I just built a dual coil on my Nimbus V3 clone using 28 gauge kanthal and the ohms comes out to be .7ohms. My question is, is the .7 ohm resulting from two .35 ohm coils or are they both .7ohm? I bought a MNKE IMR 18650 1500mAH battery for sub ohming and the battery chart shows that the specific battery is safe around .5 ohms, but I don't know if a .7ohm dual coil is safe for it.
RDA Microcoil question
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For you to have a net 0.7 ohms at the 510 connector, you would have two 1.4 ohm coils (parallel circuit halves the resistance)... unless I am mistaken?
The resistance that your battery will see is .7 ohms. Your battery doesn't care what resistance each coil is rated at, just the final resistance. I am not a professional, but if your battery is rated to handle a .5 ohm resistance and your coil is metering at .7 ohms then I would think you should be fine.
If that is the case its perfect, but I always thought that... .35ohm + .35ohm = .7ohm (.7 is what is reading on my vamo).
They are both .7 ohms. Dual coil rda will always be half the amount of the coils.. So yes both your coils are .7 making the unit at .35
Very good, too bad I have my vamo v5 and my nemesis is in the mail right now... The Vamo wont fire so I suppose I need to put this RDA away until the Nemi comes in!
if its rated for .5 then youre ok at .7
but yes, like posted above, if you were to insert only one of the two coils you made, you would have gotten a ~1.4 reading. but because you went dual coil, the second coil cuts the resistance in half, therefore resulting in a .7 ohm coil.
read around, theres many threads explaining the details of wrapping your own coils.
good luck!
do you know the ampere rating for that battery? if im not mistaken the mnke batt is rated at 30A...could be wrong.
but yes, like posted above, if you were to insert only one of the two coils you made, you would have gotten a ~1.4 reading. but because you went dual coil, the second coil cuts the resistance in half, therefore resulting in a .7 ohm coil.
read around, theres many threads explaining the details of wrapping your own coils.
good luck!
do you know the ampere rating for that battery? if im not mistaken the mnke batt is rated at 30A...could be wrong.
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Not true. If the atty is reading .7 ohms on a dual coil device then each coil is 1.4 ohms.
EDIT - After rereading you are correct but I am taking OP's post to mean that the atty is reading .7 ohms on a meter, meaning he/she has two 1.4 ohm coils.
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Oppps read his post wrong a lot of numbers haha.. I got the concept right at least ha..
why?
just take out one coil and run it at 1.4 ohms. im running a 1.35 ohm coil at ~16 watts and that thing is a fog machine.
The battery is rated at 20amps.
So since my PV reads the dual coils at .7 ohms, and that each coil is 1.4ohms, I'm technically not sub ohming yet?
no, with dual coils at .7 ohm, youre sub ohm alright. hahaha. like i suggested above, if you were to take out one coil to make it able to fire on your vamo, then you would not be sub ohm because you would be at 1.4 ohm.
sub ohm is anything under one ohm, put it that way.
When running dual coils, and you use an ohm meter to check the ohms of the SETUP, you get a reading ( for example .7 ohms) and if you were to take each coil and test them individually you will get 1.4 ohms each. In parallel resistive applications, the total ohms ( in the case of 2 coils/resistors) is basically 1/2 of the 2 coils
heres the math:
1/ ((1/r1)+(1/r2)) ... r1 = coil1 ohms , r2 = coil2 1ohms sooo r1 =1 ohm r2 = 1 ohm rtotal = 1/2 ohm
In series resistive applications it is r1 + r2 ( ex. 1.4 + 1.4 =2.8)
heres the math:
1/ ((1/r1)+(1/r2)) ... r1 = coil1 ohms , r2 = coil2 1ohms sooo r1 =1 ohm r2 = 1 ohm rtotal = 1/2 ohm
In series resistive applications it is r1 + r2 ( ex. 1.4 + 1.4 =2.8)
Awesome, I just took one out and it read 1.2 but with some adjustments im up to 1.4 and it heating up great. A little slow start up but it gets the heat
You are indeed running a sub-ohm coil. A dual coil setup running two 1.4 ohm coils has a final resistance of .7 ohms. Your battery sees a sub-ohm coil. It doesn't know or care if you have 2, 3, or 4 coils. It only cares about the total resistance. And your resistance is sub-ohm.
MNKE are rated to 25 amp, Sony US18650VTC3/US18650VTC4 are rated 30 amp. When building dual coils, total ohm will be half of a single. It sounds like you have 2 1.4 ohm coils which results in a .7 ohm dual coil. Your MNKE will work just fine on that.
This is a handy tool if you plan on sub-ohming
vapecalc.com
We can use an example with your current build (.7 ohm)
So .7 ohm at 3.7 volts (assuming your using a mech) will give you aprox 5.3 amps
safe to use with the MNKE!
Hope this info helps, and always make sure to err on the side of caution when it comes to battery safety....
Cheers!
This is a handy tool if you plan on sub-ohming
vapecalc.com
We can use an example with your current build (.7 ohm)
So .7 ohm at 3.7 volts (assuming your using a mech) will give you aprox 5.3 amps
safe to use with the MNKE!
Hope this info helps, and always make sure to err on the side of caution when it comes to battery safety....
Cheers!
Thanks for all the replies guys, really helped me out. I took a coil out and its running great and producing great vapor. I can't wait till I get my nemesis so I can start sub ohming. I don't want to go as low as .6ohms just because of all the risks.
nice!
good to hear.
now, remember that airflow also has a role in your vape experience. now i know most of my RDAs ive received have had too small of a stock airhole for my liking. so take that into consideration on your next build too. especially if youre going sub ohm.
also ohms law calculator is a very useful tool. i downloaded the app to my phone for when im not around a computer. just search it.
glad you figured it out!
any questions, just ask!
if i cant answer em, im DEFINITELY sure someone else here can! btw, welcome to ECF!
nice!
good to hear.
now, remember that airflow also has a role in your vape experience. now i know most of my RDAs ive received have had too small of a stock airhole for my liking. so take that into consideration on your next build too. especially if youre going sub ohm.
also ohms law calculator is a very useful tool. i downloaded the app to my phone for when im not around a computer. just search it.
glad you figured it out!
any questions, just ask!
if i cant answer em, im DEFINITELY sure someone else here can! btw, welcome to ECF!
You just reminded me to ask another question, I'm using the Nimbus V3 Clone which I believe has 1/16 airholes, is drilling up to a 5/64 a good idea?
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