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    NiteCore Extreme Review - RUNTIMES, BEAMSHOTS, COMPARISONS, etc.

    Let me add my experiences too... * I bought mine a year ago and back then it came in a nice padded box with nice foam, 2 switches, allen wrench, etc... really nice. The SR3 I bought about a month ago comes in a box too but the foam is really junky quality so unlike the Extreme box was...
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    Best way to clean a reflector?

    After a blown bulb I used water running over the reflector for a few minutes and that got rid of most of the loose stuff. Then I used cotton to dry it and scratched it up :ohgeez: I agree with the best advise being just don't clean it / save up for a new one. The surface is so fragile that...
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    The Dangers of Working with a High Voltage Supply

    Thanks for clearing it up, it makes a lot of sense now (still have to finish reading that other thread but that's scarry stuff). I'm glad DC burns... I'll take a burn any day over my heart stopping... You also raise an interesting point with the 9 volt story... I remember doing that when I...
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    The Dangers of Working with a High Voltage Supply

    Really, not to discredit what you said because it makes a lot of sense, however, I thought it was the other way around. I'm fairly sure the pulses of AC will lock muscles above around 60ma. Here is an excerpt from another site which kinda confirms this: "The first electric chair execution...
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    The Dangers of Working with a High Voltage Supply

    Perhaps 1000v then? :laughing: Anyways that makes sense and explains what happened better. I also learned that spilled coffee can cause third degree burns in 2-7 seconds so perhaps I should consider myself lucky :-) The blister is only a callus now and should be gone by next week, however...
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    The Dangers of Working with a High Voltage Supply

    Now that's an accident that will stay with you a while :grin2: I guess the rule, "always remember your rubbers" work for electricity too although a condom probably isn't rated to too high a voltage... I wonder if a static shock could get through :faint:
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    The Dangers of Working with a High Voltage Supply

    Still thinking about the stupidity and decided to figure out what actually went through me. The supply was charged to 534 volts at the time I made contact. Current the supply provides I "believe" is irrelevant because by I = V/ R the body will only allow a certain amount of current to pass...
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    The Dangers of Working with a High Voltage Supply

    Nope, only a pot to control voltage which is why, especially in lui of what happened I'm not even considering it. In order to charge lithium cells I would need CC for bulk and then CV with a thermocouple and be present as the minimum... even then being present with a charger built for Li-ions...
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    The Dangers of Working with a High Voltage Supply

    Thanks for closing the original question, it is very appreciated even though I won't be using the supply anymore :-) Wow, I thought I could trust the gloves although what you state makes perfect sense, one crack in the rubber and you have a problem. Perhaps the leather exterior with rubber...
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    The Dangers of Working with a High Voltage Supply

    Way too true... my setup was the result of rushed work and ignorance into how dangerous the setup was... no excuse there. In an ideal setup (and what I will do from now on if I need to work with these voltages again (aka when I need to)) *Operate the supply with thermocouple attached to...
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    The Dangers of Working with a High Voltage Supply

    :) The Pyramid supply would be for the SLA's in place of the current charger. For Li-ions I will stick with my WF-139 or nano :-) Good thing I learned my lesson with a relatively small cell that didn't explode... had it been one of my 18650's the result would have been much worse I'm sure...
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    The Dangers of Working with a High Voltage Supply

    I actually don't see any main diode although there are ones preventing against reverse polarity and ones protecting most of the vital integrated circuit components. Kinda odd that it isn't present on this either although the age of the supply could be a factor. In fact I don't see over-current...
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    The Dangers of Working with a High Voltage Supply

    Fairly certain there is a backflow-prevention diode inline with the high voltage output... going to check the schematic now
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    The Dangers of Working with a High Voltage Supply

    I won't disagree with anything you said as your 100% right. I was using the supply to charge large SLA batteries and that's where I should have ended it. Those batteries (18aH) can absorb overcharge much better (at 300ma), not to mention have a voltage curve which rises much slower. I would...
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    The Dangers of Working with a High Voltage Supply

    I don't know if the :crackup:meant "just kidding" or not, however, this is the first time in 5 years I've injured myself to any extent regarding the use of high voltages and it was a lapse in concentration which did it along with trying to fit too much into one day. My point was that it doesn't...
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    The Dangers of Working with a High Voltage Supply

    Just an update after a night's worth of sleep. While what I did was undoubtedly stupid, what I did before wasn't. The sad part is that if I hadn't freaked about the voltage (being so tired) and only flipped one switch then there would have been no problem. Now for the dummy proof (probably...
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    The Dangers of Working with a High Voltage Supply

    Re: Constant Voltage vs Constant Current vs Constant Power Remember what I was saying about the dangers of high voltage? Even if you are usually careful? I'm typing this with one hand because my other one has two second degree burns. I'm quite ok, however, don't ever assume voltage plays...
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    The Dangers of Working with a High Voltage Supply

    Re: Constant Voltage vs Constant Current vs Constant Power ask and you shall receive :-) Here is a link to the schematic for my model. If you need to know anything else just ask, I'm sure I can hunt it down http://www.eisenhower.org/eric/isco/493sch.pdf
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    The Dangers of Working with a High Voltage Supply

    Re: Constant Voltage vs Constant Current vs Constant Power Yep, The unit has two modes, 500v/400ma/200watts and 1000v/200ma/200watts. The wire I use is rated for 2000 volts and even then I keep it on the 500volt max setting figuring every little bit of safety helps :-) So the question remains...
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