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Post by technidiver on Feb 8, 2019 5:15:24 GMT -8
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Post by scubalawyer on Feb 8, 2019 6:25:51 GMT -8
TD, Now I don't want to create controversy, as I know a lot of folks really like the Trieste and many say they have rebuilt them successfully and they breathe great. My personal experience with them has not been so great. Let's just say I picked up a mint condition Trieste for $1 last year in the dollar bin at a local swap meet. I think I overpaid. They are easy to rebuild but try as I might I can't get it to breathe much better than sitting at the bottom of a pool trying to suck air through a garden hose. I exaggerate somewhat, but you get the idea.YMMV. My 2psi. M   |
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Post by technidiver on Feb 8, 2019 7:01:00 GMT -8
TD, Now I don't want to create controversy, as I know a lot of folks really like the Trieste and many say they have rebuilt them successfully and they breathe great. My personal experience with them has not been so great. Let's just say I picked up a mint condition Trieste for $1 last year in the dollar bin at a local swap meet. I think I overpaid. They are easy to rebuild but try as I might I can't get it to breathe much better than sitting at the bottom of a pool trying to suck air through a garden hose. I exaggerate somewhat, but you get the idea.YMMV. My 2psi. M That's a cheap Garden Hose! Mark, would you consider selling it, or is this reg just a wall hanger for you?? TD |
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Post by Deleted on Feb 8, 2019 7:25:30 GMT -8
My truth iz, there are'nt many good breathing two hose regulators out there,
that have'nt been tweaked this way or that. I've never had the good fortune
to dive all of them, let alone many, but like a few on this forum, I think a Mistral is really
hard to beat "outta the box" for diving if your hunting for a decent performer.
That sed, I like and dive Dacor pretty much exclusively when I opt for two hose.
Reason behind this,..I like Dacor products more than any of the others, win lose
or draw even with their short comings, and talk about harder breathing..;-)
My point here is,.. I think that a part of my "vintage dive" quest is simply to dive what was
available back in the day, as it was, and for the genuine love/experience of doing so.
(quick disclaimer - after it has been thoroughly inspected and qualified for use.)
If I did'nt have so many irons in the fire, I too might be looking at picking up a Trieste
just for the sake of having one. Go for it TD!
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Post by scubalawyer on Feb 8, 2019 7:43:46 GMT -8
Hi TD, I only have two "wall-hangers": my 2006 USD Reissued Mistral and the Trieste. They both work mind you, but not really well and I don't like to work very hard at anything, let alone breathing.  All my other DH regs I use on a regular badis and breathe fantastic (with a few tweaks here and there - Cyclone 1st stages, HPR 2nds, etc...) I'm keeping the Trieste as part of my collection, at least for now. My three great breathing single stage regs are, in order, 1. HW Gold Label, 2. 1958 Mistral, and 3. 1961 Voit 50 Fathom chrome can. M |
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Post by crabbyjim on Feb 8, 2019 8:21:00 GMT -8
I have two Triestes, one looks like the one in the picture but has been tweeked and one is in a set of FX cans. Is it a good deal? Depends on what you plan to do with it. There is at least one thread here that goes into the good and the bad of that design. Searat and Luis (among others) have written about them here.
I have had both of mine in the pool and while the "original" configuration breathes OK, the Trieste in the FX cans is as good as any other that I have tried. I use my USD horse collar because the extra ports are on the diver's right side, just like the USD Calypso IV and Calypso J.
The Trieste was one of the first double hose regulators with an hp and an lp port. The flaws in the design include a small, oddly shaped diaphragm and poor airflow internally, again, the contributors to this forum have provided a lot of information on that subject here.
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Post by Deleted on Feb 8, 2019 9:50:30 GMT -8
My truth iz, there are'nt many good breathing two hose regulators out there, Howard, Just what are you looking for in a good breathing DHR? Ol'mossback. |
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Post by SeaRat on Feb 8, 2019 12:23:54 GMT -8
I have documented the problems with the Trieste on several occasions here. This is one: vintagescuba.proboards.com/thread/493/re-engineering-modifying-vintage-scubaIs this a good deal? It seems a bit expensive to me, and in order to get this regulator into a very good performing regulator, you are going to have to dedicate some significant time to it. But, if you do, you will have a very unique regulator. The one I have is amougst my best/performing regulators, but not when I bought it New in about 1975. At that time, it could not even compete with a Healthways second-generation Scuba regulator that Midge Cramer was using in his NAUI Scuba class at Oregon State University. John |
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Post by nikeajax on Feb 8, 2019 13:23:17 GMT -8
TD, that seems pretty steep to me, especially since it has Dacor hoses, and not the Voit/USD. People get nostalgic about Voit because of Sea Hunt, and when people get nostalgic/sentimental they become more willing to let themselves be taken advantage of.
