XML2 U3

After spending filing down a penny the other night to fit in that pill, this doesn't sound fun at all. I might give it a shot anyway. Hopefully Fujik isn't that hard to remove...

Tin snips make quick work of getting rid of the bulk of material, then a bit of filing to final size. No way would I be able to do any of this without my beloved left/right/straight tin snips. :love:

on sinkpads?
i was considering doing this, but thought it may cause the traces to contact the copper star causing a short

It might, but even if it does the filing/sanding to final size gets rid of that. They cut really cleanly though.

based on your recommendation i will endeavour to sacrifice one soon

what grit sandpaper, or do i start low and work my way up?

Cut to within around 1/16" of the final size, then take the rest off with a hand file. Sandpaper would take several forevers.

I'll give that a shot with a penny. Even if I only get a few straight snips off, filing it back to round and down to the final diameter would be a lot less than only using a file.

Thanks for the Testing TOM E . What is the Name of the Bad Seller?

I started a new thread don it here: https://budgetlightforum.com/t/-/20318. Info in OP.

Ok here is my bit on these "U3" emitters.

I actually ordered U2 from a supplier who has be very reputable up to this point. When the package came they were marked U3. I figured well they either are or they are not, makes no difference since I was expecting U2.

I didnt do any special testing for output and had no problmes with them at all until I de-domed one. It died at 6.5A. So I backed down the driver current to 4.9A. Then tried again with another. Same result. Poof again. So I assumed the problem must be a short in the driver, so I replaced the driver. De-domed another emitter in the gas, and the next day tried again. Still POOF> I did another and this time dropped it on the ground and when I picked it back up it would not light so that one we will call "my bad"

Anyway we come to the 5th emitter ( ALL of these wire on a sinkpad refllowed to a copper heat sink btw) This one actually handled the current, but it turned black right around the bond wires and put a little black fog right near them.

I tested that driver on a NW de-dome XM-L2 I had with no problem at all. In fact I have never had this kind of problem ever. Once in a while we all lose an emitter, but 5?

AM I really just this much of a SPAZ this week or is there really something different about these?

Has anyone else tried a high current de-dome app with these?

You must have missed this thread.

Its not you, its the emitters.