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The big “D”

Discussion in 'Regulators' started by lexvil, Aug 2, 2020.

  1. lexvil

    lexvil ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    3,471
    3,258
    113
    I’m a recent convert to the “D” it was never on my radar because conventional regs are so easy to service and tune, I had a D400 but never really warmed up to it. When the D420 was announced and Rob Singler waxed so poetically about the superior design I thought I would try one, the 400 was gone but upon reflection it held a tune through years of sitting and no use. It wasn’t love at first dive but I don’t think SP had a clue at that time regarding the tune, I assume the new ones will do a great job, I will pick up another one of these days.

    I’ve been diving my 420 pretty much exclusively to see how well it holds tune and how long it can go without service, so far it’s been an amazing experience and I’ve actually tightened the tune (hotter) every other dive or so via the James79 tuner, during the dive I lighten the spring pressure a little each time, no dribble and super smooth delivery.

    I picked up a 350 from surite7 (sp) on a whim and it’s been on a neckless as a back up since detuning it slightly.

    On further whim I’ve picked up a few AIR 1’s which are truly amazing breathers, I’ve attached one to a pony for in ocean testing but so far in my pool really smooth nice air delivery, the standard all regulators should be judged by, these are not serviced and about 30 years old, no parts available so not really practical but a good long term look at how the design hold up, I have never had a conventional reg sit unused for so long and perform so well without service.

    The D420 is thicker due to its modernization to use a conventional exhaust valve, a good move on SP’s part I think.

    CA5246E2-1365-481B-B309-DD1C4BFF672E.jpeg D3E208B5-B65F-4882-8E33-2EE123D3B128.jpeg
     
  2. Scared Silly

    Scared Silly Regular of the Pub

    # of Dives: 500 - 999
    Location: on the path to perdition
    5,804
    1,409
    113
    When I see the D series for some reason I always think of Airedale and Irish Terriers, kind of the goatee thing.
     
    couv, rjack321 and lexvil like this.
  3. lexvil

    lexvil ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    3,471
    3,258
    113
    They are odd looking but odd for a purpose.
     
  4. lexvil

    lexvil ScubaBoard Sponsor ScubaBoard Sponsor

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    3,471
    3,258
    113
    They are Fully behind the revival
    image.jpg image.jpg
     
  5. Kupu

    Kupu Polliwog ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NC
    837
    361
    63
    Agree with the AIR1 being a smooth operator, I really like it and choose it over the Ds when wanting to dive a regulator of that type. (Not yet tried the 420)
    AIR1s are not hard to DIY service, especially if someone has worked on older D series. I have rebuilt a couple for use, plus sitting on 5 or 6 (and counting) for extra parts or eventual rebuild.
     
    lexvil and rhwestfall like this.
  6. rhwestfall

    rhwestfall Woof! ScubaBoard Sponsor

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    15,137
    16,861
    113
    My collection is a converted Pilot, a couple Air1, and d300, 350 and 400 seconds.... Maybe a 420 some day...
     
  7. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,871
    1,499
    113
    the d 400 is one of the best regs iv ever owned dove it down in bikini atoll under the Nagato at 200 plus
     
    buddhasummer and lexvil like this.
  8. buddhasummer

    buddhasummer Bat sh.t crazy ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Nanny State
    10,858
    3,950
    113
    @lexvil

    "I’ve been diving my 420 pretty much exclusively to see how well it holds tune and how long it can go without service, so far it’s been an amazing experience and I’ve actually tightened the tune (hotter) every other dive or so via the James79 tuner, during the dive I lighten the spring pressure a little each time, no dribble and super smooth delivery."

    Been doing and experiencing the same.

    A big thanks @James79
     
    lexvil likes this.
  9. abnfrog

    abnfrog Tech Instructor

    # of Dives: 2,500 - 4,999
    Location: great white north
    1,871
    1,499
    113
    whats a @James79 tool ? is it only for the 420?
     
  10. buddhasummer

    buddhasummer Bat sh.t crazy ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Nanny State
    10,858
    3,950
    113
    This:


    989441B7-2466-4008-9D18-21FED64C3F65.jpeg CF27766E-9F8F-40BB-8734-8B0EAA24BFBC.jpeg
     
    lexvil likes this.

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