Recent content by Davekan

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    NEW XTAR DRAGON VP4 Plus analyzing charger

    The ir feature on my unit is great. It give repeatable results on all my cells. I measured my half charged resting Vt6 cells at 13 milliohms. 30Q are 16 milliohms. Dave
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    4000 Watt short arc searchlight project

    Ametek Rotron makes the fans you want. If you get the dc versions, they are easy to control from dc/dc inverter. Look at Aximax, and Propimax from them. You lose pressure fast as you lower the speed so sizing in important. 70 cfm from a small 2" fan is better than 70 cfm from a 3" fan slowed...
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    Thrunite TN42 Feeler thread (CLOSED)

    Re: Thrunite TN42 Feeler thread Please pm me the price. Thanks Dave
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    Lemax LX70 Superpower HID Light

    4250^2/4 = 4.5m candela. 7000 lumans. Cool stuff, it sure does look like a very cool product. Congratulation, as I eagerly await some pictures fo this very rare light. Dave
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    Question on mah's in different type batteries

    The voltage is about 3 times higher in the lithium cell than Nimh cell. Dave
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    2000 watt short arc

    This is my new 3 axis stage. It is much smaller than the microscope one I was going to use.
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    The Nightsword project

    Cool pictures. I also like both of those lamps. The little 500 has a luminous area of only .8 mm x .7 mm That should make a very narrow beam. I still like the Xstage bulb because they are easy to get, and have very high intensity, and way more lumens. Just to let you know my 3000 watt power...
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    2000 watt short arc

    To be honest, the decision was easy. I do not want my hands near the running bulb. Also filtered air will be in that area, and I don't want any holes back there. I will post some pictures soon. It looks like a giant Maxa Beam. I think will call it Maxa Monster. It will have a huge umbilical...
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    2000 watt short arc

    Thanks for the input guys. I will be able to get the tip of the cathode very close to the focal point right from the start. It will be controlled by 3 small stepper motors on a 3 axis stage taken from a Zeiss microscope. All the travel limits have to have mechanical limits to prevent damage to...
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    2000 watt short arc

    Just setting the focus limits, Would 10 mm total be enough, and should I bias it a 60/40 toward the vertex. Note the reflector has 60 mm focal length. The 10 mm travel is for Z travel axis. Thanks Dave
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    2000 watt short arc

    I guess the best part, in this case is the cost per luman. 100000 lumans for $ 20. Dave
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    2000 watt short arc

    The gap is 3.6 mm. Here is the service card. [/URL][/IMG]
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    2000 watt short arc

    I fell out my chair when I saw this. I looks like a giant UHP bulb. Anyways it has S-90 burn position, and very small gap for this wattage. Here is the make of the bulb. Also called Osram xbo 2500W HY PER [/URL][/IMG]
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    2000 watt short arc

    Here is the new 2500 watt bulb. [/URL][/IMG]
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    2000 watt short arc

    Yes there has been some procrastination, but the project will move quickly now, as I have the supply now. I do have spider, and 3 axis focus ready. Also Aximax for cooling. Dave
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