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I’ll do you one better, Nemrod. I’ll dive my modified second generation Calypso. This regulator has the second generation Calypso second stage (the change in the first stage was to allow a standardized LP hose), with the original Calypso second stage on a long hose. The second generation...

Nemrod, we were issued these Calypso regulators while in the U.S. Air Force Pararescue in 1968. I have used them in many different dives during my service days. I never had the same impresssions you have of the smaller exhaust. I think if you look at the U.S. Navy Experimental Diving Unit’s...

Not really, as the US Divers Supreme silicone will prevent ice-up on the first stage, but the problem with the MR-12 II (and the III) is that the Venturi tube is exposed to the very cold water, and forms ice in the second stage, causing the leak. I noticed this decades ago in a lake dive on the...

HJW, Let me illustrate what a properly balanced double hose/mouthpiece looks like. In this 2016 video, I’m using my U.S. Divers Company DW Mistral single stage regulator, in high current. I had no problem holding the mouthpiece in my mouth, without any strain, because it was correctly...

This appears to not be an “oval” mask, but rather a very old-style circular mask. I think this is one of the first designs, from some of the really old-time divers who made their masks out of fire hoses. SeaRat

The only thing I don’t like about the MR12-II is that they tend to freeze up and free flow in very cold water. SeaRat

Why do you want weight rings for the double hose regulator? They are simply not needed. I have never used weight rings, and have been diving double hose regulators since 1959. The trick is to have the hose/mouthpiece system precisely oriented directly at the diver’s mouth when at rest...

HJW, Earlier you asked why you cannot use your high pressure gauge for the intermediate pressure setting. Well, it’s because the readings in the intermediate pressure range are not precise enough on the HP gauge. The gauge used for the intermediate pressure reading are on a dial that reads...

I think I have an inflator hose and inflator for a Dacor in my shed. I'll take a look, but if so, and I don't have a viable BCD for it, I'd send it to you at the cost of shipping. My thoughts are that if you can get that inflator, and test the BCD for leaks, you could dive it without...

Yes, that's why we test the regulator in order to ensure it is working correctly. Put it on a tank, and see what it does. I have a Dacor regulator (Extreme, I believe) which has never been apart, and is doing just fine right now. SeaRat

This may help some people. SeaRat

Okay, I'm going to say just take it out, put it on a tank, and see whether it leaks. I was successful in finding the Dacor Regs First Stage, which gives parts diagrams for all the Dacor regulators in that time period. It is on the CG-45.com website: dacor repair manual - volume two 9/93...

Now, I’m curious; are you not using the regulators because they haven’t been serviced yearly, or because they have a problem? I simply use my regulators until there is a problem, then service them myself. But I have a lot of vintage regulators, that have no servicing kits available. My...

Near as I can determine, the breast stroke frog kick and the diving “frog kick” are opposites. The breast stroke frog kick uses the back of the foot to push against the water, whereas the diving “frog kick” actually uses the top of the foot/fins for the push. That is the equivalent to what 50...

Well, I looked through the referenced link, and couldn’t find my post, so I must have missed that thread on CESA. Yes, I have done a CESA, when I was working for the Oregon Department of Fish and Wildlife on subtidal clam bed research. It was the second dive of the day, on my steel 2475 psi 80...

Here’s my Bali mask from Nemrod. I have continued to use it with tape around the mask where the plastic lens retainer used to be. I use it only in the pool, but because it is silicone, it will never deteriorate. I have found one on E-Bay that I may pick up. It is a Bali mask made of...

This Menorca flex snorkel (Type 1 & 2) is the one I had problems with in rivers in Oregon, and the current would bend the tube under the mouthpiece toward my chin, and cut off air flow. SeaRat

This is close to a flexible snorkel I had in the1960s, and I found out that snorkeling in fast-flowing rivers, the snorkel mouthpiece would be pushed across my chin and fold, cause a complete blockage of the snorkel’s airway. SeaRat

I have a silicone version of this Bali mask, but mine was made with a plastic rim, which broke. So I simply taped up with yellow tape, and continue to use it today. SeaRat

DRW, I think AMF Voit came out with an almost identical (possibly from Nemrod) version of this mask. SeaRat