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Thread: KD's 773U Mag G4 bulb.

  1. #1
    Flashaholic* Fusion_m8's Avatar
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    Default KD's 773U Mag G4 bulb.

    I'm a noob trying out my first incand mag mod. So blowing up things is pretty new to me at this stage.

    What I need to know is: could KD's 773 bulb be run on six 2500mahs Ni-Mh batteries?

    The specs say two Li-Ons or six AAs, doesn't say what type of AAs...

    I don't have any NTCs or soft-start devices... is that bad??

    Any advice is much appreciated.
    Last edited by Fusion_m8; 04-14-2008 at 08:05 PM.
    Before we can become old and wise, first we have to be young and foolish.
    When I die, I want to be like grandpa, peaceful and asleep. Unlike his passengers, screaming and yelling...



  2. #2
    Flashaholic* FILIPPO's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    assuming that it's rated at 8.3V I can say that it can runs on 2 li-ion (7,4 nominal voltage) and 6 X 1,2V nimh for a total voltage of 7,2 (nominal) and 8,4 "hot of the charger".

    with this bulb you don't need a NTC...

  3. #3
    Retired Administrator Norm's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    It will be interesting to see this bulb Gavin if the specs are right I might give it a try after I've seen yours. What host do you have in mind? I'd be running on two C Li-ions though.
    Norm

  4. #4
    Flashaholic* Fusion_m8's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    The host will be a Mag 2D with 6AAs in it... 2500mah VARTAs I bought from Bunnings.

    These VARTAs appear really well made, I purchased 2 packs of 4AAs and I measured each cell with a DMM and all were within 0.1v of each other. I cycled them thorugh my DX Soshine charger and all of them came off the charger fully charged within 0.1v of each other.

    I guess the truth is in the testing when my stuff arrives from Kai.

    I just hope the 3AA-1D adapters I purchased off Litemania will be up to the task. I heard that if the resistance is too high, the 3AA adapters can warp and melt!

    I purchased 5 bulbs Norm, you can have a couple if I don't blow all of them up trying to mod my light!



    Quote Originally Posted by Norm View Post
    It will be interesting to see this bulb Gavin if the specs are right I might give it a try after I've seen yours. What host do you have in mind? I'd be running on two C Li-ions though.
    Norm
    Before we can become old and wise, first we have to be young and foolish.
    When I die, I want to be like grandpa, peaceful and asleep. Unlike his passengers, screaming and yelling...



  5. #5
    Flashaholic* Fusion_m8's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    phew... thanks for letting me know that... I was just looking for a simple mod 'drop-in' for my 2D mag... I didn't really want to get messed up with soldering and resistors etc.... thank goodness its just a simple mod.

    Quote Originally Posted by FILIPPO View Post
    assuming that it's rated at 8.3V I can say that it can runs on 2 li-ion (7,4 nominal voltage) and 6 X 1,2V nimh for a total voltage of 7,2 (nominal) and 8,4 "hot of the charger".

    with this bulb you don't need a NTC...
    Last edited by Fusion_m8; 04-14-2008 at 06:39 PM.
    Before we can become old and wise, first we have to be young and foolish.
    When I die, I want to be like grandpa, peaceful and asleep. Unlike his passengers, screaming and yelling...



  6. #6
    Flashaholic* rizky_p's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    I had KD 773 bulbs inside Mag 2D running on 6 Sanyo 2700 NiMh.
    If you can get Osram 64250 or 64275 locally better get the osrams, i prefer Osram 64250 than KD's 773 bulbs. The osram runs brighter and whiter IMHO.
    KD's 773 has a round-er hotspot than normal G4 halogen bulb such as osrams..

    7 Cells kills the KD 773 bulbs on mine but you can run it on 7 if the battery is drained enough.

    Quote Originally Posted by Fusion_m8 View Post
    I'm a noob trying out my first incand mag mod. So blowing up things is pretty new to me at this stage.

    What I need to know is: could KD's 773 bulb be run on six 2500mahs Ni-Mh batteries?

    The specs say two Li-Ons or six AAs, doesn't say what type of AAs...

    I don't have any NTCs or soft-start devices... is that bad??

    Any advice is much appreciated.
    M@g 623->633, M@g 250, M@g 5761, Penta Cree Q2 M@g (Maxflex), 35w HID Spotlight mod,
    M@g Aspherical Q5, M@g P7, Triple M@g P7(DW)

  7. #7
    Retired Administrator Norm's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    Quote Originally Posted by Fusion_m8 View Post
    I purchased 5 bulbs Norm, you can have a couple if I don't blow all of them up trying to mod my light!
    Good one Gavin I'll trade you for some P60 style bulbs I have a choice of 3.6 or 7.2 Volts.
    Norm

  8. #8
    Flashaholic* Fusion_m8's Avatar
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    Default Re: KD's 773U Mag G4 bulb.

    Norm:

    Could you PM me your address? Got the bulbs this morning, maybe its just my setup but there's no way the KDU773 bulb is putting out more than 200 torch lumens! Its way brighter than the original 2D Mag bulb, but its no where near the eye scorcher as advertised. But like I said, maybe my setup is wrong. So maybe you'll have better luck than me!
    Before we can become old and wise, first we have to be young and foolish.
    When I die, I want to be like grandpa, peaceful and asleep. Unlike his passengers, screaming and yelling...



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