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109 Second Stage on MK10 or MK5?

Discussion in 'Vintage Equipment Diving' started by ozziworld, May 28, 2012.

  1. ozziworld

    ozziworld Manta Ray

    # of Dives: I'm a Fish!
    Location: Philippines
    746
    210
    43
    I have just acquired a 109 Adjustable/MK5 set with 2 second stages and wanted to get some opinions.

    I also have a G250Graphite/MK10 set that I have been using for the last 20 years. I was considering pairing one of the 109s with the MK10 so as to end up with one set 109/MK10 and one set 109/MK5 and just keep the G250 Graphite for trips where a little weight advantage might be worth the swap.

    I basically want to use the brass 109s and was thinking it might perform better with the MK10. If it performs just as well with the MK5, I guess I can just leave the G250 Graphite on the MK10.

    [​IMG]

    You opinions would be highly appreciated.
     
  2. rhwestfall

    rhwestfall Orca

    # of Dives: 100 - 199
    Location: "La Grande Ile"
    5,759
    3,093
    113
    Been diving MK-10/109 (or 156) all my certified years. Outstanding combination.
     
  3. Zung

    Zung Loggerhead Turtle

    # of Dives: 500 - 999
    Location: Geneva, Switzerland
    1,615
    263
    83
    Tough.

    Basically, I've the same problem: deciding between the 109/156BA and the G250. While the G250 breathes a bit better thanks to the Venturi assistance, the 109/156 has a much better "cool" factor. The 1st stages don't do much to the perceived performance, as long as they're balanced and properly maintained.

    So my advise is: keep both your G250/MK10 and your 109/MK5 as is, and alternate between dives or between trips until you make up your mind. I've been doing this for the last few years and can't say which one I prefer. Just make sure to tune them both to the same cracking pressure, usually around 2.5 cm or 1 inch of water, so you compare apple to apple.

    Note that you don't really have to decide, since you have both: just dive with whatever you fancy at the moment.
     
  4. rhwestfall

    rhwestfall Orca

    # of Dives: 100 - 199
    Location: "La Grande Ile"
    5,759
    3,093
    113
    its all about the "Cool Factor"
     
  5. Fishpie

    Fishpie Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Fort Lauderdale
    1,647
    226
    63
    Have to agree with the others.
    Since the perception of performance has all to do with the 2nd stage and there's minimal difference between the 5 and 10 I very much doubt you'll be able to tell any difference between having the 109's on the 5 or the 10.
     
  6. AfterDark

    AfterDark Solo Diver

    7,094
    2,635
    113
    When I dive my ID's one reg in a Mk10/R109 the other is a Mk5/109. There is no difference I can perceive. Nice score!
     
    Last edited: May 28, 2012
  7. elan

    elan DIR Practitioner

    # of Dives: 200 - 499
    Location: Toronto, Ontario, Canada
    3,316
    376
    0
    Is it really a vintage question :)?
     
  8. Zung

    Zung Loggerhead Turtle

    # of Dives: 500 - 999
    Location: Geneva, Switzerland
    1,615
    263
    83
    Good point. I had to check, and, to my great surprise, the definition is: "Pre-1980 "Vintage" SCUBA Gear".
    So even the G250 is near-vintage.
    Time flies... :depressed:
     
  9. AfterDark

    AfterDark Solo Diver

    7,094
    2,635
    113
    These reg are timeless. They are the standard.
     
  10. elan

    elan DIR Practitioner

    # of Dives: 200 - 499
    Location: Toronto, Ontario, Canada
    3,316
    376
    0
    Shhhh... No need to tell everyone;) do not increase the demand...
     

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