Reply to "Smoke Units and DC..."

That's what I generally see to produce good smoke.  When I'm testing, I use straight DC on the bench so it's easy to compute the power in my head. Generally I find by the time you get to around 8 watts, you're getting lots of smoke!  I actually "tested to destruction" a smoke unit once, I ran it with 12 watts for an extended period.  Even keeping smoke fluid supplied it managed to really coat the wick and reduce the output within about half an hour.  If you don't keep it wet at 12 watts, it'll smoke the PCB.