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Thread: Q5 XR-E on Star, okay to de-solder?

  1. #1

    Default Q5 XR-E on Star, okay to de-solder?

    Just found the Q5-WG for $10.5 listed on the DX site.

    Since it's already soldered on Star MCPCB, will it be damaged if I de-solder it on the BBQ hot plate?

    I dropped my Lumapower M1 by accident and the glass dome on XR-E was separated. M1 use another smaller type MCPCB, and this Star MCPCB won't fit. I don't know if it's okay to de-solder and solder it again? (solder twice)

    Thanks.
    Last edited by NetKidz; 07-09-2007 at 07:42 AM.

  2. #2
    Flashaholic* chesterqw's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    i don't think anything bad will happen.

    if you are willing, you could sand/file down the edges till it fits perfectly.

    safer then de-soldering.
    if killing was legal, i would have killed countless number of people...

  3. #3

    Default Re: Q5 XR-E on Star, okay to de-solder?

    I just looked again and here's the engine:


    I think I could just file a small bit and press into it.

    Thanks.

  4. #4

    Default Re: Q5 XR-E on Star, okay to de-solder?

    I'm going to have to agree with another CPF dealer on this one. Unless DealExtreme shows a picture of the bin labelling, I'm not going to buy it. A single WG tint Q5 bin from Cutter is $28.61 shipped including "CPF1" discount ($29.75 without discount). I can't imagine that DX can get them for $7-$8 each to sell them this cheap. They may have just found info that the Q5 was out and indicated as such.

    Until someone does a side-by-side comparison to a known Q5...I won't believe that it is true. Be careful what you order.
    Last edited by wintermute; 07-09-2007 at 08:15 AM.

  5. #5
    Enlightened
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by wintermute View Post
    I'm going to have to agree with another CPF dealer on this one. Unless DealExtreme shows a picture of the bin labelling, I'm not going to buy it. A single WG tint Q5 bin from Cutter is $28.61 shipped including "CPF1" discount ($29.75 without discount). I can't imagine that DX can get them for $7-$8 each to sell them this cheap. They may have just found info that the Q5 was out and indicated as such.

    Until someone does a side-by-side comparison to a known Q5...I won't believe that it is true. Be careful what you order.
    Cree has announced that they are shipping Q5 bin leds in volume. I think that after recent improvements Cree has made the Q4 and Q5 bin leds are now or in very near future just as common as P3 and P4 bins have been until now.

  6. #6

    Default Re: Q5 XR-E on Star, okay to de-solder?

    When Kai was selling Cree P3/P4 mixed batches - they indicated as such. They also said that DX was getting the same batches - just telling everyone they were P4.

    If they really have the Q5s - they need to take a pic of the bin label on the spool and post it.

  7. #7

    Default Re: Q5 XR-E on Star, okay to de-solder?

    I sure hope its Q5 bin. that'll be great news for everyone of us who's held out spending close to 30 dollars on one. I hope someone can prove without a doubt if its Q5 or not.

  8. #8
    Flashaholic*
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by wintermute View Post
    .... I can't imagine that DX can get them for $7-$8 each to sell them this cheap....

    Actually, this IS the sort of price Cree XREs are sold for wholsale.

    Other dealers may well have paid a premium for Q5s a few weeks ago, and are now regretting it...

  9. #9
    Flashaholic* Szemhazai's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    In Poland, about 6 month ago, our distributor was selling P3 stars for 6,5$ at the same time the lowest price in other EU countries was 11-12$ (at the same time in my city Lediko claimed 14$ each). So Cree is giving huge part of final price to local distributors I think...

  10. #10

    Popcorn Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by kakster View Post
    Actually, this IS the sort of price Cree XREs are sold for wholsale.

    Other dealers may well have paid a premium for Q5s a few weeks ago, and are now regretting it...
    We'll see what happens. There's more info that's out there that hasn't surfaced yet...so we'll see.

