Just looking at your build.
Did it really need a heatsink that size ?
I'll be using a 20-0-20 Transformer (because that's what I've got).
Am I correct in thinking that the two MOS-FETs closest to the rectifiers will be dissipating :-
((20 x 1.414) - 10) x Iout.
If I use Iout = 200mA
That leaves me dissipating 37W x 2 of course.
I think I've just answered my own question, I got 4W first time round.
37 W x 2 so 74 W in total for a device existing out of 4 JFETS ( drawing the current of a single LED in each channel) and some resistors that can be fed with a 2 x 12 V 7 VA transformer ?!?! Do you think that is really necessary ?
Last edited: