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Small review: Great and inapt.

  • DrJones Saturday, October 29, 2011 7:22 AM Reply
    Nice design, great stainless steel finish, can tailstand.
    The deep OP reflector gives a nice, smooth beam with a tight spill cone.
    Build quality is mainly nice; the electrical components seem quite good in terms of low resistance....

    .... actually too good for direct driving the XM-L. The driver is a simple direct drive circuit with PWM mode control; "low" is 45% duty cycle at 175Hz, strobe is 33% @ 4.3Hz. "low" pulls >1.8A, high was >4A. The light quickly gets hot on "low" (yielding about 400 and some lumen), and very hot within seconds on high.
    High mode starts very bright, but drops within fractions of a second to about the "low" level with a more blueish tint, which means the LED gets much too hot (thermal sag and a bit of 'angry blue').

    To run the light I first used sku.5790, but the protection circuit kicked in on high and strobe. Then I used sku.20392, giving too much current.

    I couldn't use that light as is. Exchanged the driver to an 8*AMC7135 driver (which I programmed myself) and now have a wonderful light; it instantly became my favourite.

    Inapt in stock version, great with a driver mod.

    Note however that other users had better experience with this light.
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  • holokostya Monday, February 6, 2012 12:56 AM Reply
    DrJones, explain how you did the driver exchange?
    Posts(13) | Reviews | Tip post

  • DrJones Saturday, February 11, 2012 3:20 AM Reply
    Screw off the head.
    Screw out the pill (e.g. using sturdy tweezers).
    Desolder the board (if it's soldered on the outside, I don't remember) or just break it out (somehow make a hole into it and pull it out).
    Desolder the two wires from the driver (which lead to the LED).
    Solder those two wires to the new driver.
    Put the driver in the place of the old one (if slightly too big, sand it down a bit).
    Solder it's edge to the pill's brass ring at 2 points.
    Screw in the pill.
    Posts(1593) | Reviews | Tip post

  • Grnhrnt Monday, March 26, 2012 4:18 PM Reply
    Where did you get the replacement driver and how much does it cost? This information will help me a lot because I need to do this to several of my flashlights.
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  • DrJones Thursday, March 29, 2012 7:53 AM Reply
    Well, unfortunately DX doesn't (yet?) have that one, it's discussed here
    Posts(1593) | Reviews | Tip post

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