Dual coil cartos vs single coil/

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Baditude

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When I started using cartos I used dual coil until I started getting bad tastes. I been single coil ever since.
I had the same experience, in particular a frequent burnt taste despite the carto appearing to wick well. In fact I wrote a short editorial of single coil vs dual coil in my blog. I have a personal theory:

Cartomizer Anatomy.jpg cutaway diagram of a cartomizer

Using the above graphic as an aid, imagine another coil (the 2nd of a dual coil) about midway up the shaft of the carto. As we vape the suction pulls juice from both the tank and the top of the filler in the carto. Over time, unless you top off the carto frequently (who does that?), the top and possibly the mid portion of the filler is going to become dry from the suction. That upper coil is going to be exposed to dry filler and can burn it and the wick sock it is enclosed in, resulting in a burnt taste.

In comparison you wouldn't ordinarily have that happen with a single coil carto because you have the one lone coil down by the punched hole which is always bathed in juice.

That's just the amateur scientist in me...;)

disected-cartomizer -1.jpgdisected-cartomizer -2.jpgdisected-cartomizer-3.jpgdisected-cartomizer-4.jpg

dissected dual coil cartomizer
 
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wv2win

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I only use 1.5 ohm dual coil cartos now and they do a great job of providing warmer and fuller vapor. But if you have a weak model PV with a small 2.5 amp switch regulator then you won't get the benefit of the dual coils. You need a PV with at least a 3.5 amp switch.

They work great on the VAMO which has a 5 amp switch.
 

wv2win

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I had the same experience, in particular a frequent burnt taste despite the carto appearing to wick well. In fact I wrote a short editorial of single coil vs dual coil in my blog. I have a personal theory:

View attachment 187764 cutaway diagram of a cartomizer

Using the above graphic as an aid, imagine another coil (the 2nd of a dual coil) about midway up the shaft of the carto. As we vape the suction pulls juice from both the tank and the top of the filler in the carto. Over time, unless you top off the carto frequently (who does that?), the top and possibly the mid portion of the filler is going to become dry from the suction. That upper coil is going to be exposed to dry filler and can burn it and the wick sock it is enclosed in, resulting in a burnt taste.

You wouldn't ordinarily have that happen with a single coil carto because you have the one lone coil down by the punched hole which is always bathed in juice.

That's just the amateur scientist in me...;)

View attachment 187782View attachment 187784View attachment 187785View attachment 187787

dissected dual coil cartomizer

I think this makes good sense. I use dual coil tank cartos so I think that keeps the entire carto moist eliminating dry hits. Although when I used regular dual coil cartos, I always used the clear ones so I knew when to top off and again avoided the burning of the poly problem.
 

Qball

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On my VAMO at 5-5.3 volts it just seems to not hit as good as my single coil ones and has some lag time heating the coil. I am a newbie so that may be something to do with it. I havent found exaclty what i want yet but have a vamo with carto tanks and i seem to enjoy for now.

How do you use a carto without a tank? i have had the worst experience with them vaping without a tank.
 

SoberSnyper

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Dual coils won't work on some VV devices. The unit will read the resistance as one coil and trigger amp limiting.

It will trigger amp limiting on some devices but it is not reading the resistance of one coil. It is reading the resistance of the circuit, a parallel DC circuit. Dual coil cartos use two coils in parallel, so essentially the effective resistance of the circuit is half the value of the resistance of the coils.
 

SoberSnyper

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I just know from experience with a LT clone. It read it as 1.5 instead of 3.0 which made for a very, very weak vape.

In this case you had a 1.5 ohm dual coil carto, which is two 3 ohm coils in parallel and with a LT with a 2.5 amp limit the max voltage you can apply is 3.75 volts before you amp limit kicks in. 2.5 amps X 1.5 ohms = 3.75 volts. So if you set your LT to 4 volts, it will only apply 3.7 volts.
 

SoberSnyper

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The dual coil I had was supposed to be 3.0. Being dual coil, it had two coils with resistance of 1.5 each. My device was treating it like a 1.5 and keeping the voltage set far too low for what was really a 3.0 ohm carto. If yours is vaping well, then your device doesn't have a problem with it. That's good.

The device was treating it like 1.5 ohms because that is the effective resistance with two 3 ohm coils in parallel. If you had a 3 ohm dual carto, that means you would have two 6 ohm coils in parallel. The largest ohm value I have seen with dual coils is 2.5 ohm, which means it is two 5 ohm coils in parallel.
 

wv2win

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On my VAMO at 5-5.3 volts it just seems to not hit as good as my single coil ones and has some lag time heating the coil. I am a newbie so that may be something to do with it. I havent found exaclty what i want yet but have a vamo with carto tanks and i seem to enjoy for now.

How do you use a carto without a tank? i have had the worst experience with them vaping without a tank.

It seems you are using the VAMO in the "volts" - no1 setting which is part of the problem right there, since you are reading volts. You need to switch to the variable wattage mode or no2 to use dual coil cartos most effectively IMO. I use 1.5 ohm dual coils on the VAMO at 12 or 12.5 watts and get nice warm vapor and no burning at all. The VAMO is perfectly set up to get the full potential out of dual coil cartos because it is Power Regulated (VW) and has a 5 amp switch regulator. Just switch to the no2 mode, try 12 watts and see how that works.
 
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rebgold

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I started with the clearomizer that came with my ego-K, one leaked and the other made my juice taste burnt even if I cleaned it with vodka every day. Switched to 1.7 ohm single coil Boge cartos. Some work well and some dont. Never had any luck cleaning them. I have one juice that is thick and it tastes burnt almost right away.
I was advised by a helpful member here to stick with single coil because dual coil with run down your battery quickly. I had just ordered some Smoketech dual coils when I got the advice, lol. I have to say that I am liking them better than the Boge single coil. My battery is lasting all day and my juice tastes good, no filler, no over heating.
 
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