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Mistral DH Reg (~1959) and modern tanks

Discussion in 'Vintage Equipment Diving' started by CT-Rich, Apr 21, 2020.

  1. Scuba Lawyer

    Scuba Lawyer Manta Ray

    # of Dives: 5,000 - ∞
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    For an AquaMaster with Hookah Port or equivilent (Voit Navy), yes. IP gauge goes on Hookah port with adapter. For older 2-stage DH regs (without Hookah Port) the IP guage screws directly into the second stage hole in the regulator body - see pic.

    P9DOlt.jpg
     
    JamesBon92007 likes this.
  2. James79

    James79 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Lower Alabama
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    If you don't have a hookah port adapter, I'm using a y-block with teflon tape on mine. Let's me run a BCD and safe second if needed. I don't believe VDH or Scuba Museum have any adapters in stock. Here is the adapter I'm using;
    Y Adapter 9/16
    I'm curious if the mass sell off of double hoses in the 60s-70s was mainly successful marketing of single hose... the more I play with my Cyclone/HPR DAAM, the more I think it may be my daily driver.... and I'm about to put a DAAM in the water with rubber diaphragm, resurfaced original seat, basically no upgrades, and see how that does.
    Respectfully,

    James
     
    JamesBon92007 likes this.
  3. JamesBon92007

    JamesBon92007 Great White

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    I have a swivel type Y adaptor on one of my old US Divers regs. I haven't gotten far enough yet to be thinking about BC hoses :wink:

    I'm sure you'll let us know how the DAAM works out :)

    I don't recall ever seeing anyone diving with a double-hose reg and I started in '69. There must have been some, I just don't remember seeing any and I'm sure I would have talked to them about their regulators. I wasn't in any way prejudiced, it was just my understanding that the single-hose was the personal preference of my instructor. After all, Mike Nelson used a double-hose so they had to be good!
     
    John C. Ratliff likes this.
  4. John C. Ratliff

    John C. Ratliff Instructor, Scuba

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    Fred Roberts, in his defining book, Basic Scuba, states that the VR-2 Mariner was made by AMF Voit from 1956 to 1959).
    SeaRat
     
  5. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
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    You can get a new duckbill here for $15:
    Two Hose Regulator Hoses Clamps Mouthpieces Duckbills Parts

    The IP gauge needs an adapter in order to be used, as it either plugs into the LP Hookah port on back (Herman sells an adapter for this for about $15), or interior where the LP seat goes (different adapter needed, see the U.S. Navy Diving Manual, 1970).

    SeaRat
     
    JamesBon92007 likes this.
  6. scrane

    scrane Manta Ray

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    I think there's a good analogy between why people like double hose regulators and why people like to restore and drive vintage cars and motorcycles.
    Obviously, if double hose regulators were a viable option there would be more than one manufacturer dribbling them out.
    As far as C clamps go: they are an abomination!
     
  7. JamesBon92007

    JamesBon92007 Great White

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    I connected a gauge to the hookah port and it reads 80 psi. That might explain the difficult breathing. I have carefully adjusted the IP according to the instructions twice. It reads the same on a tank with about 250 psi as it does on a tank with about 1200 psi. What did I do wrong?
     
  8. Scuba Lawyer

    Scuba Lawyer Manta Ray

    # of Dives: 5,000 - ∞
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    @JamesBon92007

    Let's do some tests. When you put an Allen wrench in the 1st stage bonnet nut and turn clockwise with the reg pressurized and the IP gauge attached, does the IP rise?
     
  9. JamesBon92007

    JamesBon92007 Great White

    # of Dives: 2,500 - 4,999
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    I was thinking about what you said about the clamps while I was reading the US Navy Aqua-Master Evaluation Report. They hated the little clips and even said that one man's hand was "badly cut" removing the clips. So far I don't care much for the little clips and as much as I like to keep things as original as possible, I may send VDH the $25 for the band clamp :wink:
     
    scrane and James79 like this.
  10. JamesBon92007

    JamesBon92007 Great White

    # of Dives: 2,500 - 4,999
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    Yes! The IP rises when I turn the nut clockwise. I got it up to about 130 psi when my pressure gauge connection started leaking (a nylon nut, a short length of rubber hose, and some hose clamps). I need to get a more stable gauge connection. It leaks slightly if I turn the nut clockwise anywhere past the 80 psi mark. Bad volcano valve, perhaps?
     
    Scuba Lawyer likes this.

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