First Attempt on Custom Coil

[Vidurr]

Hi everyone. Hoping someone will walk me through this. I'm still learning here. Up until now I've just been recreating the first coil that was built for me.

I'm shooting for 1 to .8 ohm.
I'm building on a Tobh Atty using a Copper Mutant. Battery: 26650 (3.7 v) 3500 mAh.
My other coils were with 20g kanthal. This one I'm going to be using 18g kanthal.

I have the ohms law calculator but like I said I don't know what I'm doing. I also have vape boss.

I tried a 5/6 wrap duel coil and it's reading at 0.12 ohm and I was told not to go below 0.5.

Can anyone help? I'm really in need of a vape. Lol

 

[Vidurr]

I forgot to add that the battery is 32A continuous and 64A pulse.

 

[Vidurr]

Okay. I think I've got this. Each gauge has a specific resistance per mm. When running dual coils you take the ohm of the length you've coiled and cut it in half. Then divide the voltage of your battery by that and make sure the result isn't higher than your batteries continuous amperage.

Any mistakes?

If I have this right I just need to know the resistance of 18 AWG A1. Which I've been searching for and I'm not finding it.
Does anyone know?

 

[martinelias]

Use thinner wires if you want higher resistance. If dual youre at .12 each of those are .24 at 6 wraps that about .04 per wrap if you want .8 you need a shit ton of wraps to get that on a single coil (20 wraps). Dual coiling cuts resistance in half. For a .5 you need about 12-13 wraps. Ramp up time will be ridiculous.

 

[Vidurr]

You're telling me. I just made a single coil. It's sitting at .53. Tons of cloud from that one long coil but you're right the ramp up is suck.

I found the ohm per foot and calculated that down to mm. It looks like I can run 2 31 mm coils with no issue. I'm sure this will make the wait even longer but I will finally be taking my first step towards cloud chasing. ....or venting my battery if I have any of this wrong. lol

 

[Vidurr]

BTW, thanks for replying. I was beginning to think I signed up at the wrong place. Lol

I think I'm going to like this if it works. I was worried it would be way hot and unpleasant going sub ohm to .5 or below but I actually prefer .53 to my former 1 to .8.
Have you tried going below .5 ohm martinelias?

 

[martinelias]

You're telling me. I just made a single coil. It's sitting at .53. Tons of cloud from that one long coil but you're right the ramp up is suck.

I found the ohm per foot and calculated that down to mm. It looks like I can run 2 31 mm coils with no issue. I'm sure this will make the wait even longer but I will finally be taking my first step towards cloud chasing. ....or venting my battery if I have any of this wrong. lol

Figure it out before you start experimenting, you could fuck yourself up.
I never got too into the whole ohms per ft or mm jive. Just build and check resistance. Inspect your build on ohm meter before wicking, tamper with it some, get personal with it. Only after you locked in your desired build should you proceed. Slow ramp up time requires you to press the fire button longer which adds unecessary stress to battery. Using thinner wire will get you the same result in less wraps thus speeding up ram up time.

 

[martinelias]

BTW, thanks for replying. I was beginning to think I signed up at the wrong place. Lol

I think I'm going to like this if it works. I was worried it would be way hot and unpleasant going sub ohm to .5 or below but I actually prefer .53 to my former 1 to .8.
Have you tried going below .5 ohm martinelias?

Yes i usually build .1 to .2 but ive the necessary equipment to do so safely.

 

[Vidurr]

What equipment is that?

 

[Vidurr]

I'm adding your advice about stress on the battery to my note book here. I suppose it's good I was going by the continuous rather than the higher pulse amps.

 

[Vidurr]

I'll try a smaller gauge Monday when the stores open. Right now I'm stuck with this.

 

[martinelias]

Most important is vtc4 batteries which can handle 30a continuous on a mech which gives me a possible .16 run on a single cell. I use the hexohm v2 mostly which has a 20a chip but i can use lower resistances than the recommended .3 since i cant turn up the voltage on it anyway without burning my throat.
You should always go by continuous.

 

[OBDave]

What battery are you using that's providing those specs? I'm not as well-versed in the 26650 world as 18650, but I know there are a lot of suspect cells out there at any size...

18g is mammoth wire - I used to build bicycle wheels with 15g spokes, you're not far from there. You'll probably need at least 24g to get your resistance up - I've got some 22g but I only use it for lazy-man low builds, and I still find the ramp time crap.

Basic advice: use that ohm's law calculator and don't use more than 80% or so of your battery's continuous rating, especially if, as you've stated, you don't know what you're doing. Get some thinner wire, and even then you'll want to add some wraps.

Longer advice: check out my comprehensive (but needing a few updates) noob thread here:

http://www.vapingunderground.com/th...-sick-clouds-bro-thread-sticky-edition.78126/

It's not everything you need to know, but it answers a handful of your questions and suggests some others that you ought to be asking before begging low sub-ohm builds on a mechanical...

 

[KaptainStache]

As an added safety measure. NEVER rely on the pulse rating. Also, think of it like swimming: don't just jump into the deep end until you understand how to swim. Vape on