GGW-H20L 6x Sled GB!!! THE EPIC GB THREAD LAWL!!!

[rkcstr]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

So, how do they get these things and have no idea what they are?? Do they just find a box of these in some warehouse and decide to sell them? Or go dumpster diving outside of Sanyo? ;D

 

[Krutz]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

Or go dumpster diving outside of Sanyo?  ;D

i think i would join them.. ;-)


yeah, what the hell are they? cant wait for some graphs! its been only weeks that i got my phr ones, and now they are already all old and boring.. still in their sleds..

manuel

 

[daguin]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

[quote author=rkcstr link=1223438970/880#881 date=1226765400]Or go dumpster diving outside of Sanyo?  ;D

i think i would join them.. ;-)
yeah, what the hell are they? cant wait for some graphs! its been only weeks that i got my phr ones, and now they are already all old and boring.. still in their sleds..
manuel[/quote]

That's only because you didn't pay $400 for it

Peace,
dave

 

[Kage]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

Hey AMK,
please put me down for 2 in GB-4 if these turn out to be 6x or better.
Thx

 

[Ace82]

Re: 6x Blu-ray SLEDS!!! GROUP BUY!!!

 (NEW BUYERS WAIT FOR BATCH 3)

I am waiting. ;D But seriously. I gotz to get in the 3rd batch... [smiley=2vrolijk_08.gif]

 

[LRMNmeyer]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

I hope these are 12x's...

What's the correct current for the 4x diodes? The reds are 16x's, right?

 

[IgorT]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

I hope these are 12x's...

What's the correct current for the 4x diodes? The reds are 16x's, right?

There is no such thing as correct current...

I just wanted to give a report on my test 4x... By now it degraded deep into the first kink, and has a badly deformed spot... This is somewhere upwards of a hundred hours now (need to check the counter)...

So this particular diode by now survived a long time of normal use. And it's still going strong, but it fell in it's own first kink. If i were to raise the current, it would once again be at it's former power, but would start degrading even faster, obviously..

Under the first kink it would have probably lived for thousands of hours. Just above it would seem to be hundred(s?)...


If you want it to live "forever", set it just bellow the first kink. No one but you can find out where this is. It's obviously different for each diode, altho most of them would seem to have it jst when they start reaching 140mW. That happens somewhere between 140-150mA so at 135mA they would probably live "forever" (= x000 hours)..

If you want to get the safe-max out of it, limit the driver to 150mA and slowly turn the pot until you see the spot deforming.
Then back off a little, until the spot is normal. Then turn it off, let it cool off, turn it back on, check that it's not mode-hopping when cold.

If you want to get the slightly less safe-max out of it, limit the driver at 170mA, and slowly turn the pot until you see the spot deforming.
Then raise the current a little more, to bring it out of mode-hopping, so that the spot is normal - just above the first kink. Turn off, let it cool off, power-up, check that the spot is not deformed when cold. Let it warm up, check that the spot is not deformed when warm = diode just above the first kink. Here it would seem to live x00 hours. Or maybe just 1x0 hours, not sure yet...

If you want even more power, raise it to just below the second kink, but don't be surprised if it pops in several tens of hours.

For the above, i would recommend using the most simple linear driver, possibly with a multiturn pot in series with a max-current-limiting resistor, to prevent overshooting the maximum currents. When you're done finding the right current, switch to the final driver, don't forget to discharge the caps.


Or you could also just look at Rkcstr's graph, and select a current from it. The kinks are visible there. If yours happans to be in a kink at a current, where the graph isn't, adjust accordingly.



The reds are 16x's, yeah, but they are 16x's on crack. They are the same diode as in Dilda, and would seem to be somewhat similar to an open can, only canned.



EDIT: The power of the test 4x at this moment is 126.6mW. If i were to lower the current a bit, the power would actually become higher, because right now, the spot is badly distorted.

Hard to say what these should be powered at. It depends on what you want.. I don't yet know how long it will live, nor what i should do. I could leave it as it is, long enough for it to degrade to just bellow the kink, so the beam returns to normal and the power goes up. I could raise the current and bring it out of the kink, but that would skew the test.

If i would have set it just bellow the kink, it would have a higher power than it has right now, and it would live for thousands of hours most likelly.

 

[Zom-B]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

lol you beat me to it again igor. Although I must say your entire description sounds exactly like PHR-803T diodes, and for those the figures are a bit optimistic. So far, I have one that set in the middle third tier (after the second kink) died after 78 minutes (162mW), and one set at the end of the first tier (just before the first kink) died after 250 minutes (189mW(!)). The latter had a very high first kink starting at 198mA. Currently I have another PHR set to the beginning of the third tier and use it with an adjustable lab driver and only use that power when I need it. (a tier is the straight range where no mode shifting takes place)

I also just discovered and refined the method of finding kinks by looking at the mode shifting (technically it's not hopping). You should look very carefully at the spot though (preferably on a fluorescing surface like paper) because the start of a mode shift is very slow and almost not even visible. Further into the mode shift, are the shifts faster and more obvious. See Re: PHR-803T batch testing.. Windowless 803Ts?

