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  1. tmassey

    Thermocouples clamped on gas tubing for reasonable-cost, continuous temperature monitoring of stage outlet temps?

    I wired up K type thermocouples on my compressor. I used not-adhesive thermal heat sink pad material to electrically insulate the thermocouple from the tubing: a single layer above and a single layer below. I then used a simple wire tie or two to hold the thermocouple tip up against the...
  2. tmassey

    New Halcyon Rebreather?

    Somebody get that writer a Grammerly subscription! It's like a caricature of a Fortune 500 press release. Press release as satire! You're writing to divers: just write normally. No one's going to buy your unit just because you wrote in passive voice third-person with as many $5 adverbs as...
  3. tmassey

    Jasper Reels by Ralph Hood

    I don’t want to derail your thread, but this seems like a good place ask: I’ve heard these referred to as Larry Green reels. You are referring to them as Jasper reels by Ralph Hood. Does anyone know the history of the name? ETA: I thought I would add *something* relevant to the thread…. I...
  4. tmassey

    Updated SCUBA tank specifications list -- in PDF and spreadsheet

    Yup, just a straight-up data entry error. Spreadsheet and PDF are updated and attached here. I'll ask the mods to update the first posts as well.
  5. tmassey

    Buddy wanted for Cave Diving in North Florida this weekend: Friday February 9 - Monday February 12, 2024

    I’ll be in the Ft. White / High Springs area and diving Feb 24-28. You can see my profile for more details, but I'm a TDI Full Cave diver with about 70 or so post-Full-class dives. I dive backmount exclusively. I'm good up to a single stage and deco, though I'm also just as good spending an...
  6. tmassey

    Checkout Dives in Oversized Drysuit

    Yup…. :) Hardest part of diving a drysuit. It’s the combination of the difficulty of feeling the change in buoyancy, and the fact that the actual dump will take a lot more technique and a bit more time to accomplish. So why make that worse by putting more air in that suit than necessary? The...
  7. tmassey

    Checkout Dives in Oversized Drysuit

    +1 My fear was a situation like what killed that woman during her training. So, to OP: make sure you test inflate your BC *and* drysuit before you go in the water…
  8. tmassey

    Review Key Largo Diving on Rainbow Reef

    I agree, and do the same thing on every charter I take, in advance before I get on the boat. I’ve had your experience before, and don’t want to repeat it. ETA: Often, you only have to do that a couple of times. If you’re not a train wreck, and are polite and reasonable, I find they usually...
  9. tmassey

    Question Banjo fittings for DH.

    There were a fair number of valves from the 70’s that had HP ports for pressure gauges. Here’s a pair of valves I had asked some questions about: they had gas gauges built into the valve itself...
  10. tmassey

    New Halcyon Rebreather?

    Yeah, an eCCR with a wireless controller is an interesting juxtaposition for an organization that is at best not supportive of a deco computer, let alone air-integrated computer… (I mean, I didn’t miss any SOP changes, right?). And @PEDiver ’s point is valid: Halcyon is not *actually* GUE…...
  11. tmassey

    My nastygram to SRI over the Teric Battery Issues

    I use eneloop batteries (low self-discharge NiCd rechargeable batteries) in my non-AI Perdix. Best of both worlds: long-enough life, lower waste and in a pinch I can shove anything that fits in the hole in it and keep diving. I would need a *compelling* feature to give that up, and as sexy as...
  12. tmassey

    New Halcyon Rebreather?

    I hate FB/IG so I’ll Dear Lazyweb here: MCCR or ECCR? any idea of price? I find the GUE move to rebreathers odd. Which principles are they willing to alter, and why? It’s been a bit of a blur the last couple of years: I’m waiting for things to settle… I’m intrigued to see what a Halcyon...
  13. tmassey

    Review Key Largo Diving on Rainbow Reef

    I think you’ve had a similar experience with Rainbow Reef as I have had. Their dive process is as Disney-ified as their website. That is *not* a knock on them. Disney is one of the most popular attractions on earth. It’s not a bad model to emulate. But if you’re *not* a Disney person (for...
  14. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Conclusions As mentioned, this review comes from an unusual perspective: a technical diver looking for better backup lights. My thoughts are mainly focused on this use, but I've tried to detail how the light might work for a recreational or new-to-tech diver so you can apply this to your own...
  15. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Runtime - Part 2 Here is the fish-killer running for 115 minutes compared to the OrcaTorch with a fresh battery on High, to compare to our starting brightness: 115 minutes, OrcaTorch with fresh battery on High So, it turns out the alkaline battery light is down a good amount too. In fact...
  16. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Runtime Brightness is certainly important. Runtime is pretty important too, though. What can we expect from this light? The manual says 125 minutes on high. I'm reluctant to simply trust that number: I need to be able to count on what this light will deliver. So, I turned the light on...
  17. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Using the light underwater ETA: I'm pretty sure the batteries in my fish-killers were lower than I thought they were. I did not put fresh batteries in them for this trip. I absolutely should have done that. Seeing the results from the runtime testing made me realize that the results here...
  18. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Light prep and initial impressions The first thing I did was charge the battery overnight. That gave me plenty of time to get familiar with the manual and prep the light. The manual was noticeably above average: it still felt translated, but mainly because the language was more formal than a...
  19. tmassey

    Review OrcaTorch D550 1000 Lumen Handheld Dive Light Review

    Purchase, unboxing and accessories I ordered the light on Amazon. Because of the review process, there were a couple of extra non-Amazon hoops to jump through that a normal buyer would not have. I had issues with that part and OrcaTorch jumped in quickly and effectively and helped me to...
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