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Need HP hose to mount Perdix AI transmitter. Recommendations?

Discussion in 'Shearwater Research' started by nwflyboy, Jan 14, 2018.

  1. Saniflush

    Saniflush ScubaBoard Supporter ScubaBoard Supporter

    I think he meant he is handing gear up post dive.
    RayfromTX likes this.
  2. Charred

    Charred Barracuda

    # of Dives: 100 - 199
    Location: Lehigh Valley
    I wanted to share my experience with a 6" rubber hose dongle. I attached a couple photos from my last trip. Please note I have an Atomic reg and so my first stage is on a 45 degree angle. On the right side, the HP port points up 45 degree and on the left it points down 45 degrees.

    The one with my family has the transmitter coming off to my right. It is actually attached to the 22in hose of my necklaced backup via a piece of bicycle tube. I was running a SPG of my left port so that is why it is on the right port. You can see how far it sticks out. It actually sicks out further than my 22in hose. I noticed this early in my trip reviewing photos (this photo actually) and I didn't like it sticking out since we were in Cozumel and doing lots of swim throughs. Since I wasn't dropping signal even across my body I removed the SPG and moved the transmitter to the left port.

    The next picture with just me in the goofy pose (I just found a spoon in ~100 ft of water and was channeling my inner pirate....) has the transmitter of my right. It tucks in a little better since it is angled "down". It was not attached to anything because my inflator hose is just the right length and pulled on it awkwardly if I attached it to that hose.. Right side was better because of the angle but still I did not like that.

    So I bought the 4" flex hose from DGX mentioned in this thread and I'll try that next trip. I'll probably go back to running it off the right port so I can use the SPG. The 4 inch hose is stiff with no flex since it is so short.

    So unless you are going to tuck it in somewhere, I think a 6" is too long.

    PS - love my DDS rig with the 17lb wing. You can barely even tell I am wearing a BCD....

    IMG-0096.JPG IMG-0097.JPG
  3. Scared Silly

    Scared Silly Regular of the Pub

    # of Dives: 500 - 999
    Location: on the path to perdition
    Charred, with the 6" hose mount the transmitter on the right port and then just tuck it back 180 degrees under the reg. You should find that it will rest between the cylinder and wing and stay put.
  4. rongoodman

    rongoodman ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Albany, NY
    I just got back from a trip to Cocos and the AI worked perfectly! I'm spoiled already. The 4" hose from DGX was fine, but after watching the DMs move the gear around in the pangas for a week I'm beginning to think it's a solution to a non-existent problem.
  5. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: U.S. East Coast
    I pretty much agree, but it only takes one bozo, once....
    I've got mine on a 4-inch hose right now, but am not happy with it sticking out.
  6. BFRedrocks

    BFRedrocks ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Phoenix, AZ
    I brought my reg with a transmitter attached directly to the first stage to Fiji a few years ago, and the dive shop cleaned our gear after each day's diving. After the third day, my transmitter stopped working (turns out it had cracked all the way through after a DM mistakenly slammed it against a rock). In any case, ever since that time, I carry my reg on/off the boat, and take it with me after diving to avoid any potential a DM would break it again. I like the idea of the short hose, but feel it's not a problem given how I have my reg under my control at all times. Only once have I been asked by the DMs to hand up my gear to them on the boat after a dive, and once I mentioned the transmitter to them, they made sure not to grab it as a handle. I may consider the 4-inch hose as an option to switch to though (bring it with me) if a future dive trip is setup where your rig is passed up to the boat after the dive.
    Saniflush likes this.
  7. hammet

    hammet Manta Ray

    # of Dives: 200 - 499
    Location: United States
    why not just paint the thing neon orange with letters 'NO GRAB'?
  8. Scared Silly

    Scared Silly Regular of the Pub

    # of Dives: 500 - 999
    Location: on the path to perdition
  9. guyharrisonphoto

    guyharrisonphoto ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Florida, USA
    The transmitter signal can be blocked by your body. They are strictly "line of sight" with very weak output, and even your flesh between them and the computer can result in occasional signal drops. I would not use a longer hose and "tuck it in" behind the wing (and by definition close to your body) because you are impairing the reception of the signal by the computer. I put mine on a 4 inch hose. Very stiff especially when pressurized. No bouncing or flopping around, even when not pressurized. I wear my computer on my left wrist and put the transmitter on the left side of my first stage. Having it sticking out can actually improve reception by getting it away from your body a little. It works great. When diving from RIBS or skiffs,, it is not uncommon to take gear off in the water. If the DM grabs the first stage, the hose prevents any potential damage to the transmitter, which will just flex and not become a "handle" for hauling your gear in to the boat. If I was going to use a longer hose, the only reason would be to run it over my shoulder and then strap it to the inflator hose or clip it to the shoulder D ring which would assure perfect reception because the transmitter is not blocked by your body. I have not felt the need to do this, and it is extra hassle that is not really needed.
  10. mstevens

    mstevens Toadfish. Splendid is implied but not guaranteed. ScubaBoard Supporter

    I understand the concern about potentially breaking an expensive transmitter and the chance that might scrub a dive if you don't have an HP port plug handy. I just don't think it's likely enough to justify worrying about.

    My wife, son, and I each have between 250 and 300 dives on transmitters mounted directly to first stages. All of those are Cozumel boat dives. I used to cringe about the possibility of a deckhand or DM grabbing a rig by the transmitter, but they all know not to do that. I inspect the transmitters frequently for signs of damage, but they really do appear to be pretty robust.

    Although a short HP hose isn't very likely to cause issues, it does add one connection that's an additional potential failure point without, in my opinion, contributing any real benefit.

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