DGDC (dual gauge, dual coil)

[Jerms]

I got into making mini coils (micros, but with bore of 2mm-2.5mm) with two wires for some builds. Since it's basically a dual coil (or a coil with twisted wire, minus unneccessary twisting) it allows twice the wraps at the same resistance (or same number of wraps with half resistance).

That got me thinking, what if I used 2 different gauge wires, what could possibly happen? Would it even work? It's two wires, the same length, but with different resistance. Plus the difference that thicker wire heats slower, which I thought might even out with the higher resistance of the thinner wire. Trying out I found it does indeed work, and very well.

There's many variations possible, so let's try them out. Post pictures, results, and ideas here, whether micro, mini, macro, or wherever your imagination takes you. Possible variables.. how much a difference in gauge for each wire; same gauge, one Kanthal and one Nichrome (provides same gauge and different resistance); different gauges of K and N; 3 wires of different gauges. Get creative and lets see what works and what doesn't.

So far I've made one DGDC with 30ga Kantal A1 and 31ga Kanthal. The results was, while there was a slight difference in how much each alternate wrap glowed, the difference was smaller than I anticipated. At 8 wraps each, 16 total, it was 1.1ohm if I remember right. Pictures following..

Sent from my LGL55C using Tapatalk 2

 

[Jimi D.]

I think they would be out of sync. Do they go off at the same time? Might even drain the battery faster.

 

[Jerms]

Ahhh. Title was meant to be DGDC, not DGDG. Oh well, maybe a mod can change it, or not, not that important. Anyways, pics.

Ok, no pics lol. Phone's server is acting goofy. Need to get ready for work and will try again in a bit.

Sent from my LGL55C using Tapatalk 2

 

[pdib]

I think they would be out of sync. Do they go off at the same time? Might even drain the battery faster.

That's what I said, Jimi D. But Jerms insisted . . . . . so I tried. Here's my first (apologies, I already posted this in another thread, but I want to collate info)

This here is a micro DgDc with 28g and 30g Kanthal; coming in at 0.5Ω

I included some burst (rapid shutter) photos to show how its lighting up.














It's a very smooth and flavorful vape. Actually, been tucking away at it most of today, and I'm about to outfit my other REO the same way. Good Stuff!!

 

[pdib]

What I find interesting about this, (in my mixed up brain) is it relates (i think) to this coil shape business. It seems the micro style already flouts convention re: leg length and vape intensity. Does it also laugh in the face of our rules about dual coils? Where will it end? If it is, indeed, inductance at play here, I'd love to learn more.

Hopefully "gotalotgoingon" will throw in his pics, variations. I know he was trying it concurrent w/ but separate from Jerms.

 

[Jerms]

I think they would be out of sync. Do they go off at the same time? Might even drain the battery faster.

Surprisingly enough, they do start off equally with a fairly even glow. Touching wraps I'm sure has a part in it, since they feed heat off each other. We'll see bigger differences I'm sure with a bigger gap in wire size. Drains the battery at the same rate as any set-up with the same resistance. Here's my first, the 30 and 31ga Kanthal DgDc on an IGO-L.











Sent from my LGL55C using Tapatalk 2

 

[pdib]

Mine turned white, ↑yours grew hair.

 

[Jerms]

What I find interesting about this, (in my mixed up brain) is it relates (i think) to this coil shape business. It seems the micro style already flouts convention re: leg length and vape intensity. Does it also laugh in the face of our rules about dual coils? Where will it end? If it is, indeed, inductance at play here, I'd love to learn more.

Hopefully "gotalotgoingon" will throw in his pics, variations. I know he was trying it concurrent w/ but separate from Jerms.

Yep, the whys and the hows is a mystery to me as well. I have ideas, but don't know enough about electricity to know how much of a role, if any, they play.

I can only say for sure that it works, and it works well. More experimentation needed, but I also feel comfortable in saying it works at least as good as a dual wire coil with same gauge. The feel is a bit different, whether it's an improvement or not for me I can't say for sure yet.

Thanks to the mod who fixed my subject title!

Sent from my LGL55C using Tapatalk 2

 

[Cjax]

oh, great, just what I needed! Another technique for me to try out! Just when I get settled in to a nice routine, someone's gotta come along and rain their dag-blasted innovation all over my parade! At least Temco had a 2 month lead time on their 28g, so I've got some time before I'm staying up late at night testing out some dgdc coils on different mods and atties.

