Parallel vs Twisted coils

[kail461]

I've been watching videos on how to make these and how good is their performance but never really saw a vs topic on this since the logic on both these coils is the same: two wires of the same gauge wrapped together.
Also another question... How can the resistente in these coils be calculated through online/app coil building programs? Do they act like a wire of double the inicial diameter, dual coils or none of these? I am asking this because I do not own an ohm meter and my multimeter isn't working properly and it isn't possible for me to spend any more in vaping hardware at the moment.

 

[Baditude]

Resistance (Ohm rating) is determined by the mass and length of the wire. It doesn't matter if it is twisted, the mass and length is the same. Parallel wires are essentially two wires, so double the mass and length of a single wire (which increases the resistance).

Using two 1.0 ohm coils together in an atomizer results in a 0.5 ohm overall dual coil build. This is Ohm's Law.

I recommend not building or firing any new coils until you have an ohm reader. Never assume that so many wraps of a certain gauge wire will result in a particular resistance coil; there are too many variables, especially when sub-ohming.

 

[Robdogg1978]

Depends on wire size example twisted 26 would be like using 24 gauge wire so basically if you used a dual twisted coil if would ohm out almost identical to a dual coil of 22 gauge

 

[Mellowbuzz]

Depends on wire size example twisted 26 would be like using 24 gauge wire so basically if you used a dual twisted coil if would ohm out almost identical to a dual coil of 22 gauge

No.

Using twisted 26 is not like using 24. I think the poster before you (who happens to be this sites battery/safety guru) explained it perfectly and offered sound advice. The OP needs to invest in an ohm meter and be familiar with Ohms law before venturing into rebuilding.

 

[Robdogg1978]

Also like baditude said I wouldn't be delving into parallel or twisted or any other coil for that matter without a ohm meter a good ohm meter is cheap considering what could happen without one venting battery not a pretty sight

 

[Baditude]

IMHO, the fancy exotic coil builds are for enthusiasts and hobbyists. Simple microcoils (see MellowBuzz's avatar) perform just as well as the exotic builds. (At least I can't tell the difference).

KISS is my mantra - (Keep It Simple, Stupid)

Information Resources for Your First RBA

Explain it to the Noob: Ohms Law Calculators

 

[Shotglass]

IMHO, the fancy exotic coil builds are for enthusiasts and hobbyists. Simple microcoils perform just as well as the exotic builds. (At least I can't tell the difference).

I often rip apart my rig to try one of the 'exotics' but always come back to a simple dual microcoil.

 

[Das Auto]

it isn't possible for me to spend any more in vaping hardware at the moment.

Isn't this the Worst part about Vaping! Eventually, You have to Say, "Enough is Enough". Right?

 

[Baditude]

Isn't this the Worst part about Vaping! Eventually, You have to Say, "Enough is Enough". Right?

I haven't used any new gear in over a year. This is in part due to my financial circumstances, but I'm also perfectly happy with my two setups.

If we are fortunate to find a nice setup, its entirely possible to disregard G.A.S. (gear acquisition syndrome), and be perfectly happy with what we have. What is common is for this to become a hobby where we find we enjoy collecting gear.

• I have a Silver Bullet mechanical mod which is nearly 3 years old. The Patriot RDA on top is about a year old.
  
  
• I also have a Provari regulated mod which is also nearly 3 years old, with a year old Kayfun Lite Plus RTA on top.

For my vaping style, changing gear will not improve it. I have learned to fine tune what I already have.

Avoid impulse buys. Research...both here on ECF forums and also YouTube reviews. (I prefer PBusardo, but there are others.) Most new models of anything have "bugs" that later get squashed or improved upon - don't waste your money by being the manufacturer's Guinea pig.

 

[Robdogg1978]

Well i must have gear acquisition syndrome always buying and trying new things. Just got a reo grand with a bottom fed odin must say best vape I've ever had think I'll be content with this setup a while

 

[Shotglass]

it isn't possible for me to spend any more in vaping hardware at the moment.

Isn't this the Worst part about Vaping! Eventually, You have to Say, "Enough is Enough". Right?

Well i must have gear acquisition syndrome always buying and trying new things. Just got a reo grand with a bottom fed odin must say best vape I've ever had think I'll be content with this setup a while

IMO, one of the biggest misconceptions in vaping is the thought that one has to buy new gear to chase that "perfect vape" instead of learning to get that 'perfect vape' by tweaking the gear one already owns.

