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try to get a reading on a 405nm diode with G2 lens if you have.i see you mostly use 3 elements,you don't really enjoy the G2's? :evil:

its nice to have returning member on the hobby,wish our community was bigger,at least we are not drawing much attention to the hobby that way :shhh:

double post to add some info. finally i found some time to make some further testings on power losses with the refocusing method and i have to say RedCowboy that you are partly right about the power loss especially on 42 compare to 08 i made the test with exactly same optics(1xG2 and 1x 3...

oh a rare diode but it doens't make so much difference as you said.i think 420nm would be the best as it will be still purple but with better visibility than 405's. my bdr 209 hits around 412nm(or somewhere close to that) and it has a tiny difference with a blue hint compared to my 405nm s06j,i...

we can't guarantee you that your driver will work without spikes and no you can't see that without oscilloscope and you can't notice anything from the diode power with bare eyes,a current spike can even kill a diode before makes out any light from the ld(it happened with my psu when i was still...

670ma???? well you beat the hell out of it with that current and you are even lucky that lasted 30 minutes with this current and this cheap driver.bdr-209's are running good at 550ma anything more and its risky on every power up to see a nice led. get a proper laser driver and if you are seek to...

nice review i also have the pocket lpm v2 and works nice,for 80$ i wouldn't ask for anything more. sorry for you lost n465 diode,this is a bit expensive diode :cryyy:

i had a full day and didn't find time for the testings,sorry about that. yeah it will do the job nicely for what you bought it for. i think that pocket lpm reviewed when it was the version 1 out and was horrible and no one messed up with it again after that.after the v2 came out seems to be...

i do have this lpm but to be fair im not using it that much anymore because i found out that the readings especially on lower wavelengths was way high especially on 405nm range and this could happened due to the uncoated white sensor, we know the ability of the lower wavelengths to be absorbed...

if you are hunting for well focused gball diodes out of the box without to have to remove the can you should always buying the 06's as those have the best percentage of good focus compared to all the rest of the nub series, especially nubm42 looks to be the worst so far. the gball is still...

i'll try to find some time tomorrow to do a power tests on both nubm08 and nubm42 to see exactly the percentage loss of power on both diodes.my guess is that will both have same % power loss while you saying that on the nubm42 case the 3 element lens crops the output that coming from the G2...

yeah not an arguing here that there is definitely a power lose but im pretty sure there is not a cropped(clipping) output cause if i look closer the output with glasses i clearly see the edge of the light emmition(smoothly fainting light),if it was cropped the edges should look like cut or sharp...

nope i didn't make a power reading after the extra optics but im guessing it will be the same as nubm08,how did you saw the power lose without an lpm? don't mistake the beam visibility vs the 3 element and G2 and gball cause the 3 element makes a bigger diameter beam and that makes the...

those are some great news then RedCowboy we actually have a nubm05 divergence with the power of the nubm08 at 455nm. yeap i know that still the nubm44 is still the power king out there but im still interested on different wavelengths and divergence on those diode range. did you powered it up...

today i found some time to test out the new nubm42 diode i received and i have to say i found some interesting results. there will be not a lot of photos but i'll share the differences i found out compared to other diodes. nubm42 is very identical to the nubm08 and the power test is almost the...

actually if the resealing method was good without mistakes and also used some gas inside instead of "air" those diodes could be as good as new but we don't have info on those yet aside that we didn't hear yet any random deaths

yes you are right those diodes are identical to the gball diodes but i would guess that those are not coming directly from the manufacturer with those big window cans,could be a reseller that decanning the gballs and placing those new cans. either way the final products are good but the problem...

as laserbee said please make a welcome post for a small introduction. in your problem now,did you completely removed the lens and took the picture of the bare diode output?if so this look like you touched the diode window(or your lens in case the pic include the lens) with your fingers and left...

I'm glad I helped you to figure it out,if you are planning to get the nubm44 diode pair it with a stronger driver or else get a lower power diode like the ndb7875 to run it with this driver,it will be a shame to have 4w of underpowered diode with this terrible divergence.

just to make it clearer you only have to care about current when driving a diode and only check the voltage needs to get the correct driver(boost or buck-linear),in your case if the driver says 2.5A max then you can't run your diode any higher than that no matter the total watts you were measuring.