Ohms, RM2's, and All that

[2buildawall]

I have been reading a lot of threads about the RM2, flavor, clouds, and sub ohm builds.

So I went and quasi edumacated myself about ohm's law and how to not blow my head off. Basically I am an electrical idiot but a ok with the next step idiot.

I use the gizmo to make my coils and with 6-7 turns I get a nice 1.0 ohm coil with good consistency. Well I am ready to try my very first .7-.9 sub ohm build but still need help.

1) Using the art gizmo how do I get to lower ohms with the 28g Kanthal?

2) Can I get crazy and run dual coils on the RM2?

3) Does it make that big a difference dropping from 1.0 to say .7 ohms?

I can't believe I am asking these questions but I am tired of reading threads on builds and yada. You all are interesting folks but my goodness a person only has 24 hrs in the day. Besides I am impatient!

So this has been discussed ad nauseam. I am just not getting how to do it. I am a picture person so please if at all possible post a picture. Monkey see type of thing. I currently have 28g kanthal but can get whatever I need. So bring it Reonauts. Help me please you are my only hope.

 

[Papa_Lazarou]

Short and dirty version...

1) Fewer turns - try 6-7 wraps to get in the .8 ohm range.

2) Not advisable - far better atties to do that with, plus you should prolly get used to building singles of all kinds first.

3) It can make a big difference - depends on the juice, the atty, the wick, AFC (or not), etc. Best to just try it out and see what you think.

4) (unlisted) Why, yes, you should make sure you have covered off all the safety protocols such as appropriate batteries and a good ohm checker.

Basically, play around (within safety) and make that bad boy atty and coil yours to do with as you please. You'll find your sweet spot in there somewhere - it's subjective. You'll also hit some rough vapes while playing - do not be deterred. Keep calm and twist on.

 

[ancient puffer]

I have been reading a lot of threads about the RM2, flavor, clouds, and sub ohm builds.

So I went and quasi edumacated myself about ohm's law and how to not blow my head off. Basically I am an electrical idiot but a ok with the next step idiot.

I use the gizmo to make my coils and with 6-7 turns I get a nice 1.0 ohm coil with good consistency. Well I am ready to try my very first .7-.9 sub ohm build but still need help.

1) Using the art gizmo how do I get to lower ohms with the 28g Kanthal?
Less wraps = lower ohms.
2) Can I get crazy and run dual coils on the RM2?
Yes, but remember 2 things, dual coils come out to HALF the resistance of each, i.e., 2 ONE ohm coils=.5 ohms. Also, it may be tricky trying to fit 2 wires through each hole.
3) Does it make that big a difference dropping from 1.0 to say .7 ohms?
Yes it does. I find I can vape anywhere from 1.6-1.9, but 1.5 and lower is too hot for my tastes.
I can't believe I am asking these questions but I am tired of reading threads on builds and yada. You all are interesting folks but my goodness a person only has 24 hrs in the day. Besides I am impatient!

So this has been discussed ad nauseam. I am just not getting how to do it. I am a picture person so please if at all possible post a picture. Monkey see type of thing. I currently have 28g kanthal but can get whatever I need. So bring it Reonauts. Help me please you are my only hope.

As I mentioned above, fewer wraps=lower resistance(ohms). If you decide to go with dual coils, try to get them exactly the same as each other. Also note that as you go lower, you may need to open up the air intake hole to cool it down. And that's a one-way street.

This sheet may give you some idea of how many wraps for the resistance you want. Hope that helps

ETA: Dang, Papa, you ARE quick on the trigger

 

[Susan~S]

Here are a few links for you regarding building coils and getting the resistance just where you want it:
1. Steam Engine
2. Coil Toy Calculator

Make sure to check your build with an ohm reader or DMM BEFORE putting it on your REO (or any mod) and firing it.

Sorry I don't know how to explain this with pictures. Regarding batteries, ohms law and why the amp rating is important here's a blog by Baditude: Ohm's Law Calculations

 

[K31Scout]

Ancient puffer, Do your 1.8ohm coils deliver as good a flavor as a warm 1.0hm coil? I'm a week into the RM2 and have built one coil so far at 0.9ohms. It is much warmer than my clearomizers but is not something that bothers me and the flavor is top notch.

What I want is decent flavor and the longer battery life for some of my 12 hour days. Would a 1.8ohm coil draw less power than a 1.0ohm coil? I'm an electrical novice myself.

 

[Filthy-Beast]

Yeap everything they said.

When you go duals, to get the best from them, you need to have the coils exactly the same or one will heat up faster and take most of the work load. when I say the same this also means the legs are same length from coil to post on both coils.

Getting them the same is tricky in an RM2 because the post are not centered and there is less space on one side. You also want air flow on both coils, so with an RM2 this means drilling a 2nd hole or building both coils on one side which is a lot trickier.

Yes there will be a noticeable difference between a .7 and 1 ohm coil. At .7 your pushing over 25 watts vs. the 17.6 of a 1 ohm coil. Some juice I prefer at .9 some at 1.3 ohms. Now mixing science(ohms law, coil design and placement) with art(juice blend) to your personal taste. Enjoy the process of experimenting instead of getting frustrated by it.

Stay above .3 ohms and you should have no sagging of the Reos spring. If you make sure there are no shorts with an ohm meter and stay under 70 percent of max continuous amp load of your battery, you'll be operating safely. An AW IMR 1600 mah battery has max continuous amp load of 24 amps. 70% is 19.2 amps. Ohms law will tell you at 4.2 volts with a 19.2 amp load = a .22 ohm coil.

