IPV D2 announced.

[Croak]

The problem with dual coils is that you can achieve a working setup if you match each coil one another, as close as possible (same geometry and resistance), but they don't last as long as single, which, as singles do not endure too much, it's a real PITA.

Even if you get a theoretically perfect dual assembly, then you wick it leading to a ruined symmetry. Always one gets different by chance, because the wick is really different, or you slightly modified the geometry as you passed in the cotton. Then they run in parallel but not as equals, and sooner or later one of them gets hotter than the other.......and hell breakes loose.

And if you inadvertently dry your setup, just once, the TC-enabled chip works like a charm, yeah, but the setup got ruined because one of the coils always gets nearer a burnt status and the flavour is lost.

So, for the time being, single will do. Not so big problem.

All true, IF you're only using Ni200. With titanium and its increased strength, there's almost no issues with the coils deforming, and titanium is very durable, lasting a long time (single or dual).

The rest is up to technique and consistency in your building and wicking, and to a certain extent, your choice of atomizer. Master those and choose the right atomizer, and you can get good, reliable results with dual coil TC builds, even Ni200 (though it's quite a bit more difficult than using titanium).

 

[scaredmice]

I'm eager to switch to titanium builds.....such a tantalising metal!

But some postman has it, I'm just lurking my mailbox!.....

 

[Scotticus93]

I've had good luck with duals in my Velocity, in Kanthal, Ni200 and titanium. The Velocity has a LOT of room though, which makes good dual nickel builds possible.

With Ni200 duals, I run 28 gauge, 10 spaced wraps each, comes out to just under 0.08 ohms, 3 or 3.5mm ID, and usually run them at 40J/480F with 80%+ VG juice. I've tried 30AWG but the stuff is a pain to work with and vapor production and flavor suffers, even with a lot of wraps to get good surface area. 26AWG, when you build it with enough surface area (8 wraps or more), just takes too long to ramp up, even at 50J.

Titanium, 26 gauge, 3mm 6/7 spaced wraps each, around 0.16 ohms, run it at 32J/480F and like it better than Ni200 for ease of building, durability, better battery life, and it matches Ni200 in vapor and flavor production. It really blows 28AWG Ni200 out of the water with dual 8/9 wraps (~0.2 ohms), but with the 50J limit of the D2, ramp up time suffers too much, so 6/7 is a good compromise.

Yeah that's what I'm thinking is the ramp up time thing is suffering. And eventually I'll need a device that does more than 50w in temp mode. I was using 28g ni200 and will revisit. It was my fault for not making identical coils lol. I'm just not a very good builder at spaced coils yet. It's hard to get both sides to have the same spacing

 

[KenD]

Yeah that's what I'm thinking is the ramp up time thing is suffering. And eventually I'll need a device that does more than 50w in temp mode. I was using 28g ni200 and will revisit. It was my fault for not making identical coils lol. I'm just not a very good builder at spaced coils yet. It's hard to get both sides to have the same spacing

Build on machine screws. It's so much easier to get (near) identical perfectly spaced coils.

Sent from my C6903 using Tapatalk

 

[Scotticus93]

Build on machine screws. It's so much easier to get (near) identical perfectly spaced coils.

Sent from my C6903 using Tapatalk

Thanks for the tips. I also heard you can wrap two coils on the same bit but basically parallel to each other and do it thet way but I like your way better. Yeah on my last build. It was the same wraps but one had much smaller spacing than the other. Or noticeable anyway. Is that what messed me up?

 

[KenD]

Thanks for the tips. I also heard you can wrap two coils on the same bit but basically parallel to each other and do it thet way but I like your way better.

I've never tried that as it seems much more work than wrapping on a machine screw.

Yeah on my last build. It was the same wraps but one had much smaller spacing than the other. Or noticeable anyway. Is that what messed me up?

Resistance is dependent on the length of wire used and it's fully possible that there's some difference in that length with coils spaced differently. Using machine screws I've never had problems with dual coils either with nickel or titanium (except trying to fit large enough dual nickels), and that's considering that I sometimes had difficulties with uneven kanthal duals.

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[Scotticus93]

I've never tried that as it seems much more work than wrapping on a machine screw.



Resistance is dependent on the length of wire used and it's fully possible that there's some difference in that length with coils spaced differently. Using machine screws I've never had problems with dual coils either with nickel or titanium (except trying to fit large enough dual nickels), and that's considering that I sometimes had difficulties with uneven kanthal duals.

