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Hard Numbers on the NUBM44-81 ?

There is 10, but they seem to be more than the older ones. I didn't think there was much of a difference, just freak diodes and/or a problem with my LPM, but hoping they were better because of being newer, but after seeing DTR talking about newer ones being stronger I then realized my speculation WAS true!

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It only figures that quality control is going to make improvements, I remember when just a little too much current meant POP LED, but now they shunt and recover, the strained lattice gain medium is grown not printed as far as I know, I expect improvements will always be made because 20,000 hours is a lot and that's likely to half brightness, with the goal being efficiency they have to get stronger as improvements I bet are made on current runs as well as unseen test diodes, real world feedback is good information and of course they use it and make improvements, today's freaks are tomorrows standards.

That's what I am thinking.
 
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RedCowboy said:
It only figures that quality control is going to make improvements, I remember when just a little too much current meant POP LED, but now they shunt and recover, the strained lattice gain medium is grown not printed as far as I know, I expect improvements will always be made because 20,000 hours is a lot and that's likely to half brightness, with the goal being efficiency they have to get stronger as improvements I bet are made on current runs as well as unseen test diodes, real world feedback is good information and of course they use it and make improvements, today's freaks are tomorrows standards.

That's what I am thinking.
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What are these diodes usually used in ?
 
DTR pulls them from different manufacturers video laser projectors he buys in bulk cheaper than most of us can, and he buys them new. Ca$io is one, I believe. There was some ruckus in the past from that company sending legal notices not to use their name in relation to harvested diode in this forum, so most vets won't reference what machines they come from, I don't even know myself. If I want a full block I can find them reasonably priced without tearing a machine apart.

RedCowboy said:
I bet the maker studies their own freaks under a scope and sees what makes them better, then they alter the process to make them all that way and so on.
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I believe you, Eimac, a high power vaccum tube manufacturer did that to study why some units would store for decades without leaks. Medical science is studying human freaks who don't appear to age much on a cellular level as well as those who do exceedingly fast. At some point, I expect we will be able to get gene therapy to keep our cells young.
 
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Alaskan said:
DTR pulls them from different manufacturers video laser projectors he buys in bulk cheaper than most of us can, and he buys them new. Ca$io is one, I believe. There was some ruckus in the past from that company sending legal notices not to use their name in relation to harvested diode in this forum, so most vets won't reference what machines they come from, I don't even know myself. If I want a full block I can find them reasonably priced without tearing a machine apart.
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I wasn't thinking anything like that, I was just wondering what a block of 44's was used for....
 
Was a little curious of a 7.2W reading from a DTR sourced NUM44 I bought in April,,
not anymore:):)
The other thing that's killing me of not having machinery access anymore is not having access to barrels of AL and CU end stock pieces:(
 
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From what I can figure the 44/47 distinction seems to be weather it is an 8 bay block vs a 10 bay block. The discontinued line of projectors had NUBM44-71(8 bay block with seven diodes), NUBM47-T(Ten bay block with 8 diodes), and NUBM47-A1(ten bay block with 10 diodes) These all seemed to test out to be the same diodes hoving between 6.8W-7.4W @ 4.5A just configured differently for the different lumen version of these projectors. I have only pulled a NUBM44-81 from the new series projectors that replaced them but there probably is a 47 ten bay block variant as well that is updated and assume it has a new -xx number and the same diodes as the -81's. The NUBM44-81's since I started selling them I have had several people say they LPM'ed them above 8W which if right sounds like the new series have slightly more powerful diodes. Lets keep watching the feedback and see how it turns out because as noted before if you do cool the diodes or report a peak reading on a fast response sensor that can skew the data quite a bit.:beer:
 
DTR said:
From what I can figure the 44/47 distinction seems to be weather it is an 8 bay block vs a 10 bay block. The discontinued line of projectors had NUBM44-71(8 bay block with seven diodes), NUBM47-T(Ten bay block with 8 diodes), and NUBM47-A1(ten bay block with 10 diodes) These all seemed to test out to be the same diodes hoving between 6.8W-7.4W @ 4.5A just configured differently for the different lumen version of these projectors. I have only pulled a NUBM44-81 from the new series projectors that replaced them but there probably is a 47 ten bay block variant as well that is updated and assume it has a new -xx number and the same diodes as the -81's. The NUBM44-81's since I started selling them I have had several people say they LPM'ed them above 8W which if right sounds like the new series have slightly more powerful diodes. Lets keep watching the feedback and see how it turns out because as noted before if you do cool the diodes or report a peak reading on a fast response sensor that can skew the data quite a bit.:beer:
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When do you think it changed? The 03/2017 ones seem to be outputting more than the 2015-2016 ones I was getting.
 
Accutronitis said:
I'm just trying to get an idea what kind of a projector uses that many diodes ?
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I listed them in post 16 in reference to these exact diodes, but there are many brands of units, some use all LED's, its all built around the DLP chip method of projection.

The problem with data projectors has been the bulb so years ago Cxxxx company had Nxxxx company make laser diodes for them, now green laser diodes are not as efficient and that means more heat so they use blue lasers to pump phosphor, because running for hours makes heat a big BIG deal.

Do you know how a DLP chip works?

These are some units > https://www.ebay.com/sch/i.html?_fr...jector.TRS0&_nkw=laser+dlp+projector&_sacat=0



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@ Ricker : It's probably not a big change at all, just a slight revision that makes them a little more resilient and or efficient and that means we get a little spike when we overdrive, they are all good diodes, I have many over a year old that have seen daily use and are plenty strong. P.S. I am looking for a good LPM that can read up to 50W at a good price...LOL..... I know
 
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