Hi all,
I have a 2D Mag running 8.4V input and its a direct drive build for now, but my FET DD switch is on its way to me now for future upgrades.
Essentially, I want to run 2 MTG2’s in parallel so that both emitters require just 8.4V input. My thinking is if a single MTG2 in my other 2C Mag MTG2 DD build gets about 4.5A at tailcap off 8.4V input. Should I not be seeing 6~10A at tailcap off a twin MTG2 parallel build?
I wired the + on both LED’s to each other, then the - on both LED to each other. Last I choose one of the two LED’s and wired that one direct to the Mag switch +/-. Is this correct?
Amps will, if i am not mistaken, be the same or just a little higher. A single mtg2 can pull up to 9amp+ so the 4.5A is the most your batteries can give out. The wiring as I read it should be correct for parallel.
Thats is a possibility that the switch is having resistance.
The easiest way of telling how many amp each led is seeing is by measuring tail cap amps and deciding by 2.
The most accurate may is by measuring at the LEDs it self. (One led can pull more amps then the other, but it will be in margine of error)
I was incorrectly checking the tailcap current. I actually have around 5.8A at tailcap
I checked one LED at the bezel and it’s 3A solid. So I’m actually getting ok current. I’m not terribly disappointed considering these 2 MTG2’s make the bezel HOT in minutes.
I can only imagine how hot the bezel would get if I got 10-12A at tailcap. That would be serious heat problems
Do you have your springs copper braided? It helps quite a bit. I've built Mags with stock switches that pull >7a at the tail on stock switches. I'm also looking into improving the mag switches themselves.
I soldered a thick wire in spring the same way braided copper is used. I have braided copper and used it in tailcap springs too, but just cant seem to find it in my stuff since my latest residence move.
The switch can be dramatically improved by simply spraying Deoxit into the switch where you normally insert the T8 bit. I noticed at least a 25% increase in tailcap current spraying into switch and working it 50ish times to make sure it spreads evenly inside switch.