Furthermore you imply that the readers know the direction in which the kinks move with temperature (even if it doesn't matter when your directions are exactly followed), so here are the facts: When the laser is cold, the kink is lower than when the laser is warm (and it emits more mW). When the laser is cold, the wavelength is longer than when it is warm because at higher mW, the wavelength is longer.

 

[IgorT]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

From my experience, the wavelength climbs more with temperature, than with power (at a constant current). A cold laser will have a mW or two more, but the few mW is usually not enough to bring about the same wavelength shift..

If i let this 4x cool off, it has a mW more but the wavelength is shorter. If i let it warm up, it has a few mW less, but the wavelength is almost the same as a hand picked high wavelength PHR, when viewed through a filter i have for this purpose.. The "Nichia lens" confirms this, as the power increase is greater when cold, than when warm - shorter wavelengths get increased more.

Theoretically, a very short wl. diode could warm up and climb in wavelength so much, that while the actual power was dropping with efficiency, the after plastic lens power would seem to be "shooting up", which was reported a couple of times for this, and i saw it with PHRs.... I didn't have a proper lens back then to test this theory. I am hoping to find such a 4x, and test it with the glass lens, while it is "shooting up" in power. If i'm right, the power with the glass lens will actually be dropping while this is happening. The other possibility is mirror alignment.


Otherwise, the kink shifting is strange. I had diodes that warmed up and went into the kink and this one warms up and comes out of it. In both cases the diode was just above a kink. That's why i recommended to test it both warm and cold and set the current so, that it is out of the kink in both cases.

But they are indeed hard to detect, so when the kink becomes noticable, it may be best to go 10-15mA back, for an easy and simple approach.


One thing is sure. 4x's are better than PHRs. For a PHR the figures would be optimistic, but i did mention that when i put a PHR through the same testing at 150mA, i get 3-20 hours... The 4x is by now way over 100..


P.S. Yea, i know it's not "mode-hopping", i tried to correct myself, when writing it...

 

[IgorT]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

Amk: I can imagine, it is probably hard for you to decide what to do now, with all the doubts and everything..

I would suggest something like this:

You could say, for example, "IF the diode is as good as or better than the 4x, who want's one?", and collect the potential orders...

I will pay for USPS Express for the sample, and not too long from now, we will have several tests of the diode (at least three or even four graphs), and then you can throw the batch 3 money at the manufacturer, and collect batch 4 payments for those who say they will buy it if it's "the same as or better than the 4x".


Some people are saying "I will buy it ONLY IF it's really a 12x", but that will be impossible to determine for sure anyway.

What will be possible to find out is, if the diode is better than a 6x for example. So the "only if 12x" orders might want to convert to "as good as or better than the 6x"....

I think the 6x is a very good diode. I may have pushed mine a bit too far, in anticipation of the "6x's", but it did survive months of heavy use at 198mA before that. And it is still alive. I just measured it at 211mW where it was weeks ago. I think it's our expectations that are too high.

 

[mophead]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

As far as I am concerned, if it is as good or better than what I ordered at first, I'm still in.

No reason not to be.

 

[Montana64]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

I will keep my request in for 2 sleds in batch 3. (im not pulling out)

Ted

 

[daguin]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

DANGER WILL ROBINSON, DANGER​

Please examine the pictures in this eBay auction.  These diodes are the diodes (the B0323) that GooeyGus got out of the Toshiba HD-A3 (IIRC the model).  The diodes were roughly equivalent to the DT-0811 diodes -- 130mA current tops.  Here is the link to the auction:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:VRI&item=140282313295

Now compare them to the pictures we have of these "12X" sleds

I think we have our answer to the mystery.

Peace,
dave

 

[carulli]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

Wow nice find dave they look exactly the same!!!

 

[rkcstr]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

I agree they look more than similar (I'd have to say identical). That would also explain the lack of a "third" diode (ie blu-ray, red and IR), which it looks like the one has 4 pins (which I noticed before), which appears to be a combined red/IR diode, ie low power (definitely not going to stick two high power dies in one can).

It appears our "too good to be true" is just that, but here's hoping that for some reason I'm wrong.

 

[daguin]

Re: 12x Blu-ray SLEDS GB! 450mW!! Sanyo 12x!!

In the picture of the copper sheet, you can even see where there were originally two labels in the same places as in the sled in the eBay auction.

Peace,
dave