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Thread: 6D ROP = Bulb Flash

  1. #1
    Flashaholic* KuanR's Avatar
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    Default 6D ROP = Bulb Flash

    I know the ROP topic has been discussed lots and I did try to search for my specific problem.

    I did the ROP build with:

    - 6D Mag host
    - Pelican 3854H
    - FM bi-focal reflector
    - Borofloat lens
    - 6 Tenergy 10000mah D Cells

    I charged up the cells, loaded up the batteries fresh off the charger, and turned it on. I was pretty amazed at how bright it was, but the bulb burnt out in less than 1 minute of use.

    Did I make the mistake of not letting the cells "level off" its voltage before putting them into the light?

  2. #2
    Flashaholic chewy78's Avatar
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    Default Re: 6D ROP = Bulb Flash

    yes ,probably

  3. #3
    Flashaholic* Phaserburn's Avatar
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    Default

    Yes, exactly. The extra .1 volt each allowed too much current, and because bid Nimh d cells have such high capacity, they readily provided it. Happens to many while experimenting.
    The Phaser: A nice EDC with great throw; heat and runtime can be issues.

    Best Diffusion Film!

  4. #4
    Flashaholic* fivemega's Avatar
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    Default Re: 6D ROP = Bulb Flash

    Quote Originally Posted by KuanR View Post
    I charged up the cells, loaded up the batteries fresh off the charger, and turned it on. I was pretty amazed at how bright it was, but the bulb burnt out in less than 1 minute of use.
    That's normal.

    Pelican 3854 HO works hard on 6 cells and works too hard on hot off the charger D cells.

    Let the cells settle down and try again.

  5. #5
    Flashaholic* KuanR's Avatar
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    Default Re: 6D ROP = Bulb Flash

    Good to know I made a newbie mistake. Thanks everyone!

    What's a good amount of time to leave the cells sit after charging before using them?

  6. #6
    Flashaholic chewy78's Avatar
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    Default Re: 6D ROP = Bulb Flash

    a day

  7. #7

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    Another option is changing over to the 3853H. The extra volt of headroom will keep the blowouts in check.

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