Greg,
Thank you for that information; although I know most of it, the rest of the readership will enjoy the details. Concerning the DX Overpressure Breathing regulator, I have one and dive it regularly. I had it out about three weeks ago on a dive where I hurt my back (muscle bruise, it turns out, from my twin 45s and weight belt hitting on the same place during my exit). I'm healed now, but was hurting for about a week. But concerning the DX, it is a wonderful regulator when modified. I have changed the hoses to SCBA hoses, which are very long (about 28 inches). I also have a vinyl inner hose (the green rubber one had disintigrated). I have never had a "run-away" venturi from it. The venturi is comparable to single hose venturi's like in the Scubapro second stages (the older, metal ones). If USD had used a slot instead of three holes, they could have eliminated one of the complaints about misting water hitting the diver's mouth hard. It is also a very quiet regulator, because of the hose-within-a-hose concept. The cans have been chromed (although, unfortunately, I chromed over the name plate too). It has a longer Mistral yolk, and a gauge attachment (what is that thing-a-ma-jig called again--I must be getting old--that was my Dad's name for anything he forgot
). I have always thought that it could be resurrected by setting it up on a Mistral with a hose to the curved mouthpiece, a metal attachment in the middle of the mouthpiece and a slot like on the Scubapro single hose second stages. I just haven't had time to do it, and now with the balanced single stage you talked about, it probably won't happen unless I get bored.
The Voit 50 Fathom does have a second hole, in the top, which also feeds air into the cans. This also was used (different form) in the USD DX, DY and Mistral. I think it is left over from the DX, actually. But much of what I say is simply speculation, as I have no contact with the design engineers.
Greg, the gear now is better than new thanks to these kinds of discussions, and the input from people like you. Thanks again.
SeaRat
Thank you for that information; although I know most of it, the rest of the readership will enjoy the details. Concerning the DX Overpressure Breathing regulator, I have one and dive it regularly. I had it out about three weeks ago on a dive where I hurt my back (muscle bruise, it turns out, from my twin 45s and weight belt hitting on the same place during my exit). I'm healed now, but was hurting for about a week. But concerning the DX, it is a wonderful regulator when modified. I have changed the hoses to SCBA hoses, which are very long (about 28 inches). I also have a vinyl inner hose (the green rubber one had disintigrated). I have never had a "run-away" venturi from it. The venturi is comparable to single hose venturi's like in the Scubapro second stages (the older, metal ones). If USD had used a slot instead of three holes, they could have eliminated one of the complaints about misting water hitting the diver's mouth hard. It is also a very quiet regulator, because of the hose-within-a-hose concept. The cans have been chromed (although, unfortunately, I chromed over the name plate too). It has a longer Mistral yolk, and a gauge attachment (what is that thing-a-ma-jig called again--I must be getting old--that was my Dad's name for anything he forgot
). I have always thought that it could be resurrected by setting it up on a Mistral with a hose to the curved mouthpiece, a metal attachment in the middle of the mouthpiece and a slot like on the Scubapro single hose second stages. I just haven't had time to do it, and now with the balanced single stage you talked about, it probably won't happen unless I get bored. The Voit 50 Fathom does have a second hole, in the top, which also feeds air into the cans. This also was used (different form) in the USD DX, DY and Mistral. I think it is left over from the DX, actually. But much of what I say is simply speculation, as I have no contact with the design engineers.
Greg, the gear now is better than new thanks to these kinds of discussions, and the input from people like you. Thanks again.
SeaRat
