Damn… differs 400 lumen between VJ and VK voltage bin at 6.8A…
Do they have same color? (cool white I assume)
I guess you got the VK from aliexpress and someone said they sold factory rejects. It could be because of that to it has less lumens.
Both VK and VJ had same type of Mcpcb?
Yeah. Really cheap. I have a few on the way but got a message from intl-outdoor that my order was cancelled because the Noctigon XML was out of stock.
So now I have no good Mcpcb’s for them…
Who bought them all ?
Edit: What alternative store are the for buying some good Mcpcb’s with good shipping for EUROPE?
Is there a thread about this that I have missed?
I know LEDDNA got some SinkPAD ones. Anyone else?
Try Kaidomain.com KD DTP copper MCPCB-s. It need a little mod in soma lights for the screw and wire holes don’t match perfectly but it is a minute job.
Ohh, wait! You got that FET to work? Oh boy - I got one working ok with the modded MT03, but yanked it thinking it might be causing 7135 issues. Turned it wasn't the FET, but never installed it back. Then the other day I tried one in a Q8, and it dodn't work at all, nothing - 7135 rmaping would work, and as soon as it got up in the FET range, it stayed at the max 7135 level. 2X click to turbo produce no light at all -- all consistent with the FET simply not working.
Maybe I got a bad part, or messed it up on the reflow - it all buzzed out ok but maybe I fried it. Will try another one though seeing you got good results with it.
Yeah Tom, I’m running it on a 20mm Mtn. FETDD driver with that guppydrv. rev1 UI, no 7135 at all, just piggy backed it on the X3 driver board. I was popping the 404DP, I thought it was due to the re-flow heat, out of 5 I got 1 to work??? :person_facepalming:
I use the SIR404DP's pretty much exclusively now - pretty cheap at Arrow, qty 10 @ $1.67 each. got a ton of them in lights.
Big advantage of the SIR800DP or 404 is they run real cool, cranking a lot of amps. Richard posted bout it way back. You get over 6A or so, and 800 or 404's is the only way to go.
you may need to bake them a while to drive out moisture if they are popping during reflow.
i salvage lots of these fets from junk laptop boards without problems so you may simply be getting them too hot.
edit.
these are msl 1 so unlikely to popcorn.