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12x BR DIODES






Hemlock_Mike

Hemlock_Mike

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You can buy the sled now. It is just inside the drive and costs only $203 :crackup:
HMike
 
FrancoRob

FrancoRob

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LarryDFW said:
FrancoRob;

You are getting different slopes than I did.

The threshold current must be subtracted from the current reading to get the slopes reported in the diode data sheets. I estimated the threshold currents to be the same.

I took (Power out / Current In - Threshold Current).

I got 1.42 mw/ma for the Nichia.

I got 1.43 mw/ma for the Quisp diode.

That is only a 0.7% difference.

LarryDFW
Click to expand...

Yes, Larry, I know :yh:, your formula is: [Po/(Ci-Ct)]

Using this assumption, the "Relevant Efficiency" results are:

Nichia: 1.422222
Quisp: 1.430769 while for GoldenDragon the "Re" is:

GoldenDragon: 1.690566

My attempt was not to disagree with your data, but to make a further and simply rough estimation in what point of the 12x BR general "Efficiency" range the three diodes could be collocated....

But we have seen that, also if a general technical specification for common characteristics has been surely agreed between the 12x manufacturers, diodes individual characteristics (read "efficiency") may vary substantially between each other, so a preliminary "milestone" will be obtained only from the Igor murder tests.... results! :bowdown:
 
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FrancoRob

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Dave and HMike:

Your capability to "express" concepts in such amusing form is priceless :D! It's a pleasure to read from you....
 
yobresal

yobresal

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I've already thrown 4 of those red diodes away. If you tell me where it is located on the LG 8X drive I will happily harvest one for you. I just take out the 8X diode, the magnets and toss the rest.
 
mfo

mfo

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yobresal said:
I've already thrown 4 of those red diodes away. If you tell me where it is located on the LG 8X drive I will happily harvest one for you. I just take out the 8X diode, the magnets and toss the rest.
Click to expand...

I very much appreciate your offer Luke. However, the only drives these are located in that I know of are the Pioneer BDR-203 and BDR-205 sleds. I believe the LG drives have the LOC reds?
 
StridAst

StridAst

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those flat red diodes do have some potential though.... it's still a powerful red diode. it might not hurt to hold onto them. they are located on the same side of the LG sled as the BR diode, about 1.25 inches away, positioned at an angle. I have the one out of the sled I botched the job harvesting the BR diode from. (Yes, I killed an 8x diode harvesting it) *cry*

Trying to convince myself to buy a 12x instead of another 8x to complete a custom host I have been working on, but I am having trouble convincing myself to spend even MORE when I fried the 8x diode. Anyone know if the 12x pioneer sleds are easier to harvest then the LG 8x? I am not certain if I just hadn't grounded myself well enough first, or if I somehow screwed up the diode trying to get it out of that sled and heatsink which was a real pain.
 
110100100

110100100

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StridAst said:
I botched the job harvesting the BR diode from. (Yes, I killed an 8x diode harvesting it) *cry*
Click to expand...

I'm afraid of doing the same thing, so when I finally get around to an 8x or 12x build I will probably send it off to one of the resident pro's to assemble it in my kryton groove for me.
 
daguin

daguin

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StridAst said:
Anyone know if the 12x pioneer sleds are easier to harvest then the LG 8x? I am not certain if I just hadn't grounded myself well enough first, or if I somehow screwed up the diode trying to get it out of that sled and heatsink which was a real pain.
Click to expand...

The heat sink on the Pioneed BDR 203 and 205 are MUCH easier to remove the diode from. In the LG the diode is surrounded by that "solid" square heat sink. The Pioneers have a much less substantial "framework" style heat sink.

Removing the diode form the Pioneer heat sink is almost as easy as removing the PHR from its heat sink. You just grab it on both ends with pliers and twist back and forth gently. The heat sink just breaks off.

Removing the heat sink from the sled is even easier. In the Pioneer sled, the heat sink is just glued onto the outside of the sled. You just pop it off with a small screwdriver or knife blade and snip through the ribbon cable.

Go to the "tutorials" board and check out the two stickys about the 8X and 12X.

Peace,
dave
 
yobresal

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I have absoluely no problem harvesting any 8X diodes. So long as you have all the right tools it is pretty easy. I have been buying the LG 8X drives because they are the cheapest. So far I have a 100% successful extraction rate for 8X diodes. Maybe there should be more extraction tutorials.
 
110100100

110100100

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If the heatsinks on the Pioneer 12x are more like the PHR then I might be ok as I haven't had any problems harvesting those... eventhough I use a clipper to cut the sink instead of twisting it to break it.

edit: More extraction tutorials would surely be welcome as I am sure it is a point of apprehension for most starting out in DIY lasers.
 
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