Newbie jumping into the deep end, have questions.

[chiliphil1]

Hey guys,I was able to obtain a new set up today. I am getting it used so the price was excellent. It's a K100 mech mod with a dual coil rba on top, right now I am not sure of the brand.

I need to ask 2 things, 1. Does anyone have a link to a video or article showing how to rebuild these dual coil models? I have seen one with a single coil and am confident with that but the only dual coil stuff I can find is for adding dual coils to a single coil atty. 2. I think I have already asked this, but I want to ask again to make sure I KNOW what I'm doing. Considering that this is a mech mod I know that there is no protection, so a boo boo can mean a boom boom, so here is my understanding, if I am wrong, PLEASE correct me.

When using a mech, you have to figure the resistance of the coil x the voltage of the battery to determine the average draw. I plan to wind these coils to 1.2-1.5 ohm, not looking to get into sub ohm, with that said, figuring that I would have a 1.2ohm coil, a freshly charged battery of 4.2v then I would draw 3.5a @ 14.7w, so as long as my battery's amp drain is above that then I am ok, right?

Also, since you cannot regulate the wattage output on the mech, how does it adjust.. Is it that ohm's law in relation to voltage and wattage will vary the wattage output based on the current voltage of the battery?

Again, I am asking this because I want to be sure that I am safe and will never have an issue. I also wonder, with it being dual coil would you wind each coil to half of your desired resistance? One other question, what happens if a coil wire breaks? How likely is it for that to happen?

Sorry for the redundancy of my posting, I was asking before to gain knowledge but now I am asking because this is going to become a reality.

Here are some pics

Thank you again for any help, this forum has been amazing thus far.

 

[State O' Flux]

When using a mech, you have to figure the resistance of the coil x the voltage of the battery to determine the average draw. I plan to wind these coils to 1.2-1.5 ohm, not looking to get into sub ohm, with that said, figuring that I would have a 1.2ohm coil, a freshly charged battery of 4.2v then I would draw 3.5a @ 14.7w, so as long as my battery's amp drain is above that then I am ok, right?
Actually, it's voltage divided by resistance to arrive at current value.

Also, since you cannot regulate the wattage output on the mech, how does it adjust.. Is it that ohm's law in relation to voltage and wattage will vary the wattage output based on the current voltage of the battery?
Correct... however, mech users tend to ignore wattage. Continuous current drain is all that really matters... and pulse drain if you are comfortable with that variable.

Again, I am asking this because I want to be sure that I am safe and will never have an issue. I also wonder, with it being dual coil would you wind each coil to half of your desired resistance? One other question, what happens if a coil wire breaks? How likely is it for that to happen?

With dual coils, the net resistance is 1/2 the resistance of one coil. Or... with two 1.0Ω coils in parallel, net resistance is 0.5Ω.

If the coil breaks (something I've never had happen in practice), you have an open. If, in the highly unlikely event that the negative end touches ground, you have an intermittent short to ground, with an unknown resistance value.

 

[roxynoodle]

Yes, if you want a 1.2ohm build, make each coil 2.4ohm. Wrap them identical but in opposite directions (they are a mirror image of each other).

 

[ElConquistador]

As for how do you adjust...you don't. Your initial build will determine the wattage. The minute you start vaping, the battery voltage starts dropping, and so does the wattage.

I will reiterate what roxynoodle said above just to make sure you read it. For a 1.2 ohm dual coil build you need two identical 2.4 ohm coils.

 

[roosterado]

I did a Seach on YouTube typed in Dual Coil atomizers build. About 30-40 came up at least 4-5 showed how to build a dual coil aroud 1 ohm. The others that were for sub ohm[if it was about building the atty you have or close to it could be adjusted to your desired OHM range by changing gauge of wire,diameter of coil,the number of wraps. Steam Engine has a good online coil calculator. Vape Safe!

