Wire gauge and ohms?

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edyle

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use steam engine
Coil wrapping | Steam Engine | free vaping calculators

you can plug in 1 ohm, and change the gauge and see what happens to wraps and heat flux.

or you can plug in wattage because you might have a certain mod and want to choose a wattage suitable for that mod, then put in the ohms and gauge till the flame icon goes green (about 200 mW/mm2)
 

Jreese37

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When I first started building coils, I got 32g, 28g, and 26g wire. I can nearly build to about any resistance I can use on almost any regulated mod I've ever had. My preference is between 1.5ohms down to .4 ohms. Bearing in mind that I've built for myself and that I'm just an average vaper. It also depends on what you want to build on.

Will you be building on an RDA or a RTA? And what specific device you'll be building on is important too. I can offer a little more advice when I know that.
 

sonicbomb

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In a nutshell, if you want a cooler higher resistance build you will need a thinner higher guage wire. If you want a hotter lower resistance build you will need thicker lower guage wire.

The three little bears I have in my rotation as of now are:

26 gauge single coil at 0.78 oms ~ coolish morning vape
24 guage dual coil at 0.4 ohms ~ when the nicotine craving kicks in proper and the lungs are ready
22 guage dual coil at 0.21 ohms ~ when I'm ready to blow a plume or thirty
 

JaneinMesa

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I just want to rebuild my protank coils to work with my new Kamry V2 mod. I've been rebuilding my protank coils with 28 gauge nichrome wire and have been vaping at 3.3-3.4 volts on my Vamo for a couple years. Now everything is watts (I've read several articles and I'm still not getting it.) My new Kamry only goes down to 4.1V and that that is too hot. But when I change to watts and vape at 7.0 - 7.4 it's ok.

What do I change when building coils so they don't get too hot? I know I can add a couple wraps to the coil to increase ohms. Should I use thinner gauge wire or thicker? Why is the lowest setting of 7 watts ok, but the lowest setting on volts (4.1) is too hot? What am I not getting? Increase watts or voltage will make the coils hotter, right?
 

edyle

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I just want to rebuild my protank coils to work with my new Kamry V2 mod. I've been rebuilding my protank coils with 28 gauge nichrome wire and have been vaping at 3.3-3.4 volts on my Vamo for a couple years. Now everything is watts (I've read several articles and I'm still not getting it.) My new Kamry only goes down to 4.1V and that that is too hot. But when I change to watts and vape at 7.0 - 7.4 it's ok.

What do I change when building coils so they don't get too hot? I know I can add a couple wraps to the coil to increase ohms. Should I use thinner gauge wire or thicker? Why is the lowest setting of 7 watts ok, but the lowest setting on volts (4.1) is too hot? What am I not getting? Increase watts or voltage will make the coils hotter, right?

yes try add a wrap, but nowadays instead of rebuilding protank coils you can get the subtank mini and use the rebuildable heads instead of dealing with the little silicone/rubber grommets on those old protank coils; plus you won't have to worry about liquid getting down in your 510 thread connector.
 

Two_Bears

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I just want to rebuild my protank coils to work with my new Kamry V2 mod. I've been rebuilding my protank coils with 28 gauge nichrome wire and have been vaping at 3.3-3.4 volts on my Vamo for a couple years. Now everything is watts (I've read several articles and I'm still not getting it.) My new Kamry only goes down to 4.1V and that that is too hot. But when I change to watts and vape at 7.0 - 7.4 it's ok.

What do I change when building coils so they don't get too hot? I know I can add a couple wraps to the coil to increase ohms. Should I use thinner gauge wire or thicker? Why is the lowest setting of 7 watts ok, but the lowest setting on volts (4.1) is too hot? What am I not getting? Increase watts or voltage will make the coils hotter, right?

Either go to a thinner wire or add two or three more wraps.

I don't use nicrome.

With a 2 mm coil of 7 wraps of 28 gauge kanthal I get .93-1.02 ohms.
 

JaneinMesa

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Thanks Everyone!

So I want a lower ohm coil, not a higher ohm!?! I was thinking I needed higher ohms to avoid the burning. Arghhh.

edyle: The problem with the tanks I've seen is I can't just swap out a head if I'm leaving the house or take extra coils with me. I haven't shopped in quite a while so maybe there is something new out there.
 

Two_Bears

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Thanks Everyone!

So I want a lower ohm coil, not a higher ohm!?! I was thinking I needed higher ohms to avoid the burning. Arghhh.

edyle: The problem with the tanks I've seen is I can't just swap out a head if I'm leaving the house or take extra coils with me. I haven't shopped in quite a while so maybe there is something new out there.

There are three choices for lower ohm rating.

1. Thicker wire 26 gauge has lower ohm rating than 28 or 30 gauge.

2. Use fewer wraps ob the same gauge

3. Go to a smaller diameter coil with the same gauge wire

Be careful with going too los on resistance.

Either use a regulated mod that can handle the resistance. Most can deal with .3 or .2 ohm with no problem.

If you like a mech mod make sure the battery can handle a low ohm rating. Battery venting cab be scary. Get a good ohm calculator and read the specifics of your battery.
 

JaneinMesa

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Ok, figured it out. I think I'm screwed with my new mod. Nothing I do will make it burn less than 7 watts.

Volts squared / Resistance (in ohms) = Watts, so
3.4 squared/2.4 = 4.82 watts is what I am used to vaping

My new mod only goes down to 7 watts (was advertised VV down to 1.4, but won't go that low with a higher ohm coil). This is important for those who vape like I do. Very disappointing. I even shopped locally and no one even mentioned this when I told them what I was vaping. I need a mod that goes down to 3 watts NOT one with higher watts.

Can someone tell me how to do a calculation, when I am stuck with a minimum of 7 watts and the mod automatically figures the volts - what ohm coil do I want?

:(

 

JaneinMesa

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I wanted to keep vaping at 3.3-3.4 volts with my 2.4 ohm coils. So I bought the . . .
regulated Kamry V2:
  • Variable wattage from 7-30W(0.1 increment)
  • Variable voltage from 1.4-8V(0.1 increment) (* I didn't know that it won't go below 7 watts, so a 2.4ohm coil will not go below 4.1 volts; a 1.4 ohm coil is gets set to 3.1 volts)
  • Supports resistance atomizer: 0.3-10ohm
My juice tastes burnt, I get less vapor, it's just no good - too hot. I'm not sure what to change - the mod? or the coils (use thicker wire with shorter length/fewer wraps)?

(32 gauge wire would be thinner than what I've been using.)
 

mhertz

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I don't know the kamry, but i'm guessing that when you have a mod with a minimum wattage in vw mode, and which cannot step down, then when wanting a lower wattage than that, then you change to vv mode and build a coil which gives that lower wattage without the mod needing to step down, if it even can that... So if 2.4 ohms is too much(7.35w if the mod uses "4.2v config" i.e. there are single and dual batt mods and in series or parallel...), then try a 3 ohm build by using either more wraps, or higher gauge wire, or higher inner diameter, which for a "4.2v config" mod, is 5.88v, and you can go higher in ohms if wanted, to get even lesser watts, but it will have a higher ramp-up time though...

If the mod really has a 7w minimum power output, even in vv mode, and not just in vw mode, then sorry, you're screwed then... But again, if it hasen't, then you're only bet is to highten the ohms in vv mode...
 
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