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Thread: Playing a little with an SST-50 ...

  1. #1
    *Flashaholic* wquiles's Avatar
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    Default Playing a little with an SST-50 ...

    Not a full build, but I will share a few pics








    This is with the reflector I got from Jo:





    Here is with a deep reflector for MC-E/P7:





    And here with a small reflector for the MC-E:



    Here I am running it at 4 Amps:



    Here I am running it at 5 Amps:



    Will
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  2. #2

    Default Re: Playing a little with an SST-50 ...

    Wow, it took 4.6 volts to get 5 amps from an SST-50! I thought they were supposed to have a low Vf. Page 8 of the Luminus pdf on the SST-50 says it only takes 3.6 volts to get 5 amps. What's up with that?


  3. #3

    Default Re: Playing a little with an SST-50 ...

    prolly a lower or an unknown bin, the data-sheet will be for the highest binned
    Enlightened from birth

  4. #4
    *Flashaholic* wquiles's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by Al Combs View Post
    Wow, it took 4.6 volts to get 5 amps from an SST-50! I thought they were supposed to have a low Vf. Page 8 of the Luminus pdf on the SST-50 says it only takes 3.6 volts to get 5 amps. What's up with that?
    Actually, if you read the data sheet again, you will "not" find a statement from them stating that every single LED will consume 5 Amps at 3.6 volts. Note #3 on the table says that those are only "typical values" -> some LED's will have low VF's, this one I got clearly has a higher VF than "typical".

    Quote Originally Posted by SFG2Lman View Post
    prolly a lower or an unknown bin, the data-sheet will be for the highest binned
    Yup, this is one of the unknown bins PhotonFanatic got as early samples

    Will
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  5. #5

    Default Re: Playing a little with an SST-50 ...

    And the Vf wasn't measured at the LED was it? At 5A there will be a fairly substantian drop in the wires.

    space

  6. #6
    *Flashaholic* wquiles's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by space View Post
    And the Vf wasn't measured at the LED was it? At 5A there will be a fairly substantian drop in the wires.

    space
    You are right, in that with the long cables that I used there will be a voltage drop on the cables, so next time I need to measure the voltage at the LED, which would have been lower than the voltage shown at the power supply.

    I will try to take another measurement tonight.

    Will
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  7. #7
    Enlightened Flash_25296's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Out of curiosity what is the internal resistance of the DC Power Supply that you are using for testing and how does it compare to the resistance of the wire you are using?

    Here is a useful guide for using Agilent Power Supplies
    http://cp.literature.agilent.com/lit...5965-8239E.pdf

    Tip 1 is inline with your concerns so maybe you could add that into your setup to better regulate the source.
    Disc Golf is good for your soul

  8. #8
    *Flashaholic* wquiles's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by Flash_25296 View Post
    Out of curiosity what is the internal resistance of the DC Power Supply that you are using for testing and how does it compare to the resistance of the wire you are using?

    Here is a useful guide for using Agilent Power Supplies
    http://cp.literature.agilent.com/lit...5965-8239E.pdf

    Tip 1 is inline with your concerns so maybe you could add that into your setup to better regulate the source.
    This is a 9Amp, 60V extra heavy duty bench supply, so the internal resistance is not the problem. However, as space correctly pointed out, the long and thin wires that are OK for most of my experiments at 1 amp or so are not adequate for 5Amps.

    Here on top, on my bench DMM I have the voltage at the LED (1.28 volt drop on the wires!), and as you can see it is more in line with that we expected initially to see: 3.39V volts at 5Amps



    I will try another experiment, maybe tonight, where I am going to direct drive the LED from that BIG F cell - I will use short wires

    Will
    Please no PM/Visitor Msg's. Email for questions/Paypal: wquiles [at] gmail {dot} com. Please visit my new website.

  9. #9

    Default Re: Playing a little with an SST-50 ...

    couple inches of this should work

    http://www.knukonceptz.com/productDe...?prodID=KFX0BK
    If and when the the big dookie hits the fan, and global chaos ensues, i want a couple of quality AA lights within reach.

  10. #10
    Enlightened Flash_25296's Avatar
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    Default Re: Playing a little with an SST-50 ...

