How about 4 x 8 ohm coils

[edyle]

Instead of having 2 x 4 ohm coils, wouldn't it be better to have say 4 x 8 ohm coils?

Would arrange neatly with all four connected on a center post, and sticking out in 4 directions like a "+" sign to 4 return post.
More metal surface area for vaporising. More redundancy - poor or non-performance of 1 coil not so big an impact.

 

[JeremyR]

You'd be using 36/38 to get close to 8 which is so thin and hard to work with, it pops easy. Lower gauge like 32 your coils would be so long it would delay heat up time. You can do a quad coil if your battery can handle the load of. Lower resistance.
Below an ohm. The sweet spot for coil length is 8-12 wraps. It gets to a point where you have so much wire to heat it takes for ever To get to temp. Going nano size you can push length of coil farther but ohms are lower with the tiny coil diameter.

 

[edyle]

You'd be using 36/38 to get close to 8 which is so thin and hard to work with, it pops easy. Lower gauge like 32 your coils would be so long it would delay heat up time. You can do a quad coil if your battery can handle the load of. Lower resistance.
Below an ohm. The sweet spot for coil length is 8-12 wraps. It gets to a point where you have so much wire to heat it takes for ever To get to temp. Going nano size you can push length of coil farther but ohms are lower with the tiny coil diameter.

I don't hear dual coils taking longer to heat up so I wouldn't expect that with 4 coils.

What I do hear with dual coils is they vape juice faster.



Then again, the coils probably wont get as hot - a 'delayed heat up time' so to speak, but it would be more coil area heating up to a lower temperature.

The thing is, with the typical no rebuildables you have to use tiny coils therefore you have to have low resistances and you're going to get high temperatures, but with the typical big bulky rebuildables you HAVE THE SPACE to put BIG COILS ; should SHOULD be able to literally do a FIVE MINUTE DRY BURN of a big coil on a rebuildable without burning out the coil

 

[supertrunker]

The wattage is distributed evenly between the coils is my understanding and so you'd need some hefty batteries to get the same performance from them and use juice twice as fast as even duals.

I may be totally wrong ofc and if i am and it works really well in fact, then you just doubled my juice consumption and rebuild time!

T

 

[edyle]

The wattage is distributed evenly between the coils is my understanding and so you'd need some hefty batteries to get the same performance from them and use juice twice as fast as even duals.

I may be totally wrong ofc and if i am and it works really well in fact, then you just doubled my juice consumption and rebuild time!

T

Seems to me we're seeing more dual coil systems in clearomisers;

But those thingies are just too darn SMALL. If there's something to be gained from more coil (and I happen to believe the issue is metal surface area of contact) then the thing to do is put more coil on the rebuildables; so I was thinking to spread out the coils on the base either in a ring or in a cross.

Come to think of it, maybe a protank base could be designed like a kayfun?

 

[supertrunker]

Your problem there is that bigger coils use more wire than smaller ones and therefore have more resistance. Smaller coils use less and so heat faster, for the same thickness of wire.

Adding more wire by adding coils will do nothing to address the splitting of the power between them and that is why users of Egos do not run 4 coil atomisers, because the batteries cannot deal with the demand and because it is possible to get similar performance from say a microcoil at reasonable Ω.

Ill admit to squinting at some of the tiny nanocoils i see on here, but with a scanning electron microscope (read Amazon 10x binocular goggles) i see no reason to not be able to duplicate them.

T

 

[JeremyR]

It appears your shooting for 2 ohms and that is the problem with doing quad coils. The amount of wire, or size of wire, you need to actually reach 8 ohms/coil is gonna be hard to work with. Probably counter productive. I believe the dual coils in the aspire/ protank are probably 36 g wire.

Here's a simple breakdown of ohms per inch of wire
Kanthal A1 Wire resistance Chart

There are some people doing quad coil cloud chasers but they are usually around .3 ohms or lower.

But hey if you have the supplies to try it, give it a go.

 

[edyle]

Your problem there is that bigger coils use more wire than smaller ones and therefore have more resistance. Smaller coils use less and so heat faster, for the same thickness of wire.

Adding more wire by adding coils will do nothing to address the splitting of the power between them and that is why users of Egos do not run 4 coil atomisers, because the batteries cannot deal with the demand and because it is possible to get similar performance from say a microcoil at reasonable Ω.

Ill admit to squinting at some of the tiny nanocoils i see on here, but with a scanning electron microscope (read Amazon 10x binocular goggles) i see no reason to not be able to duplicate them.

T

bigger coils use more wire than smaller ones

Yeah; that is the point: MORE WIRE SURFACE AREA.

therefore have more resistance

Yeah; that's why you have 4 coils at 8 ohms which is electrically equal to 1 coil at 2 ohms.

Adding more wire by adding coils will do nothing to address the splitting of the power between them

Um, so I guess so many manufacturers must be silly making dual coils instead of just making single coils?

Why do so many rebuildables use 2 coils instead of only 1 ?

 

[edyle]

It appears your shooting for 2 ohms and that is the problem with doing quad coils. The amount of wire, or size of wire, you need to actually reach 8 ohms/coil is gonna be hard to work with. Probably counter productive. I believe the dual coils in the aspire/ protank are probably 36 g wire.

Here's a simple breakdown of ohms per inch of wire
Kanthal A1 Wire resistance Chart

There are some people doing quad coil cloud chasers but they are usually around .3 ohms or lower.

But hey if you have the supplies to try it, give it a go.

The amount of wire or size of wire to reach 8 ohm is too hard to work with for those tiny clearos; but an RBA would be perfect.
What becomes commonplace on RBAs can end up becoming factory made on the smaller units, if useful.

 

[BobC]

Yeah; that is the point: MORE WIRE SURFACE AREA.


Yeah; that's why you have 4 coils at 8 ohms which is electrically equal to 1 coil at 2 ohms.


Um, so I guess so many manufacturers must be silly making dual coils instead of just making single coils?

Why do so many rebuildables use 2 coils instead of only 1 ?

I think you're missing the point, what amperage do you think you need to drive 4 coils, do you think it's the same as 1 coil @ 2 ohms?

 

[edyle]

I think you're missing the point, what amperage do you think you need to drive 4 coils, do you think it's the same as 1 coil @ 2 ohms?

4 coils of 8 ohms each, in parallel, have an electrical resistance of 2 ohms.

They carry the same total current of 1 coil of 2 ohms.

They each carry 1/4 the current of 1 coil of 2 ohms.

 

[edyle]

bloog

looks like they have 808 stuff and recently started producing 510 stuff.

that atomizer head sure looks like the protank type head

 

[Mitey F]

Think about it this way. 4 8 ohm coils will have approximately 16 times the wire mass of a single 2 ohm coil. That means (in theory, obviously it will differ a bit in practice) it will take 16 times as long to heat a quad coil equaling 2 ohms. 16 TIMES. That's a HUGE heat lag, and as others have said, will be an ENORMOUS drain on a battery.

 

[classwife]

Moved to Rebuildable Atomizer Systems - Coil Builds from the Modding Forum - Atomizer Mods

 

[CloudZ]

Try it and let us know how it works out. You'll need ay least 5 watts per coil, so 20 watts. At 2 ohms overall, that's 6.3 volts. Good luck.

 

[MattyB1503]

hmmmmm, what, is, going, on here (???). Are you guys using some new pass-through or something, that plug into the wall?

Maybe some 6V jell cells?

4 and 8 ohms