    But they have to sell them at a profit...plus pay for shipping...all for $10. Like I have already said, until I see a picture of the bin label on the spool (should be very easy to take) or a side by side comparison by someone here - I will be hesitant.

  11. #11

    Default Re: Q5 XR-E on Star, okay to de-solder?

    is there a seoul equivalent using the Q5 as a base yet ?

  12. #12
    Flashaholic* 2xTrinity's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by mountainpenguin View Post
    is there a seoul equivalent using the Q5 as a base yet ?
    The increase in output from P4 to Q5 may not in fact be due to changes in the blue die (that the Seoul is based on) but improvements in the phosphor efficiency and packaging. If that is the reason for the improvement there is no reason the Seoul would automatically improve -- as the Seoul already has a more efficient (but unfortunately significantly less durable) packaging. If it is related to improvements in quality of the blue die, then that should lead to comparable boosts in Seoul performance.

    Either way though, manufacturers don't explicitly try to make Q5, or P4, or whatever bins, they usually just try to make their LEDs as efficient as possible, and due to random variatons, some end up being better than others. After they are made, the LEDs are sorted into bins by performance. For example, right now it looks like the only color bin available in Q5 is WG. Cree probably just recently some huge batch of emitters that all happened to have similar color (WG) and efficiency (Q5).

    As for the DX emitters, I will probably buy some simply because I know the color bin is decent -- IMO that is actually more important to me than the flux bins as minor increases in brightness usually aren't highly noticeable, but variations in color certainly are.

  13. #13

    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by mountainpenguin View Post
    is there a seoul equivalent using the Q5 as a base yet ?
    Theoretical numbers:

    SSC U-bin:
    min @350mA: 91lm - @750mA: 164lm - @1000mA: 200lm
    max @350mA: 118lm - @750mA: 213lm - @1000mA: 260lm

    Cree Q5 bin:
    min @350mA: 107lm - @750mA: 193lm - @1000mA: 235lm
    max @350mA: 114lm - @750mA: 205lm - @1000mA: 250lm

    In short - yes, sort of...you could get a SSC which performs less...then again, you could get a SSC which performs more. With the Crees, the bin numbers are closer - so you can more accurately plan what you're going to get. @350mA, the SSC can vary by 27 lumens, the Cree will only vary by 7 lumens.

  14. #14
    Flashaholic* chevrofreak's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by wintermute View Post
    I'm going to have to agree with another CPF dealer on this one. Unless DealExtreme shows a picture of the bin labelling, I'm not going to buy it. A single WG tint Q5 bin from Cutter is $28.61 shipped including "CPF1" discount ($29.75 without discount). I can't imagine that DX can get them for $7-$8 each to sell them this cheap. They may have just found info that the Q5 was out and indicated as such.

    Until someone does a side-by-side comparison to a known Q5...I won't believe that it is true. Be careful what you order.
    DX doesn't seem like the price gouging type.

  15. #15

    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by wintermute View Post
    Theoretical numbers:

    SSC U-bin:
    min @350mA: 91lm - @750mA: 164lm - @1000mA: 200lm
    max @350mA: 118lm - @750mA: 213lm - @1000mA: 260lm

    Cree Q5 bin:
    min @350mA: 107lm - @750mA: 193lm - @1000mA: 235lm
    max @350mA: 114lm - @750mA: 205lm - @1000mA: 250lm

    In short - yes, sort of...you could get a SSC which performs less...then again, you could get a SSC which performs more. With the Crees, the bin numbers are closer - so you can more accurately plan what you're going to get. @350mA, the SSC can vary by 27 lumens, the Cree will only vary by 7 lumens.
    thanks a lot for explaining this, I didn't even see it this way before.


    "DX doesn't seem like the price gouging type."

    Chevrofreak, I ordered a one because you make good point, I'd think they have more to lose if they did that.
    Last edited by CandlePowerForumsUser; 07-09-2007 at 11:39 AM.

