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  1. tmassey

    Hopping my way to full cave...

    Wow, thanks @rddvet: I’ve never seen such a comprehensive description of how to get through that area. That’s awesome. My goal for the next time I’m able to get into a cave is to go as absolutely slow as I can and try to figure out how to be as smooth as possible. I love the idea of @Manatee...
  2. tmassey

    The Great Helium Hunt of 2021

    Apartment or not, you realize you’re 1/2 a step away from a compressor – or at least a booster. @tbone1004 has one that fits in a pelican case. :-)
  3. tmassey

    How to turn off an Analox O2EII?

    The sensor life is determined by two things: how much oxygen it’s exposed to (which uses up the chemicals in the sensor), and the chemicals within the sensor itself drying out. Turning it on or off won’t change anything. Putting it in a sealed, low-oxygen environment can help (that’s why they...
  4. tmassey

    How long can a nitrox tank be stored fully filled?

    Bad air or simply typing on mobile. Who can tell the difference?
  5. tmassey

    HP130 for lobster diving and spear fishing

    Just a follow up with this. I did three dive trips last weekend, each with a different set of doubles. I used double HP130’s, double HP120’s , and double LP85’s. If you’re not familiar with them, HP120s are about the longest tanks out there, HP 130s are roughly the same length as AL80’s, and...
  6. tmassey

    How long can a nitrox tank be stored fully filled?

    Years and years and years... Rebreather divers will have bail out battles that may have the same fill for multiple years. I’ve heard stories of divers who haven’t used them for the entire length of the Hydro! :) Theoretically, it’s not impossible that the tanks could literally rust/oxidize...
  7. tmassey

    Somehow my tanks multiplied on me.

    My tank collection used to be pure: all high pressure steels. Living in the Midwest, low pressure steels are a liability. So much ignorance means that it’s difficult to get the fill that they are rated for, let alone the heresy! of one psi beyond. It’s not the Bible belt, but you can see it...
  8. tmassey

    Somehow my tanks multiplied on me.

    I think I have 21 tanks. Of course, when I started writing this, my count only came up to 17. So who knows if I’ve actually got them all. Four sets of usable doubles (two “large”, two “medium”), One set of doubles to store helium (*very* clearly marked with multiple labels, and the valve knobs...
  9. tmassey

    HP130 for lobster diving and spear fishing

    You rang? Updated SCUBA tank specifications list -- in PDF and spreadsheet Comparing apples to apples with PST tanks, HP130s are nearly 6 pounds heavier, and 1.3 L larger water volume than HP120’s. Diving singles, I would allow trim and body geometry to determine whether I used 120 or 130s...
  10. tmassey

    tank valve compatibility around the world

    A yoke valve is mostly solid brass, with some grooves machined into it and a small hole that leads into the tank. A DIN valve, on the other hand, ends up as a thin cylinder of brass with an internally threaded hole that you thread the regulator into. There really isn’t a lot of brass in that...
  11. tmassey

    Are zipties used for diving gear just regular zip ties?

    I second this. Last time I bought them was probably a few years ago, so I went and checked out the price. Yow! $32 for 100 of them. I think I paid eight dollars last time I bought them. Having said that, they’re the right tool for the job: The stainless tab makes them much stronger and more...
  12. tmassey

    Easiest U-boat to dive in the Eastern coast?

    At the risk of hijacking the thread... Which is the best for penetration? I’ve seen a couple of YouTube videos of U-869. Are there other candidates for significant penetration?
  13. tmassey

    Regulator Service Technician Training - Unrestricted

    Finally completed my review. It's L O N G... I put it in its own thread here: Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler As I mention in the review, I've read *nothing* of anyone else's feedback -- which was intentional. I now get to see what...
  14. tmassey

    Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler

    If you think that this class is for you, then here are some additional thoughts on what I used and what worked for me. Take them for what they're worth: just one guy's opinion. Tools: You don't need *nearly* as many of them as you think (or @rsingler outlines). Especially if you only want...
  15. tmassey

    Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler

    Day 3: Self-directed study. You might say that this was a two-day class. For me, it was clearly a three-day class. First of all, I had to run out and grab a replacement IP gauge and re-tune everything to/with the proper IP. Like I mentioned, I was able to finish up that second stage that...
  16. tmassey

    Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler

    So, now we're up to the time to start the class. Buckle up, because it's going to be non-stop and fast paced. (Well, that is, after we start with a few hours discussing regulator theory.) The breaks are few and far between -- and instruction rarely stops even *during* the breaks. Make sure...
  17. tmassey

    Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler

    The actual Zoom experience is an area where @rsingler really planned and executed this process well. He had multiple cameras available with different angles and magnification as well as a variety of supplemental lighting options. There was really *never* a time where we weren't able to see...
  18. tmassey

    Review of Class #1 of Regulator Service Technician Training - Unrestricted by RSingler

    If you've ever read a review by me, you know it will be many things -- including LONG... Have your beverage handy! This is in review of @rsingler's recent Regulator Service Technician Training class...
  19. tmassey

    APEKS Reg - Which one would you choose? (Poll)

    Long hose deployment in a restriction requires a nearly 180° bend out of the first stage to the out of air diver in front. If that out of air diver pulls too hard, they can shut their own gas off by pinching the hose. You do you. Dive and let dive. And I’m not trying to change your or anyone...
  20. tmassey

    APEKS Reg - Which one would you choose? (Poll)

    This is a really good point. My logic is colored by technical diving with back mount doubles, where the fifth port and turret add tremendous value. If you’re going to stay with a single tank forever, the FSR is probably a slightly better configuration, and you lose very little going with the...
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