.3 ohm single vs. .3 ohm dual

[junkfixr]

I've been building the Magma with 26g kanthal and I did dual coils that came out to .3 ohms. When I fired it on a mech, it took way too long to heat for my expectations. I built a parallel single with 26g and it reads .3 ohms but glows instantly. Same amount of wire, same diameter, same resistance, but altogether different firing characteristics. I'm not understanding why, other than coil length.

How do you build dual coils and get them to glow instantly? I got a mech mod assuming it would have the power to run duals and that .3ohms = .3ohms regardless. Obviously I'm overlooking something and have a lot more to learn about coil builds. Some pointers would be very much appreciated.

 

[dw117]

A parallel coil will heat up quicker than a normal dual coil with the same resistance. If you think about the two individual pieces of wire heating up, when they are touching each other the current will not only heat up the wire itself but also the wire next to it, and vice versa.

Having said that I would expect a 0.3ohm dual coil to heat up just fine. Have you checked that the leads are making connection down tight and as with the magma you'll have 2 leads in each post that are both sitting flat and making good connection? You don't want one lead on top of the other.

 

[crxess]

Worried when people say instantly. Instant usually means shorting territory or darn close.

You did not say, what Battery source are you using? I have seen significant time variations from one rating to another.

* Note - throwing the Magma into very low sub ohm range, you might want to keep an eye in the plastic divider in the well.
They don't handle heat well. This I have already accidentally confirmed in one of mine.

 

[junkfixr]

Not having any issues and both builds work fine. I'm using a fully charged 18650 and was curious why one coil heated instantly but dual coils took much longer. I realize the build is a little low but the Magma is all I have to experimenting on.

Is this just something you accept with dual coils? Do you just allow for some lag time before you vape it, or maybe building with 28g will heat up quicker? Just curious as to your experiences and recommendations to heat dual coils faster.

So far, I'm liking the parallel single better and will shoot for a little higher resistance.

 

[Norrin]

Just to be clear this parallel single? You mean a dual coil wound at the same time, because you can't have a single parallel coil.

 

[junkfixr]

Yes. (2) pieces of 26g, wound parallel to one another, into a single coil. However, taking the same length of wire, separating it, doing the same amount of wraps, creating two separate (dual) coils, reading the exact same resistance, takes far longer to heat up and I guess I was looking for the science behind why. Both methods produce a reading of .3 ohms.

Maybe I shouldn't over think it and just use what works.

 

[Dissonance]

Norrin, don't confuse people When someone says a single parallel coil they mean a single coil wrapped with 2 wires running parallel to eachother.

@OP, parallels always heat quicker than anything else, period. If you were to make a regular single coil at .3Ω you'd find it heated slower than the parallel as well. There really shouldn't be much ramp up time using 26g for a .3Ω dual coil, did you wick it up & try it out or are you just assuming since it takes longer to glow it's going to require a ramp up?

 

[junkfixr]

No, sir. I didn't wick it, just experimenting with a Fuhattan and Magma. I had the misconception that since the battery wasn't regulated, but essentially flowing from positive to negative with a mere .3ohms standing in the way, that it would glow like a hot stove. Myth busted!

I'm doing it safely with a 20 amp battery but just curious if it's normal to give it some ramp up time? How does a beginner get the most out of a dual coil build?

 

[Norrin]

Norrin, don't confuse people When someone says a single parallel coil they mean a single coil wrapped with 2 wires running parallel to eachother.

I wasn't trying to confuse people I was trying to understand what he had done.

Thanks for the answers

 

[junkfixr]

I'm finally getting somewhere, I believe. I used some 24g that I got this week, did 6 wraps around a 5/64th bit and it's giving me .5 ohms resistance. Just using this single coil it heats relatively fast, semi-warm vape, but the flavor is incredible!

I'm assuming the Magma really isn't a cloud chasing atty as much as it is a flavor atty. It does a decent, thick cloud but actually tasting the juice on your palate without drinking it (like a flooded Evod) is telling me I'm getting closer to building it properly.

 

[dw117]

Like someone said that original dual coil might have been ok. They do take longer to get red hot when you're firing them with no wick.

If the single coil you've built is working well, then vape on that for a bit and don't over think it haha. As long as it's safe. Build dual coils and parallel coils once you've gotten good at single coils. You don't want to run before you can walk.

Also yes the magma isn't for cloud chasing but produces great flavour. Glad you got it sorted. Watch some coil building tutorials on YouTube in the meantime.