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Richard Pyle writes: > > On Fri, 29 Jul 1994, David Doolette wrote: > > Could anyone who uses the SCUBAPRO D-400 second stage or the previous model > > (whatever that was) give me any opinions on it. > : > From my experience, it > breathes easier than the G-250, both on inhale & exhale, at all depths I've > tried it (down to 400+fsw). I like it MUCH better than my Odins (quite I have a pair of Odins and I agree. They're awful at anything above 100fsw, and not as good as my D350 down to 200fsw. Even after I tuned the Odins right to the edge, and broke in the (huge) diaphragm. > regulators I've ever owned). The D-350 does seem a little finicky if ignored > in a closet for too long, but generally I've found it to be reliable. I had a bit of trouble with mine after a poor service job in Boston, and had to have it serviced again 1 month later -- unfortunately in San Francisco, so I had to pay again. :( >> diver, I am interested in how they perform when diving in a head down >> attitude and how breathing resistance changes from moving from head up to >> head down. Do you need to tune them down for head down diving? I would also >> like to know how easy they are to keep in tune (cost of parts, how often >> they need servicing). > > I'm not a cave diver, and I've never noticed any difference in performance > depending on relative position - I'll pay more attention next time I use I've never noticed any difference in breathing performance, save that mine is a little wet when nearly vertical (open water diving). > my D-350 (next week). There's not a whole lot to adjust inside - VERY > different mechanism from the balanced adjustable series. It has a > Dive/Predive switch which seems to reduce free-flow problems. Parts cost > about the same. Parts aren't an issue, but Rich, there are actually two more adjustments you as a user can get at without tools, which make a difference. First, you can adjust the venturi effect by tilting the vane in the mouthpiece barrel. Second, there is a ring surrounding the air outlet which can be turned to obstruct the airflow towards your mouth. It's a little hard to explain, but look into your reg down the mouthpiece barrel. You'll see a small spring in a vertical orientation, and a horizontal poppet assembly. There is a sliding ring parallel to the circular cap, about a 240 degree semicircle, which can be rotated to obstruct or not obstruct airflow. These, combined with the nearly jam-proof dive/pre-dive slide, make for a very nice, light regulator. It's my favorite of my Odin, SE2, Conshelf 21, and Dacor regulators. Cheers, David Story NAUI AI Z9588, PADI DM 43922, EMT story@be*.wp*.sg*.co* Take only pictures, leave only bubbles.
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