A Perfect Dedome?

[Hunter]

He is just posting here to make us all jealous

[Mitko]

KawiBoy1428 : that emitter and this potted and modded resulted as 2500 lumens, 285k cds at start in a L2 host.
8.6 tail amps, 2.3 emitter amps
The driver builds up heat quite fast realy, it should be cooled properly

Whitch brings our favourite host to a whole new level

Have to find a decent L6 driver though

Tn42 will be the next to mod!

Those i got from Arrow Europe, Cutter is kinda away plus Arrow also got those here.

[KawiBoy1428]

Mitko, just build a driver adapter out of aluminum, or my favorite copper rings! The heat sinking with the copper rings is substantial, I run the LD-2 17mm at 12+ amps in the L6 using the copper ring adapter’s!

Pretty impressive L2, little light with a big powerful long throwing beam!! :+1:

Got to LOVE THAT!!

[X31 (-X3-)]

I use hot dedome and it quite works with those tiny XP-G2
Direct drive during 10s on a tiny alu MCPCB then lift the dome with a scalpel blade.

[giorgoskok]

I think there is still some silicone left there X3 , weird actually .

I only use hot dedome for xp-g2/xm-l2/xp-l now , quick and easy ! Also i think most of the times , tint is better than gas dedome ( tested it with some identical leds ) .

[Mitko]

X3

With the same method mentioned above

And with an AR glass the tint drops from 1A to something like 2B, pretty sure most f BLFers will like it, pretty cold for my taste though yet ppl like cold lights

Yes, dding using pure gas changes the tint , however i aitn using gas for that

Last C8 XPG lights came out 190k+ wondering should i post them in the sell section :money_mouth_face:

[luminarium_iaculator]

Now that is “real” emitter for single cell fet lights, and the best de dome method.

I am following plenty of post from our dear members here and Hot dedome :person_facepalming: Mitko also though that this is the “right and only good one”.

So I am glad that you change your mind regarding this cause hot de dome is real mess no matter if you de dome seconds after reflowing or by crappy 18650 dd battery method.

[giorgoskok]

@luminarium iaculator

So I am glad that you change your mind regarding this cause hot de dome is real mess no matter if you de dome seconds after reflowing or by crappy 18650 dd battery method.

Why hot dedome is a real mess ?

[luminarium_iaculator]

@giorgoskok

@luminarium iaculator

So I am glad that you change your mind regarding this cause hot de dome is real mess no matter if you de dome seconds after reflowing or by crappy 18650 dd battery method.

Why hot dedome is a real mess ?

Cause it is. Below is example of less successful 18650 dd battery hot dedoming (silicone remains):

@~~X3~~

And dedoming after reflowing is bit cleaner but there are more than 60% of chance for leftovers on de domed emitter + 60% chance of failure.

What could be easier than hot gas and similar like nitro cleaner for example?

[zeremefico]

You haven’t heated it enough.
I use heat until solder unter led is melted, I wait a few seconds to get solid again and then I lift the dome with the tip of a sharp knife.

[luminarium_iaculator]

It is the far worst de-doming method even famous modders that swore about it abandoned it.
You guys can de dome the way you like but I know(since I tried all) which method is the best for me and I have same results like Mitko or MEM from this thread. You can de dome with plenty of solvents but the key is hot or heated solvent not cold(although it works even this way just with more silicone residues…).

[AlexGT]

@Mitko

XHP35 with a hot running muxture ot medical beznine, trimethylphosphate, kerosene, and coresiline

At last a 100% nice results, absolutely no tint shift, !a is even better than 3D

Like 22-24% better than Hi version , nearly no lumen loss( like 5-6%)

Congratulations Mitko :+1:

So Mitko, Could you please share your awesome formula? Would love to know exactly what brand of chemicals you used and in what proportion

medical beznine Brand Concentration How many ounces
trimethylphosphate Brand Concentration How many ounces
kerosene Brand Concentration How many ounces
coresiline Brand Concentration How many ounces

At what temperature was the mixture? Did you dunk it? Upside down? Liquid flowing over the dome? How much time did it take? How did you clean the dome afterwards for silicon or chemical residue?

Thanks in advance for sharing such great information, you will have made a ground breaking contribution for the hobby.

AlexGT

[Enderman]

@zeremefico

You haven’t heated it enough.
I use heat until solder unter led is melted, I wait a few seconds to get solid again and then I lift the dome with the tip of a sharp knife.

Heating up an LED this much is an absurdly horrible thing to do, and severely decreases it’s lifespan if it survives.

[giorgoskok]

@luminarium iaculator

It is the far worst de-doming method even famous modders that swore about it abandoned it.

You’re not telling us WHY it is the worst method .

Yes , dedoming lots of leds at once takes more time than hot gas (etc) method , but i don’t see other disadvantage . I’m talking for xp-g2’s .

[Enderman]

@giorgoskok

You’re not telling us WHY it is the worst method .

Yes , dedoming lots of leds at once takes more time than hot gas (etc) method , but i don’t see other disadvantage . I’m talking for xp-g2’s .

It’s extremely obvious…
Why do you need anyone to tell you.
Pieces of dome can be left stuck on the die, dome can get burned, phosphor can get burned due to very high temps, phosphor can rip off with the dome, etc etc etc.

[EasyB]

@Enderman

@zeremefico

You haven’t heated it enough.
I use heat until solder unter led is melted, I wait a few seconds to get solid again and then I lift the dome with the tip of a sharp knife.

Heating up an LED this much is an absurdly horrible thing to do, and severely decreases it’s lifespan if it survives.

Heating up the LED is a necessary step for reflowing. It’s not as horrible as you make it seem.

[Enderman]

@EasyB

Heating up the LED is a necessary step for reflowing. It’s not as horrible as you make it seem.

No, ideally you would only heat up the solder without heating up the LED too much.
Heating it does decrease it’s lifespan just like with literally every other electronic component.
Why do you think they put temperature ratings on them?

[BobbyMK]

What is the best way to dedome XPL V6 1A, i haven’t had much success dedoming XPL leds, i find it much harder than dedoming xml2 or xpg2.

[BobbyMK]

@BobbyMK

What is the best way to dedome XPL V6 1A, i haven’t had much success dedoming XPL leds, i find it much harder than dedoming xml2 or xpg2.

Anyone?

[Hunter]

@Mitko

Yeah m8, i got my hands of a S4 1A roll, i also got some S4 1D with even better hunting tint yet i do keep them for special occasions

Hi Mitko, is there a way to recognise this old good XPG2 S4 1A leds from new one that have worse performances than old leds?