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I guess we could run sleeper coils right? But it's my understanding you need a three post atty for that which I don't have any. And two 10 wrap. 28g nickel around 3mm screwdriver gives me around .55 to .6 ohms. So it works plus I've found the sweet spot for nickel or have heard it's anything under .1 ohms

 

[KenD]

I guess we could run sleeper coils right? But it's my understanding you need a three post atty for that which I don't have any. And two 10 wrap. 28g nickel around 3mm screwdriver gives me around .55 to .6 ohms. So it works plus I've found the sweet spot for nickel or have heard it's anything under .1 ohms

I've never wrapped a sleeper, but I'd think that it'd be difficult to get even coils as the second one needs to be wrapped on the atty.

You mean .055-.06 right? Because .55-.6 is way more than dual 10 wraps of 28 ga ni200 should be. As I was limited to .1 on my first tc mods I had to use 30 ga, and around 2.5 mm at most (on RTAs, I don't like RDAs much).

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[crxess]

I foresee a serious issue with Perfectionist Vapors relying on Perfect technology to deliver that perfect Vape. Like possibly missing a much better vape on the assumption the numbers didn't mesh so it can't happen.

Once this guy was so deep in theoretical study........he was run over by a truck. Once in a while you just have to stop an look around.

 

[dDubs]

How long does it take nickel coil heads to cool down?! Every time I replace the battery in my D2 you have to re lock the resistance, and it seems like it takes forever to get back down to .2 where it should be. I've even put the coil head in my AC vent in my truck and it still reads .4.

 

[AmandaD]

How long does it take nickel coil heads to cool down?! Every time I replace the battery in my D2 you have to re lock the resistance, and it seems like it takes forever to get back down to .2 where it should be. I've even put the coil head in my AC vent in my truck and it still reads .4.

You don't have to relock the resistance once it's set - do you? Does it lose it when you change the battery (I hadn't noticed that if it's true)?

 

[Croak]

You don't need to relock the resistance, it's saved in non-volatile memory just like your temp/watts/joules/coil material settings.

 

[dDubs]

You don't need to relock the resistance, it's saved in non-volatile memory just like your temp/watts/joules/coil material settings.

Huh, it is? After I replace the battery the joules setting stays the same but resistance shows zero. I don't think I've tried just firing it, so if I did it should just work?

 

[TheotherSteveS]

Huh, it is? After I replace the battery the joules setting stays the same but resistance shows zero. I don't think I've tried just firing it, so if I did it should just work?

yup!

 

[Croak]

Huh, it is? After I replace the battery the joules setting stays the same but resistance shows zero. I don't think I've tried just firing it, so if I did it should just work?

That's because the resistance shown on the main display screen is live resistance, not locked. Worst thing Yihi did with the SX-130H is having that confusing resistance display.

 

[BigEgo]

That's because the resistance shown on the main display screen is live resistance, not locked. Worst thing Yihi did with the SX-130H is having that confusing resistance display.

I don't mind the real-time resistance reading, but I HATE not being able to see what my locked resistance is without having to set it again.

 

[Scotticus93]

Ok so I'm just gonna stick to running single coils. I found a screw but somehow I lost my entire spool of nickel wire. I can't find it in my room and it's not like it's even a mess?! Idk. I just wrapped a 24g kanthal single that worked good. I'm gonna stick to single. Can a parallel single coil work? I used to use those. Will that work with coil or is there too much contact? I bet I could space them.

 

[Scotticus93]

I found an airhead flavor tho. Rocking it single coil .8 ohms 8 wraps on 3mm with 24g in a royal hunter at 40w. I was doing decent with nickel but sometimes I lose a little faith in temp control. Especially since I can't dry burn my coils. That part really irks me. I don't think it's a gimmick but idk if it's for me. I'm gonna buy Nichrome here eventually.

 

[Croak]

Parallel contact Kanthal will work, but you need at least 5 wraps per wire on a 3mm rod to get above the ohm limit, and it's going to have a loooooooooooooooooooooooooooooooooong ramp up time.

 

[BigEgo]

Parallel contact Kanthal will work, but you need at least 5 wraps per wire on a 3mm rod to get above the ohm limit, and it's going to have a loooooooooooooooooooooooooooooooooong ramp up time.

Nah. It wont be that loooooooooooooooooooooooooooooooooong. It will be pretty loooooooooooooooooooooooooong, just not as loooooooooooooooooooooooooooooooooong as you think.