Twin-hose open-circuit scuba regulators

[Nemrod]

I daknow James I get by pretty well will a BP, STA and wing with my DH. Course my tank bounces off the back of my knees!! LOL

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No doubt you make do but you might better make do with the plate on the left. That is the VDH plate and using it the can touches my back through the cutout. The Oxy UL plate work surprisingly well too. But, I see you in the drysuit and a really big tank so I know you have to work with what you gotta do! You out there way beyond me!



James

 

[rhwestfall]

Of the modern plates, the DSS plate had a much flatter bend, and is the one plate I use with my drysuit when I ice dive with my DH (see picture in post #12 upthread). I needed the 16# plate and the steel tank to keep weight off my waist (though I still needed just a little bit more)....

 

[rx7diver]

Here's mine: U.S. Divers DA Aquamaster (upgraded with 1st gen Phoenix), Scubapro Balanced Adjustable 2nd stage (for anyone needing air who doesn't know how to buddy breath a double-hose reg), VDH Classic Plate for DH reg, and everything on a OMS (Faber) LP 66 cylinder.

J-valve (used) should arrive from The Scuba Museum in a few days. My J-valve pull rod is standing by.

This is quite a nice, simple rig for shallow water solo diving.

rx7diver

 

[AfterDark]

No doubt you make do but you might better make do with the plate on the left. That is the VDH plate and using it the can touches my back through the cutout. The Oxy UL plate work surprisingly well too. But, I see you in the drysuit and a really big tank so I know you have to work with what you gotta do! You out there way beyond me!



James

Actually that's a 7mm wet suit. The tank however is a beast, a PST 96cuft steel 3000psi 48+lbs full 11lbs neg full and 6lbs negative empty. I have 2 of those that I've paired it up as IDs for wreck diving in NC. It is a long way up the ladder with two of those on your back.

You are spot on about the breathing with a DH. I compare it to breathing normally, without the subtle push I feel from a single hose when I inhale. I find my bottom time increases when I use my DH probably the decreased WOB.

 

[John C. Ratliff]

In the late 1980s I developed my own BCD for use with my diving, both single hose and double hose diving. Here are two videos I shot (5 years ago). They show both the setup I use, with its special harness, and the use of my double hose regulators.

I'm using my system on a single tank with a regular backpack, from the 1990s, and a Royal Aquamaster my brother gave to me.

This second video I actually shot a few months later when we had unprecidented weather and high temperatures, which affected the salmon in the river. I'm wearing my twin 45s, and diving my Trieste II regulator. This is a modified military harness, with my special 4-point harness hooked into hip connectors on the Para-Sea BCD.

I'm showing these because I really don't know how to explain my own breathing. I have been diving for a very long time (started in 1959, using a Healthways Scuba double hose regulator). But you can listen to my breathing, and make your own determinations.

John