All sarcasm aside, nice work. If Micro coils broke the mold of convention by having the coils touch without shorting, this definitely takes that a step further.

 

[pdib]

ok, so I just did another one. basically same setup as above. If I took a picture, you'd be hard pressed to tell them apart. Haven't vaped it yet, but it fires evenly. Maybe a bit quicker, tho. Time will tell. This one is also 0.5Ω; but it is comprised of 28 & 32 Nichrome (resistance wise, that's like 27g and 31g Kanthal). So, a bigger spread in resistance. Gonna go wick it and vape it. Will report back, Capn' Jerms.







On a side note: it sho' is nice to have the two REOs, one to vape on while I play with the other. And they are getting along like two peas in a pod. Glad it didn't work out for ya', Newman! (as it gave me the impetus to rescue/buy it.)

 

[pdib]

Here's how I'm going to describe this.


If you had a sound mixing board (ok?), and there were ten pots on it (ok?), #1 being the volume for the bassiest tones and #10 being the trebliest (ok?), and they were all set to 5 (mid volume setting); take pots #2 and #9, and turn them up to 7.

There you go.

 

[pdib]

Or this. . . . .

You know how when you cross your fingers far enough and then use the crook between them to stroke the bridge of your nose, and it feels like you've got two noses?


There you go.

 

[grainey1968]

Or this. . . . .

You know how when you cross your fingers far enough and then use the crook between them to stroke the bridge of your nose, and it feels like you've got two noses?


There you go.

Pdid - you are as mad as a bucket of spiders!!!
But, just imagine the numbers of ECF members around the world who will be trying the 'two noses' phenomenon!!

 

[pdib]

Well, grainey, this bucket of spiders is starting to think that the whole dual coil (dual wick) knowledge base is like grandma's recipe; where you always cut the end off the doo-dad before you put it in the oven, and later it turns out she did that cause she had a short pan.

We always advise that dual wick dual coils be of exact same length wire; because the current will favor the lower resistance path. But, everybody was always building DC of same gauge wire. These DgDc coils are about as close as you can get to same LENGTH wire. Maybe all along, it was just about wire length, and not resistance. After all, we talk about wire gauge and resistance in the inverse alot of the time. Yeah, of course it's higher "resistance", its thinner. Less traffic. Maybe the current is concerned with the SHORTEST path, not the WIDEST* path!!!!!

SOMEBODY whose setting up a dual coil (dual wick), try using different gauges, PLEASE. Be extra sure about wire LENGTH, tho. Let's see what we get.








*lowest resistance

 

[pdib]

Oh, wait. I'm probably stating the obvious! OOPS
















(Oh, no, I'm in the public library and I'm naked!!!!! BAD DREAM!)

 

[darkzero]

Surprisingly enough, they do start off equally with a fairly even glow. Touching wraps I'm sure has a part in it, since they feed heat off each other. We'll see bigger differences I'm sure with a bigger gap in wire size. Drains the battery at the same rate as any set-up with the same resistance. Here's my first, the 30 and 31ga Kanthal DgDc on an IGO-L.

I would have to agree that I also think that the coils touching each other is making it work due to heat transfer. If the two guages were considerably spread apart it probably wouldn't work as well but who knows. Anyone want to try?

As long as the overall resistance is the same as a single guage coil, battery life wouldn't be any different. The battery is not smart enough to know the difference.

 

[Statistic]

I'm game, brb

 

[Statistic]

Well, that was interesting

I haven't vaped it yet. It's two coils, 30 and 32g kanthal a-1

I didn't count the wraps but the lengths of wire are exactly the same length. Resistance is 1.6ohm

The coils heat up at EXACTLY the same time...

Uploading a video of them heating to youtube now.. it's taking foreeeeeeever

 

[Statistic]

The 32g cools faster but they seem to heat up at the same time, at least from cold.

This is on the VAMO at 4.5v

 

[darkzero]

Interesting. Thanks for trying and so late in the night. Did you happen to measure the resistance of each coil individually? I wonder how it vapes? Can't view the video, comes up as private for me.