Brando's Bored: Single Strand 26g Dual Coiled Lemo Fun

[Brandon David]

So...

I got bored earlier and decided to play a bit and for no reason in particular, I decided on trying out this build. I've never done a single strand dual coil build-- let alone one for a single coil style atty. Specs are 2.5mm ID 26g A1 working nicely at .3 ohms. Sorry about some of the pics being on the blurry side. My iphone didn't want to focus at times.

The phone wouldn't focus on cold coils (as you'll see in a bit) so I snapped a cool down when I was almost done adjusting things


Not great, but not terrible for a first try


Now to figure out wicking. Hmmm... let's try this.


Twist 'em together and feed them through



Now for a haircut.


Tucked on down. (there's that cold coil focus referenced earlier :-/) The coil on the left is a bit off but they fire in unison so I'm satisfied. I'll try and pretty it up better next time.


Add a little juice and test fire. Yup, she definitely gets down.



Still trying to find the sweet spot but it looks like about 40w has the perfect vapor/flavor balance with this 60/40 juice.


Hope you enjoyed it. I sure did.

 

[RandyF]

I tried this with nickel the other day, on a Lemo also. It worked, but the wraps where the coils are bridged were heating up faster than the other side. had to scrap it.

Also, the trick getting good close up pics. Put more distance between your phone and the coil, then zoom in.

 

[Brandon David]

Also, the trick getting good close up pics. Put more distance between your phone and the coil, then zoom in.

Thanks for the tip!

Yeah, I was surprised mine heated as evenly as it did. What's more surprising is how fast it seems to cool off. The only thing I can think of is I have a coil on each leg with the single strand portion passing through a post hole separating them as opposed to two coils on one leg (as far as the even heating goes, that is) which makes it more similar to a traditional dual coil.

I'm pretty happy with it thus far.


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[RandyF]

Thanks for the tip!

Yeah, I was surprised mine heated as evenly as it did. What's more surprising is how fast it seems to cool off. The only thing I can think of is I have a coil on each leg with the single strand portion passing through a post hole separating them as opposed to two coils on one leg (as far as the even heating goes, that is) which makes it more similar to a traditional dual coil.

I'm pretty happy with it thus far.


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After looking at a zoomed view of your pic I see what you did, and yeah, that is the difference. I was trying to do a dual series coil in mine, but one side heating first is a problem I don't think there is a solution to.

 

[Brandon David]

After looking at a zoomed view of your pic I see what you did, and yeah, that is the difference. I was trying to do a dual series coil in mine, but one side heating first is a problem I don't think there is a solution to.

I don't believe so either and I figured in series it may be a bit much on the bridge since there has to be a fair bit of separation for appropriate airflow.

One never knows until it's tried and you verified it, unfortunately. Haha


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[Trypno]

The backing off the phone and letting the camera refocus on the coils seems to work. For some reason, when you're too close, the iphone focuses on the background rather than the foreground. I took this pic with my iphone:

 

[weaksause]

Hey glad I found this thread mi ordered a manhattan clone w good reviews off amazon and when that comes I'll give this a go on my lemo. I can't wait.
Here's a question I haven't found the answer to, when u r putting a duel coil on a lemo which has only two posts where do the four legs go? Sry it's a lame question
Thx for ur post !!

 

[Brandon David]

Hey glad I found this thread mi ordered a manhattan clone w good reviews off amazon and when that comes I'll give this a go on my lemo. I can't wait.
Here's a question I haven't found the answer to, when u r putting a duel coil on a lemo which has only two posts where do the four legs go? Sry it's a lame question
Thx for ur post !!

2 leads of 26g fit in a single post hole but the leads can also be trapped directly under the screws.


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[CloudKick]

Some of you here are wiring your coils in series, which as an electrical engineer, I'm still scratching my head wondering why?

 

[brickfollett]

Some of you here are wiring your coils in series, which as an electrical engineer, I'm still scratching my head wondering why?