If we are fortunate to find a nice setup, its entirely possible to disregard G.A.S. (gear acquisition syndrome), and be perfectly happy with what we have.

 

[Completely Average]

IMHO, the fancy exotic coil builds are for enthusiasts and hobbyists. Simple microcoils (see MellowBuzz's avatar) perform just as well as the exotic builds. (At least I can't tell the difference).

Errr, aren't the coils in MellowBuzz's avatar twisted wire?

 

[K_Tech]

With parallel coils you are basically cutting the resistance in half. Twisted coils, it's not as cut and dried.

Let's say you have two strands of 28 gauge wire. 28 gauge Kanthal has a resistance of about 5.3 (5.27) ohms/foot. One 1 foot strand is 5.27 ohms. Two one foot strands (as in parallel) is half that, so 2.635 ohms, a little lower in resistance than the same length of 25 gauge (2.72 ohms/foot).

Now you start twisting. You'll notice that the length decreases, and how much it decreases depends on how much you twist it.

Assume that the length decreases by 3", or 25% of its original value. The resistance is still 2.635 ohms, but in a shorter length (9"). Extrapolate that to a foot, and you get 3.51 ohms/foot, which is slightly more than that of 26 gauge Kanthal (3.21 ohms/foot). Twist it an inch shorter or longer, and the numbers change.

You can calculate and predict coil resistance, but you have to be aware of what you're doing.

And as Baditude said:

I recommend not building or firing any new coils until you have an ohm reader. Never assume that so many wraps of a certain gauge wire will result in a particular resistance coil; there are too many variables, especially when sub-ohming.

I can't like this enough. I've said it before, I hate seeing the YouTube folks that wrap up a coil and fire it, usually saying something along the lines of "Oh, I've done this 7-wrap a thousand times, I know it's going to be around .3 ohms" and NEVER TEST THE RESISTANCE.

 

[Baditude]

Errr, aren't the coils in MellowBuzz's avatar twisted wire?

Yeah, upon a closer look at the pic, they are twisted wire. I guess I was "thinking" microcoil.

micro coil (loops compressed together so they touch each other)

 

[Completely Average]

Yeah, upon a closer look at the pic, they are twisted wire. I guess I was "thinking" microcoil.

No problem. I just happened to glance back up at his avatar when I read that and went "ummm".

But then again if I had to apologize for every mistake I've made we would be here all week.

 

[Mellowbuzz]

Yeah, upon a closer look at the pic, they are twisted wire. I guess I was "thinking" microcoil.

View attachment 425274 micro coil (loops compressed together so they touch each other)

It may be time for a check up with the eye doc!

I'm due also. I'm finding I have to hold coils further and further away to see them. I'm running out of arm length quick!

 

[K_Tech]

It may be time for a check up with the eye doc!

I'm due also. I'm finding I have to hold coils further and further away to see them. I'm running out of arm length quick!

May I be so bold as to suggest:

Magnifying lighted visor

They really are the bee's knees for up-close, detail work. Make my tired old eyes happy.

 

[Baditude]

May I be so bold as to suggest:

Magnifying lighted visor

They really are the bee's knees for up-close, detail work. Make my tired old eyes happy.

Yes, I use a "similar" setup for my tired old eyes when I build coils and rewick. I highly recommend.

 

[Mellowbuzz]

May I be so bold as to suggest:

Magnifying lighted visor

They really are the bee's knees for up-close, detail work. Make my tired old eyes happy.

Thanks for the link! Just ordered a pair. They should help tremendously

 

[juggler86]

I can't like this enough. I've said it before, I hate seeing the YouTube folks that wrap up a coil and fire it, usually saying something along the lines of "Oh, I've done this 7-wrap a thousand times, I know it's going to be around .3 ohms" and NEVER TEST THE RESISTANCE.

I never test on a ohm meter and never plan on it. I usually always do the same build and no my battery has atleast 4amp continueous wiggle. Nothing i could possibly do to my usual build could change the resistance enough to discharge 4more amps continuously. Even if it was possible i still have my pulse that is alot longer then my 2-4 second hits.

I use 50/50 regulated/mech and use steam engine and my build has never been a .1 over or under what SE said it would be.