questions on the okl 120 board

[Mattp169]

OK so ive been really considering getting a mod with this okl 120w board
like a hexohm v2
or a dimebox mod etc

everywhere i read says .3 ohm is the lowest you should go
and that has me confuzzled

using ohms law
.3 ohms at 6v give syou 20 amps

ok

so if you go lower then .3 ohms and fire the device at the full 6vs your going to pull over 20 amps and that is BAD BAD BAD

BUT these mods have a potentiometer to control the voltage

so say i use my standard SS build which is at .14 ohms
and i usually use that in a regulated mod at 50ws
using ohms law
you get 2.65v at 18.9 amps

so since the okl board only can fire down to 3.6V
using ohms law
a .14 ohm build is going to draw 25.71 amps at its lowest setting
Once again VERY VERY BAD

SO back to ohms law
using 3.6V and 20 amps
you get a .18ohm coil at 72W

So HERES MY QUESTONS

1.IF you keep the Voltage output on the okl board at 3.6V can you safely run a .18ohm coil on it? Or is there something Im not understanding about these boards?

AND
2. All these calculations are based off a 20amp battery such as a LG HG2 or samsung 25r..WHat if you were to use a 30amp continuous discharge battery such as the LG HB2 or HB6 Could you then run lower then .3 safely because once again using ohms law 3.6v, 30 amps 108w and .12ohms so that looks OK
But at 6v that same coil will draw 50 amps and be at 300w Which is very very very very bad bad bad.

SO can using 30 amp batteries allow for lower builds provided you dont raise the voltage too high.

 

[f1r3b1rd]

I have the hex, which uses that same board - maybe some others know more about the board and can correct me.

It is my understanding that it's a variable voltage board that got its birth to control LED lights.

It will fire whatever you put on it. I've fired mine with as low as a 0.18 ohm load at the 3.7v (76w) but for a second to see if I would.
The problem ism like you said the board is rated at 20a so should you fire beyond that you run the risk of burning out the board or worse.
I always look at those limits as a safety precaution for both me and the investmemt in the device. That board is a great performer. If you get it, you'll enjoy it.


Edit:. 0.3 ohms let's you utilize the board to its fullest potential

 

[PaulS]

I have a Hex in the trading section. I've been running it with a .25 coil at around 4.5 volts. No issues at all. I would not go below .25 though. I've seen people burn the board out - happened to the owner of our local B+M running a .14 ohm coil in it.

 

[Mattp169]

so its not just a question of battery safety...its also a matter of how many amps the board itself can handle?