 

[dw117]

When using a mech, you have to figure the resistance of the coil x the voltage of the battery to determine the average draw. I plan to wind these coils to 1.2-1.5 ohm, not looking to get into sub ohm, with that said, figuring that I would have a 1.2ohm coil, a freshly charged battery of 4.2v then I would draw 3.5a @ 14.7w, so as long as my battery's amp drain is above that then I am ok, right?

Also, since you cannot regulate the wattage output on the mech, how does it adjust.. Is it that ohm's law in relation to voltage and wattage will vary the wattage output based on the current voltage of the battery?

Again, I am asking this because I want to be sure that I am safe and will never have an issue. I also wonder, with it being dual coil would you wind each coil to half of your desired resistance? One other question, what happens if a coil wire breaks? How likely is it for that to happen?

Hi and welcome to the joys of rebuilding. Sounds like you're going about this the right way by doing your research and checking with others that it's ok, which I think is important and good for the community.

First of all. Are you measuring the resistance of your coils? I ask as you didn't mention actually measuring them, just that you planned to make them 1.2-1.5 ohm. If you haven't get a multimeter or a 510 ohm checker and check the resistance for every build you do. This will help you work out if you're doing it safely and also check for shorts.

Now assuming you have successfully made a 1.2 ohm coil. You are correct a freshly charged battery will put out 4.2 volts and that draws 3.5A. You are also correct that as long as your battery's continuous amp limit is above the current that setup will draw then you're good to go. What batteries are you using out of curiosity? I use this site to check my current and wattage etc:

Ohm's Law Calculator

I think others have said this but it's worth saying again. Your freshly charged battery will give you 4.2V and this will decrease as you deplete the battery, so on a mechanical your wattage will reduce over time. Depends on your battery slightly but don't over deplete your battery. Check the voltage it's putting out after a while with a multimeter or similar, and charge it before it drops below a certain amount. The voltage to stop at varies depending on who you ask. Personally I don't ever go below 3.5V, but some sources will say lower, I'm just being conservative. Also as this decreases the power you're getting decreases and you'll notice it in the vape.

Dual coils give you a resistance roughly half of a single coil of the same type, so for a dual coil wind each coil to double your desired resistance. This website helps with coil builds:

Coil wrapping | Steam Engine | free vaping calculators

As for coils breaking, well I've not had it happen during vaping (only setup) and from the sounds of it your desired resistance is a sensible place to start and shouldn't stress the wire too much, but as someone mentioned if it does happen you're in danger of shorting, however if your coil has cotton below it if it snapped and fell that might help. It isn't something I've experienced though and to be honest not something that I personally worry about if i've made the coils and set them in the RDA fine.

 

[chiliphil1]

Hi and welcome to the joys of rebuilding. Sounds like you're going about this the right way by doing your research and checking with others that it's ok, which I think is important and good for the community.

First of all. Are you measuring the resistance of your coils? I ask as you didn't mention actually measuring them, just that you planned to make them 1.2-1.5 ohm. If you haven't get a multimeter or a 510 ohm checker and check the resistance for every build you do. This will help you work out if you're doing it safely and also check for shorts.

Now assuming you have successfully made a 1.2 ohm coil. You are correct a freshly charged battery will put out 4.2 volts and that draws 3.5A. You are also correct that as long as your battery's continuous amp limit is above the current that setup will draw then you're good to go. What batteries are you using out of curiosity? I use this site to check my current and wattage etc:

Ohm's Law Calculator

I think others have said this but it's worth saying again. Your freshly charged battery will give you 4.2V and this will decrease as you deplete the battery, so on a mechanical your wattage will reduce over time. Depends on your battery slightly but don't over deplete your battery. Check the voltage it's putting out after a while with a multimeter or similar, and charge it before it drops below a certain amount. The voltage to stop at varies depending on who you ask. Personally I don't ever go below 3.5V, but some sources will say lower, I'm just being conservative. Also as this decreases the power you're getting decreases and you'll notice it in the vape.