Example: how much are people will to pay for a 1957 Chevrolet Bel Air, or 1964-65 Ford Mustang? Neither of these cars are particularly great, actually they were on the cheap end, but now they go for insane amounts of money.
JB
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Post by vance on Feb 8, 2019 15:31:48 GMT -8
Mark,
I'll triple your money. $3. Cash. And pay shipping. Unless you want to bring it to me in Monterey later this year!
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Post by SeaRat on Feb 8, 2019 16:13:22 GMT -8
Here's what I posted in 2005 about the Trieste II, along with photo documentation, since getting back a ways is more difficult now: Engineering Problems The Trieste II was a very advanced design, which never got off the ground. It did not become a popular regulator, and did not displace the DA Aquamaster or Royal Aquamaster from that spot as the most visible two-hose regulator around. It did provide some things that the DA Aquamaster and Royal Aquamaster did not, including the ability to put a "J" reserve on the regulator, HP and LP ports, and a compact style. Design limitations were its downfall though, and here are the ones I have identified: --Diaphragm with a built-in "set" which caused higher than necessary breathing resistance. --A poorly designed venturi system, which sent too much air into the case, and not enough down the intake hose. --A second stage valve housing (Item 21, the LP seat holder) that had a set screw in the body which did not hold it in the ideal position, pointed directly down the intake hose. --No LP outlet for the left side of the regulator. Engineering solutions --Built a new diaphragm out of rubberized fabric, without any resistence to movement.   --Blocked off the back hole enlarged the other side hole.    --Checked position of the second stage valve holder before closing the regulator. --Used an extended LP adaptor with four outlets to clear the bottom of the regulator, and allow a hose to go over my left shoulder.  --Fine-tuned the LP seat holder by unscrewing it and testing it to ensure optimum position position at recommended interstage pressure. --Because of the better venturi, I placed a mouthpiece baffle in the mouthpiece to keep air from "blowing by" the mouthpiece and being exhausted. This effectively routed it into the mouthpiece. I used the baffle out of a Healthways SCUBA regulator's mouthpiece system, and glued it in place.* Note that since I put this post together, I have changed out that mouthpiece and am now using the VDH DSV Mouthpiece. The DSV Mouthpiece does the same thing mine did, directing air into the mouthpiece, without the hazard described below. John *Please note that on one dive, this became displaced, and cause momentary loss of breathing air when it backed up against the inhalation valve. I switched to my octopus, and continued the dive. I have since re-glued it in place, and continue to use it. Read more: vintagescuba.proboards.com/thread/493/re-engineering-modifying-vintage-scuba#ixzz5ezISTN16PS--2005 HOLY COW!!! THAT WAS FOURTEEN YEARS AGO!!! And...I have owned and dived that regulator for 44 years now! |
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Post by nikeajax on Feb 8, 2019 17:00:55 GMT -8
TD,I know how much John likes his, but that's a chunk of change for so much work you'd have in store for yourself. That Dacor mouthpiece may or may not be the good kind, I can't tell: but if it's not, it's going to make it breathe even worse. Just be patient, or see if Phil has one of his Goldies to sell ya: those things really rock. Or, you can get a Deluxe and put a Snorkeljet in it, which makes them nearly as good a breather as a Goldie...
As Phil always sez: Just sayin'...
JB
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Post by technidiver on Feb 8, 2019 18:45:55 GMT -8
I do understand the limitations of the regulator due to the design, but I wouldn't mind a challenge. This reg also has LP and HP ports built in. If I can snipe it that would be ok, as long as it's not a crazy price.
TD
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Post by Deleted on Feb 8, 2019 19:10:56 GMT -8
Searat,
sent ya a PM.
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All my other DH regs I use on a regular badis and breathe fantastic (with a few tweaks here and there - Cyclone 1st stages, HPR 2nds, etc...) I'm keeping the Trieste as part of my collection, at least for now. My three great breathing single stage regs are, in order, 1. HW Gold Label, 2. 1958 Mistral, and 3. 1961 Voit 50 Fathom chrome can. M