 

[Filthy-Beast]

Ancient puffer, Do your 1.8ohm coils deliver as good a flavor as a warm 1.0hm coil? I'm a week into the RM2 and have built one coil so far at 0.9ohms. It is much warmer than my clearomizers but is not something that bothers me and the flavor is top notch.

What I want is decent flavor and the longer battery life for some of my 12 hour days. Would a 1.8ohm coil draw less power than a 1.0ohm coil? I'm an electrical novice myself.

Yes it will draw less power, flavor is a personal thing. I'd say try a 1.2 or 1.3 ohm coil and see if you like it better or worse before going all the way to 1.8. Just going to 1.3 will reduce the draw on the battery by 1 amp.

 

[JC Okie]

Ancient puffer, Do your 1.8ohm coils deliver as good a flavor as a warm 1.0hm coil? I'm a week into the RM2 and have built one coil so far at 0.9ohms. It is much warmer than my clearomizers but is not something that bothers me and the flavor is top notch.

What I want is decent flavor and the longer battery life for some of my 12 hour days. Would a 1.8ohm coil draw less power than a 1.0ohm coil? I'm an electrical novice myself.[/]

........never mind.......

 

[2buildawall]

Ah, good stuff so far!!! Thanking you!

Papa, what other types of single coils? I will build and try them all. I have done ugly, spaced out, minimal spaces, uglier, pretty darn tight, all 1.0+ ohm, and that is it. I have never done the mystical butterfly, bent 4.2 ohm, severed arm, broken neck, arthritic hip, or any such coils as of yet. Oh I almost forgot several actual single coil builds I saw the stove top and chimney.

To clarify a bit, I wick with sterile cotton (but am willing and ready to try other material), and run AW IMR 18650 1600mah batteries. I am using my MVP 2 as an ohm tester but now I need to buy a good ohm meter as the MVP will not read below .9 ohms.

Back to my balance sheet! Ciao!

 

[ancient puffer]

K31Scout,
Just to give you an idea of battery life, I vape at 1.8 ohms, using an AW IMR 18650, 1600 mAH, 24 mg nic. (I mention the nic level, because I find I vape less juice at higher nic levels, at 24mg, I vape about 3.5-4ml per 24 hours). My battery was sitting at 3.6v this morning when I switched to a fresh battery. It started yesterday at 4.16ish volts. So I, indeed, get a full day of vaping at 1.8 ohms....easily.

I'd have answered your other questions but as usual, FB was way ahead of me.

(Note: here, a "full day" is given to mean 9:00 am to 9:00 am, with 6ish hours sleep somewhere in there)

 

[K31Scout]

I used to vape 3 mls a day but I'm so in love with the Reo I'm shockingly over 6 mls a day. I know I'll cut back after a while but learning the squonk is another reason to puff away. I'll tie a few coils this week to test vape quality.

 

[K31Scout]

I am using my MVP 2 as an ohm tester but now I need to buy a good ohm meter as the MVP will not read below .9 ohms.

Back to my balance sheet! Ciao!

I have an MVP2 and it will read my RM4 dual coil at 0.5ohm. I haven't try to vape with it but it does read it My VTR will read it too. Maybe the original version MVP won't read that low.

 

[mogium]

I said the same thing. Still over 6 mls a day but i've dropped nic down to 1 mg/ml

 

[BockinBboy]

Ah, good stuff so far!!! Thanking you!

Papa, what other types of single coils? I will build and try them all. I have done ugly, spaced out, minimal spaces, uglier, pretty darn tight, all 1.0+ ohm, and that is it. I have never done the mystical butterfly, bent 4.2 ohm, severed arm, broken neck, arthritic hip, or any such coils as of yet. Oh I almost forgot several actual single coil builds I saw the stove top and chimney.

To clarify a bit, I wick with sterile cotton (but am willing and ready to try other material), and run AW IMR 18650 1600mah batteries. I am using my MVP 2 as an ohm tester but now I need to buy a good ohm meter as the MVP will not read below .9 ohms.

Back to my balance sheet! Ciao!

If you would like to try an easy 'dual' coil for the RM2, try a parallel coil. It looks like a single coil, but most assuredly has a dual coil punch. ... And, it's really no harder to make than a single coil, just wrap two wires parallel to each other at the same time, without crossing them over one another - no worries about longer legs than the other and so forth, because the two coils are together and in line with each other.

A Twisted wire coils is another option but has the added step of twisting the wires (usually done with a drill).

Just check out a YouTube vid on them and give it a shot. Just remember that using two wires will half your resistance, and check your work with a meter.

- Bboy

 

[diamondlou]

give a single parallel on 3/32 or 5/64 a shot (i like 3/32 as doesnt dry as fast) around 6wrap 3/32 or 8 on 5/64

 

[Raynman]

I see that someone beat me to it but it took a long time to get to it. Twisted coil is very nice way to go dual coils without all the hassle of trying to get each coil the same as the other. It also seems to have more wire exposed to the juice, making more vapor. YMMV

 

[2buildawall]

I will research how to build the single parallel coils and twisted coils and give them a try. Sounds interesting.

I must say I am now happily vaping at .8 ohms with 5 wraps of 28g Kanthal at about 1/16. My MVP2 did work as an ohm reader at .8. Cool beans and a little $$ saved.

Good stuff and thank you for the ideas!