later models. Use a paper-clip to hold the poppet, keep it from rotating while you adjust the lock-nut. In my image, you can see two holes, one is partially covered up by the lever: the poppet has a hole in its shaft too: it's called a disc and retainer in the manual and book, but it's still a poppet! The exhaust valve is a 22-23mm, this is not critical, as either one will work! Get a new silicone one at any dive shop, just tell them it's for a snorkel, other wise they may accuse you of being "51-50" (a danger to yourself and others) if they sell you that part... Jaybird Jaybird and John, Whoo-hoo! It is back together and it is fantastic! The paper clip worked great. I had to scrounge around a LOT in my work room, but I did in fact find a bag of exhaust valves of the right size (didn't even know I had them!) and a -114 o-ring. I couldn't believe my luck. Some might suggest that my lack of awareness is an indication of hoarding, but hey I found them, didn't I? Anyway, it may be so overtuned that it freeflows, but it is an easy breather. Correction, inhaler. As John alluded to, the exhalation effort leaves a bit to be desired. It is noticably harder than I am used to, but no worse, I'd venture, than several of my double hoses. I am sure going to enjoy trying this reg out in the water this spring. In the meantime, I'm creating a display for it, my (unrestored) USD Aquamatic, and an early (restored) Voit Swimaster. Who needs art when you've got vintage regs? Thanks again. Guy
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Post by SeaRat on Jan 10, 2014 8:54:30 GMT -8
Guy, You'll find that in the water it is not really noticeable in most diving situations that the exhalation is harder. At the time, this was the standard opening, and for most usages it does quite well. The last time I had this regulator in the water, I was in the Clackamas River, and was swimming against a fairly high current. As I stated above, the exhalation is better than the Calypso II due to the straight-forward exhaust through the diaphragm. Jaybird and Guy, Now, I'm going to blow your minds with this news--the second generation of the original Calypso was not produced by U.S. Divers or Aqualung; it was produced by Dacor after the patent rights ran out for USD. The Dacor Quantum is the second generation of the original Calypso concept. I have one that I got in parts for a nominal price on E-Bay, put together and mounted on a Dacor Olympic first stage and dove in the Clackamas River last year. It's exhaust through the diaphragm is significantly larger, and inhalation as great (but no, it is slightly smaller than the USD original Calypso, so it cannot be put into the USD version). I'll show some photos later. It's time to hit the pool. John
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Post by nikeajax on Jan 10, 2014 11:51:04 GMT -8
John, I hope you're saying what I think you're saying... can we use a Dacor quantum diaphragm on our C-I's... Please, please, please, please, please say it's so!
Jaybird
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Post by SeaRat on Jan 10, 2014 12:04:47 GMT -8
Jaybird,
Unfortunately, the USD CI diaphragm is about 1/8th inch radius larger than the Dacor Quantum diaphragm. Also, there are projections on the Dacor diaphragm which would need to be dealt with to use it. So it cannot be directly used; it doesn't mean that you cannot try to modify it though, and maybe glue it onto a USD diaphargm. But with so critical a component, I would not recommend it.
John
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Post by nikeajax on Jan 10, 2014 15:41:28 GMT -8
Yeah well... we'd need a different lever too, as the lever in it is very specific to that size valve!
Jaybird
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