Dual coils give you a resistance roughly half of a single coil of the same type, so for a dual coil wind each coil to double your desired resistance. This website helps with coil builds:

Coil wrapping | Steam Engine | free vaping calculators

As for coils breaking, well I've not had it happen during vaping (only setup) and from the sounds of it your desired resistance is a sensible place to start and shouldn't stress the wire too much, but as someone mentioned if it does happen you're in danger of shorting, however if your coil has cotton below it if it snapped and fell that might help. It isn't something I've experienced though and to be honest not something that I personally worry about if i've made the coils and set them in the RDA fine.

Thank you for your reply. As far as your questions, I don't know yet. I ordered the device and am still waiting on it to arrive. I will be checking the coil before I use it if it already has one made, if it does not then I will certainly check it before I install my own ones. I will use a multi-meter at first and when I can I will get an ohm reader. The batteries, again I do not know, it is coming with 2 batteries and a charger but I do not know the brand of either. My plan is to get some AW IMR 18650 1600mah ASAP. I chose the 1600 because it has an C15 rating which makes it 24A. I will also be purchasing an intelicore smart charger as well. I also do plan to use cotton for my wick, so I guess that will give a layer of insulation and protection, silica, ceramic, mesh, etc don't really appeal to me at this stage, cotton just seems like it will be easier to work with starting out.

The replies have made me think of 2 more questions, if you guys don't mind. 1. What happens if there is a variance between the coils? Say 1 coil is 2.2 ohm and the other is 2.1? I realize they need to be the same, but what happens if they are not exact? 2. This may qualify for dumbest question ever asked, but is it absolutely necessary to have 2 coils in this setup? From the pic it has 2 negative posts and one central positive, do you have to put a coil on both sides like in the picture or can you just put one coil in?

Thank you all again for the help.

 

[ElConquistador]

If the coils don't match, one of them will heat up quicker than the other, it will be obvious. I usually build the two coils, then kind of hold them up next to each other to make sure they're the same. Don't know about your atomizer, but yes, you can wrap a single coil, but you'll probably want to plug up the hole on the side of the atomizer that doesn't have a coil in front of it.

Good choice on batteries (AW), I've never seen a bad thing about them as long as they're genuine. Definitely look into a meter that you can screw your atty onto to check, it's also a perfect platform for building coils.

I can tell you've done your research and you're not just jumping into this willy-nilly like many do.

 

[ElConquistador]

And I'm no expert on dual coils, I just got my first dual coil atomizer a week or two ago, but I've been building coils for over a year with no catastropies (yet).

 

[dw117]

Thank you for your reply. As far as your questions, I don't know yet. I ordered the device and am still waiting on it to arrive. I will be checking the coil before I use it if it already has one made, if it does not then I will certainly check it before I install my own ones. I will use a multi-meter at first and when I can I will get an ohm reader. The batteries, again I do not know, it is coming with 2 batteries and a charger but I do not know the brand of either. My plan is to get some AW IMR 18650 1600mah ASAP. I chose the 1600 because it has an C15 rating which makes it 24A. I will also be purchasing an intelicore smart charger as well. I also do plan to use cotton for my wick, so I guess that will give a layer of insulation and protection, silica, ceramic, mesh, etc don't really appeal to me at this stage, cotton just seems like it will be easier to work with starting out.

The replies have made me think of 2 more questions, if you guys don't mind. 1. What happens if there is a variance between the coils? Say 1 coil is 2.2 ohm and the other is 2.1? I realize they need to be the same, but what happens if they are not exact? 2. This may qualify for dumbest question ever asked, but is it absolutely necessary to have 2 coils in this setup? From the pic it has 2 negative posts and one central positive, do you have to put a coil on both sides like in the picture or can you just put one coil in?

Thank you all again for the help.

As ElConquistador correctly says (just thought I'd add weight to it):

Different coils will heat up unevenly in dual coil mode, I don't think it matters much if they are not identical to 0.01 ohm or anything. I just make them the same no. of wraps around the same screwdriver or drill bit or whatever and just check they look about the same. Try and keep the distance of wire between the posts and the coil the same for each as well, although I wouldn't worry about a couple mm difference.