  16. #16
    *Flashaholic* easilyled's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by wintermute View Post
    I'm going to have to agree with another CPF dealer on this one. Unless DealExtreme shows a picture of the bin labelling, I'm not going to buy it. A single WG tint Q5 bin from Cutter is $28.61 shipped including "CPF1" discount ($29.75 without discount). I can't imagine that DX can get them for $7-$8 each to sell them this cheap. They may have just found info that the Q5 was out and indicated as such.

    Until someone does a side-by-side comparison to a known Q5...I won't believe that it is true. Be careful what you order.
    Although, I understand your scepticism, if you look at the difference between
    Cutter's price for the Q4 and Q5, its absoloutely enormous even though there
    is only a marginal difference in output.

    I think if Cutter can afford to sell the Q4 for so much less than the Q5, it
    tells you far more about what Cutter is charging for the Q5 than DealExtreme.

    So DealExtreme is not undercutting Cutter , rather Cutter is exploiting the
    unfeasible desire amongst us to have the latest immediately.

    At least that's how it seems to me.

    In any case, since DealExtreme is now an authorised Dealer for CPF, we can
    ask them directly and they would be taking an enormous risk if they were
    not being truthful.
    We are all flotsam and jetsam being carried by a relentless tide towards our ultimate fate!

  17. #17
    *Flashaholic* IsaacHayes's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    If you file the star, make sure to test with a DMM to see if the contacts arent shorted out. Sometimes that can happen if you are filing/griding and a solder pad or trace gets pushed into the aluminum burs.
    Mags: 2C: R/O, True Cyan, UV. 3C:Penta-XR-E Q5, Single SSC P4. Nitecore D10, Fenix LOD-CE, ArcAAA

  18. #18

    Default Re: Q5 XR-E on Star, okay to de-solder?

    http://www.candlepowerforums.com/vb/...d.php?t=169064

    I'm not certain that the Q5 bins are even available yet. Do what you wish - I look forward to seeing how they perform. Don't think that I am anti-DX. I just ordered a cheap light yesterday...just being weary.

  19. #19
    *Flashaholic* easilyled's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    I wouldn't read anything into Cree's roadmap. They have never stuck
    to the timings in the past and it is no surprise that they haven't now either.

    The nature of improvements in led efficiency is not very predictable time-wise -
    it happens when it happens.

    This can be earlier or later than expected.

    It won't be difficult for anyone to measure the output of the Q5s on sale
    compared to the Q4s/Q2s etc.

    I really don't think there's anything underhand going on here.
    We are all flotsam and jetsam being carried by a relentless tide towards our ultimate fate!

  20. #20
    Flashaholic* ace0001a's Avatar
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    Eh, for the most part I've had good results with DX. I wouldn't peg Kyle to be the shifty type. I've also been told by a US LED dealer that the guys in Asia seem to have a MUCH EASIER time getting emitters from Cree and SSC than he does here. So it never surprises me that Asia get the new emiters fast and cheap. Personally I can't understand why the US reps for these companies are more difficult to deal with, but apparently they feel that there's a bigger market for their LEDs in Asia.

  21. #21

    Default Re: Q5 XR-E on Star, okay to de-solder?

    Quote Originally Posted by ace0001a View Post
    but apparently they feel that there's a bigger market for their LEDs in Asia.

    Thats strange but it seems it could be true... I have a buddy who visits China to find manufacturers to buy bulk products and he gets LED flashlights as well. He told me LED is huge in China, they use it ever where from building lighting to whatever you can think of that would need a light source.

  22. #22
    Flashaholic
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    Default Re: Q5 XR-E on Star, okay to de-solder?

    i bet they are Q5s, the timing is only slightly early and i trust kyle. just ordered 4 Q5s and a l2dce. i picked ems shipping so hopefully i can let you know soon

    even if hes wrong and they are Q4 or even Q3 isnt that the best price you can find anywhere for anything better than P4?

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