To keep the ohms up for my regulated mods was one reason. Just takes a while to spool with heavy gauge wire though. I agree that a dual 30 gauge in parallel would be more ideal but the surface area from heavy gauge wire, wrapped in series really does put out alot of flavor and vapor

 

[CloudKick]

To keep the ohms up for my regulated mods was one reason. Just takes a while to spool with heavy gauge wire though. I agree that a dual 30 gauge in parallel would be more ideal but the surface area from heavy gauge wire, wrapped in series really does put out alot of flavor and vapor

Right but it will heat one coil faster than the other which to me seems to go against the point. I think if resistance is the issue there are other ways of getting larger surface area without compromising the efficiency of the system?

 

[brickfollett]

Right but it will heat one coil faster than the other which to me seems to go against the point. I think if resistance is the issue there are other ways of getting larger surface area without compromising the efficiency of the system?

No both coils heat up at the same rate as long as they are the same amount of wraps. It wouldn't make sense for them to heat up at different rates. If that were true, then our micro coils wouldnt heat up from the inside out (they do). I've built it and seen it in action, I did a dual series 26 gauge on my kayfun for my provari and they lit up exactly the same. Any variances in spool time are just due to human error in building the coil, nobody's perfect

 

[CloudKick]

? Are you using a post between the coils? The definition of DC electricity is running one direction, meaning it would heat up one coil before going to the next... It's a little more complicated than that but for our purposes that's what it is. That's why Christmas lights go out when you pull one, they're wired in series...

 

[brickfollett]

A regulated device doesn't use true DC current though, good ones like provaris come close but they're still AC. that argument only applies with mechs and even then I still disagree. If I take a piece of kanthal and touch is to either post of a car battery, does one side heat up faster than the other? I don't think so. Same concept with a mechanical mod, and should still apply with a regulated mod.

All that said, it's not a huge issue either way. We've both made our case and I'd rather just leave it where it is before this starts spinning out of control

 

[CloudKick]

A regulated device doesn't use true DC current though, good ones like provaris come close but they're still AC. that argument only applies with mechs and even then I still disagree. If I take a piece of kanthal and touch is to either post of a car battery, does one side heat up faster than the other? I don't think so. Same concept with a mechanical mod, and should still apply with a regulated mod.

All that said, it's not a huge issue either way. We've both made our case and I'd rather just leave it where it is before this starts spinning out of control

I'm not trying to spin it out of control, I'm trying to educate, if not you, at least others that see this post. You do realize that AC current does not recognize resistance right? It's impedance, meaning your ohms law no longer applies if you were using an AC current... Its a different formula and has many more variables. And yes, a piece of kanthal will heat up on one side before the other, you just can't measure the speed it does. The reason coils heat from the inside is because you're creating an electromagnetic field when you coil... That's what transformers are, coils. Otherwise we would just use a piece of straight kanthal instead of a coil. Nevertheless, I will cease the conversation. You can google impedance vs resistance.

 

[brickfollett]

I'm not trying to spin it out of control, I'm trying to educate, if not you, at least others that see this post. You do realize that AC current does not recognize resistance right? It's impedance, meaning your ohms law no longer applies if you were using an AC current... Its a different formula and has many more variables. And yes, a piece of kanthal will heat up on one side before the other, you just can't measure the speed it does. The reason coils heat from the inside is because you're creating an electromagnetic field when you coil... That's what transformers are, coils. Otherwise we would just use a piece of straight kanthal instead of a coil. Nevertheless, I will cease the conversation. You can google impedance vs resistance.

Haha beyond me at that point. I feel like the rate of coils heating up would me very close to each other though, and series coils are the only real way to make setups that use more than 4 coils. Never bothered though

 

[CloudKick]

Haha beyond me at that point. I feel like the rate of coils heating up would me very close to each other though, and series coils are the only real way to make setups that use more than 4 coils. Never bothered though

Check out deedupdex' builds you can google that name