You can put one coil in, and it will work fine (leaving one of the negative posts free of wire) but the quality of the vape will depend on whether the airflow can be adjusted to suit a single coil, i.e. a single hole on the side next to the coil.

AW batteries are excellent, although there are other good brands, just avoid anything with "fire" in the name haha. Nitecore intellichargers or whatever they are called are also excellent. When you get the batteries and charger it comes with just check what they are and how reputable they are (you could always post here to say), but if not great they will probably tide you over until you get some better ones. a 3.5A draw that we've been discussing should be fine on most batteries.

Cotton is easy to work with so you'll be good to start off there. I've moved on to using rayon but it functions very similarly to cotton.

 

[chiliphil1]

Thank you all for your replies. Looks like the guy selling it backed out on me because he got a higher offer for it

I will however be getting myself an RBA ASAP, though I will probably go regulated, again, thank you all for the help. Now I know what to do when the time comes.

 

[Cman1337]

What mechanical mod and RDA were you buying? What kind of mod and RDA are you looking for? Do you like lots of vapor? Do you prefer flavor? There are some very good prices right now for authentic mechanical mods and RDAs.

 

[chiliphil1]

It was a k100 with whatever RBA comes with it. I am honestly not sure what it was, I found it on a site that uses a credit exchange system (long story) all I would have had to pay was $5.00 so I was going to get it and research it once I had it, I figured for the price I couldn't go wrong. As far as what I am looking for, I really don't know I am still experimenting. I know I would like good flavor and lots of vapor, but the big thing is throat hit. I find that the pre built ones are too unreliable, I am not 100% in the market for a mech, I am more looking for a regulated BUT with the price I was going to pay for this, I couldn't pass it up.

I know there are some good prices out there right now but my money is practically nil, so I am going to have to wait a while.. Hopefully once things are back to normal around here I can get the svoemesto I've had my eye on (kayfun lite with samovar) My first purchase whenever I can get around to it will probably be an iTaste MPV 2 and either a nautilus or a kayfun clone. I am thinking I want to stick with a box mod and pre built for my all the time vape for their long battery life and ease of use. The RBA and high end, or even mech will be more for my "at home" vape.

In addition I am just wanting an RBA because it looks fun to rebuild the coils and the ability to venture into different resistances for different experiences seems very appealing to me.

 

[Cman1337]

Just like the pre build coils are unreliable, so are the box mods like the MPV 2. They make box mods that take batteries that will push out anywhere from 30-250 Watts, which will be much more than maximum 12 watts on the MPV 2. If you want to power an RBA, you are going to need some firepower. MPV2 may be a let down. Especially if you are tight on money, you don't want to waste $60 on itaste MPV 2 when you can spend roughly the same price for a legitimate box that is regulated with a higher end board inside and removable batteries.

Just my opinion i am sure someone else will chime in as well. good luck!

 

[chiliphil1]

Just like the pre build coils are unreliable, so are the box mods like the MPV 2. They make box mods that take batteries that will push out anywhere from 30-250 Watts, which will be much more than maximum 12 watts on the MPV 2. If you want to power an RBA, you are going to need some firepower. MPV2 may be a let down. Especially if you are tight on money, you don't want to waste $60 on itaste MPV 2 when you can spend roughly the same price for a legitimate box that is regulated with a higher end board inside and removable batteries.

Just my opinion i am sure someone else will chime in as well. good luck!

Ok, what would you recommend? The only reason that I was looking at the mpv was because the girl at the cape shop uses one and says she likes it.

I was thinking the mpv would match ok with the nautilus, is that wrong?

When the time comes for an RBA I was going to go with a better mod.

 

[ElConquistador]

Lots of people around here love their MPV 2's and recommend them. I don't think you would be disappointed with one, it should power a Kayfun type tank just fine.