A Perfect Dedome?

Got a “This video is private” error… Please show us your privates!

sorry, fixed that, there they go

The few times I've tried it, that's what mine look like too except not at 1mA, but at full power |(

I am the Dedome King ! Watch this (in HD ):

Not bad for a very first attempt at hot dedoming , I am a happy modder.

This is what came out, no further cleaning needed:

And it works (at least up to 50mA, the picture shows 1 mA):

That's amazin stuff! I guess you could reflow, then de-dome in one fell swoop! I assume that's an XP-G2 - you are a better man than I -- I never would have attempted a de-dome technique the first time on a XP-G2.

“This video is unavailable” error…

I did reflow and with the led still hot dedomed it, the video is one shot (and perhaps a lucky one ). The led is a XP-E2 R3, 1D tint.

It is going into my 'budget test-thrower' (49mm reflector, led @2A), just to see what an extreme pencil beam will look like . I may do a beamshot and some lux-readings if it gets finished this weekend .

I am not sure what happened, I made it public this time. Anyone else can't see the video from post #87 ?

I can see it

ok, I was inspired by the post of zizo and quickly finished the mod mentioned above. Just two pictures, hope you don't mind, Tom? (I do not want to derail this thread):

reflector 49mm, dedomed XP-E2 R3 1D-tint on copper, screwed on pill, arctic silver in between , driver LD25 2.0A, tailcap:2.0A. Ceiling bounce lumen estimate: 290 lumen. Throw (measured at 2 meter,3 meter and 5 meter, same results): 170klux@1m (165klux after 5 minutes), functionality: zero, this is an utterly useless flashlight.

beamshot:

I don’t know about that. Looks like it would be handy trying to find buoys out on the water. In that situation, flood reflects off the water and boat and blocks your far view. That light you built is sweet. Looks like you could see buoys way, way out there.

Funny you mention that, I have done that many times during sailing boat races at night here in Holland, but that was 10 years ago. At the time we had big maglites for that (very useless), and lead-acid battery powered big halogen lights, those were great, but lasted 7 minutes on a battery. And now we have this in our pocket . But still an aspheric would be even better for buoy-searching because of the total lack of spill

djozz - I don't mind at all and it's not off track, that's the next phase, what are the results and what do we do with these de-dedomed emitters?

This is probably the thread to note that

I’ve wasted >$100 trying to dedome mtg2s

You CAN shave the dome off with a razor, but the phosphor is thicker than you think, and the throw gains are not as high as with other emitters (neither are the output losses).

Petrol - no go, all the phosphor will come off the center of the emitter

Same with acetone.

If you try the ‘off heatsink heat method’, the dome will bubble at the emitter and pull the phosphor off…and it takes a @#$% load of power to do that…these things can handle some serious current…

100% agree. This is the only kind of thrower I need - tight aspheric beam to avoid back scatter on the water.

In NY state, the water is often much warmer than the air (particularly in late summer and fall). The amount of back scatter at night is ridiculous. you can’t see anywhere if there is any spill.

But, if camping on a small island, this makes for quite a surreal experience - fog rising all around but no fog on the island - and there’s still a cold/clear upper atmosphere and so many stars visible 8)

GUZZALEEEN!!!!!111one

I wouldn't have tried this on a U2 otherwise, but this one was dead after a reflowing screwup, so no loss if it didn't work. Guess what? It works now. It was dead, completely dead. I'm sure it's not 100% healthy, but light comes out when you put power to it.

Nice build and numbers. What light/host are you using to get those kind of numbers?

That is sad, sorry to hear that you ruined many of those . At least by mentioning it here people are warned not to try it themselves.

It is this light from dx, I think it is a good deal, one of the few large reflector lights under $20, it is not too heavy, but there is enough aluminium near the pill and the body is one piece, good for heat spreading. The reflector is also aluminium, had to file some away to stop it touching the solder joints of the led-board.

But I seem to be the only fan of it, the problem may be the 'coffee' colour, I don't like it either. I use it as a test thrower because it is very easy to mod. It has its third driver now and its fourth emitter , and I guess the current set-up will also not last long...

Looks a lot like my Small Sun ZY-T619 here which I got for 50% off, like $13. Been on my list to play with, but no time. Thought it was an X9 clone, but not quite the same quality, bit disapointed.

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