Maybe it’s not (only) the dielectric layer that is better than usual, but it may well be (judging by the picture) that the copper layer on top is thicker than usual.
I was thinking XQ-E, but they’re probably too small for that.
…and the gap between the solder pads is smaller so there is more copper directly under the center of the led. (I did not ask specifically for an extra thick copper layer, and have to look up what thickness I actually got)
I mean, the djozz board versus the generic board. I know the copper core weighs more than the aluminum one. I’m wondering how much difference there is. Just curious.
I’m sorry Lexel, lots of things going on on BLF today, and then there is a life too (work, shopping, making dinner, reading book to my son, comforting him later at night when he wakes up with bad dream).
I will go through my PM’s now.
Sorry for the long wait Lexel, finally replied your PM.
(for doing practical work on the hobby I have monday exclusively atm, busy with work, family and St. Nicolaas festivities, just catching up with hobby administration today)
I used these MCPCB’s to test a nichia 229AT today. The results were surprisingly good. It beat out the 219C all the way up to 4.5A when the lack of a thermal pad and DTP caught up with it.
They have the lowest Vf I have seen to date as well!