    I have worked with supplies like this before and hooking up the sense lines to the load is a good way to go. Glad to hear you have a solution to better test your device

    Did you check out the link, try the remote sense lines and lets see what happens
    Disc Golf is good for your soul

  11. #11

    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by wquiles View Post
    Here on top, on my bench DMM I have the voltage at the LED (1.28 volt drop on the wires!), and as you can see it is more in line with that we expected initially to see: 3.39V volts at 5Amps
    Will
    Glad to see you got a good one.


  12. #12
    *Flashaholic* wquiles's Avatar
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    Default Re: Playing a little with an SST-50 ...

    OK, not quite a full host either, but I am starting to take some beamshots with various reflectors and one Aspheric glass lens:

    From left: Metal reflector I got from Jo (Britelumens), Barbolight Deep Reflector, DX MC-E reflector, Glass Aspheric lens I bought years ago from online surplus store (maker/origin unknown, but many were bought here in the forums at the time):



    Camera on tripod - manual exposure - auto white balance.

    Pointed at the ceiling - about 3.5 to 4 foot away - light off:



    Pointed at the ceiling - SST-50 at 5A - Jo's reflector:



    Pointed at the ceiling - SST-50 at 5A - Barbo reflector:



    Pointed at the ceiling - SST-50 at 5A - MC-E reflector:



    Pointed at the ceiling - SST-50 at 5A - Glass Aspheric:





    Pointed across my "shop" at the knee mill - light OFF:



    Pointed across my "shop" at the knee mill - SST-50 at 5A - Jo's reflector:



    Pointed across my "shop" at the knee mill - SST-50 at 5A - Glass Aspheric:



    Pointed across my "shop" at the knee mill - SST-50 at 5A - Barbo reflector:



    Hopefully by next week I might have enough time to make something more "portable" to take outdoor beamshots

    Will
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  13. #13
    Flashaholic* nanotech17's Avatar
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    Default Re: Playing a little with an SST-50 ...

    that Aspheric Glass bemashot is crazy,so focus



  14. #14
    Flashaholic* rizky_p's Avatar
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    Default Re: Playing a little with an SST-50 ...

    any outdoor beamshots Will?
    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)

  15. #15
    Flashaholic* tx101's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Will, I believe the Surplus Shed aspherical lens is the same one as the MG
    lens I used in my SST-90 build

    Hmmm .... I think it is mentioned somewhere in LuxLuther's aspherical lens shootout

  16. #16
    Flashaholic* Aircraft800's Avatar
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    Default Re: Playing a little with an SST-50 ...

    The surplus shed was indeed a 01 LAG 123, the link is still floating around here their part #PL1072. It is the MG 52 x 37 one, it just has a new part number now.

    http://www.surplusshed.com/pages/item/pl1072.html

    CVI Melles Griot part number is LAG-52.0-37.0-C
    Last edited by Aircraft800; 10-14-2009 at 01:49 PM.

  17. #17
    *Flashaholic* wquiles's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by rizky_p View Post
    any outdoor beamshots Will?
    Hopefully by next week



    Quote Originally Posted by tx101 View Post
    Will, I believe the Surplus Shed aspherical lens is the same one as the MG
    lens I used in my SST-90 build

    Hmmm .... I think it is mentioned somewhere in LuxLuther's aspherical lens shootout
    Quote Originally Posted by Aircraft800 View Post
    The surplus shed was indeed a 01 LAG 123, the link is still floating around here their part #PL1072. It is the MG 52 x 37 one, it just has a new part number now.

    http://www.surplusshed.com/pages/item/pl1072.html

    CVI Melles Griot part number is LAG-52.0-37.0-C

    Thank you guys - I bought those a while back - maybe 2 years or more, and last night was the first time I tried one. Glad I tried with the SST-50
    Last edited by wquiles; 10-14-2009 at 02:35 PM.
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  18. #18
    Flashaholic* Aircraft800's Avatar
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    Default Re: Playing a little with an SST-50 ...

    Quote Originally Posted by wquiles View Post
    Thank you guys - I bought those a while back - maybe 2 years or more, and last night was the first time I tried one. Glad I tried with the SST-50
    Will,

    I don't know what we were thinking. At DFW GTG we had SST-50's pushing 5.2A, DEFT aspherical lens, and 01LAG123, but we never gave it a try. saabluster even had a few SST-90's, we never lit em up. We'll have to have a GTG in my garage or something where we can use a power supply and do some testing.

    Just too much going on that night!

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