Subtank RBA builds? show em!

[MacTechVpr]

It's all about finding a balance.

In order for the larger inner diameter coil to have the same resistance as a smaller one it would either have to have less wraps, or thicker gauge wire (possibly a combination of the 2). The larger inner diameter coil would likely mean that there is more wire to heat up, meaning that you'd probably have to run it at a higher wattage to get the same kind of temperature as the smaller coil. But, the larger coil would also probably have more surface area, meaning that more juice is available to be heated up. So the trick is to find the sweet spot between fast heat up, heat emitted, and surface area.

Resistance itself is pretty much an irrelevant number on regulated mods

A rather excellent and elegant explanation Theo. You obviously understand something about the mechanics. Congratulations on quitting. I would like to personally invite you to make one of these….

Tehnsioned Contact Micro Coil, MacTechVpr

• MacTechVpr
• Jun 25, 2015
• coil contact tensioned

The geometric advantages may be obvious to you. Perhaps not the functional electrical as its not merely a matter of form. There is such a thing as optimal and having this under your belt will get you there. Repeatable precision in 30 seconds.

Good luck.

So like a microcoil being a product of both form and function, so is adhesion not merely a matter of closest proximity but dependent upon the balance of strain.

Protank MicroCoil Discussion!! | E-Cigarette Forum
Tensioned Micro Coils. The next step. | E-Cigarette Forum

 

[TheoS]

Hmm, seems like I can't view that album yet

 

[TheoS]

Hmm, seems like I can't view that album yet

 

[MacTechVpr]

slm" data-source="post: 17357432" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch">

Question... Assuming equal resistance, what would generally be thought of as a better... A small inner diameter coil or a larger one?

All too often the convo on vapor gets reduced to merely a discussion of power (and coil size). It's is definitely about balance as @Theo$ said. You want to achieve a balance of power (wetted and non-wetted coil surface area), air and juice flow necessary for the vapor density (in time) that you enjoy. That balance will by necessity be guided by the requirements of the atomizer and the limits or optimal performance zone of the mod…or your vape will suck. Variables do have sweet spots affected by poor resistance choices and less than optimal coil geometry.

Good luck SLM.

 

[SLM]

Thanks guys. I was thinking about it mainly from a wicking standpoint I guess. A larger inner dia coil would "hold" more wick and have more surface area. The same could be accomplished with more wraps of a lower resistance wire at the smaller diameter.

I've been doing 2mm coils, mainly three strands of 30g Kanthal tightly twisted in a drill. 4 wraps is .44 and 5 is .51 ohms according to my iPV4s.

So many things to play with!

 

[MacTechVpr]

Thanks guys. I was thinking about it mainly from a wicking standpoint I guess. A larger inner dia coil would "hold" more wick and have more surface area. The same could be accomplished with more wraps of a lower resistance wire at the smaller diameter.

I've been doing 2mm coils, mainly three strands of 30g Kanthal tightly twisted in a drill. 4 wraps is .44 and 5 is .51 ohms according to my iPV4s.

So many things to play with!

Agreed. I'm in the more wick is better camp. Try to figure what the max is the atty will support as a starting point. That pretty much tells you or gets you to highway speeds. You can always slow down but you can't go any further if your design is a rev limiter. Once you choose a wick media and the best diameter for it in the atty then it becomes a best surface area for that spec discussion.

Tensioned Micro Coil, Subtank Mni Base

• MacTechVpr
• Nov 11, 2015
• mactechvpr microcoil tensioned

25x7 @2.7778 mm = 0.805Ω 22.9W (5.2A) 170 mW/mm²

The tools at Steam Engine main page | Steam Engine | free vaping calculators are indispensable for that, for example, a Subtank RBA deck build I'm vapin' right now...25/7/7 3.175mmØ LL=9mm t.m.c. @ 0.883Ω (t.m.c. = tensioned microcoil).

Good luck SLM.

 

[SLM]

Thanks! I'm kind of enjoying wrapping different coils just for fun! I need to remember I made three different mandrils to wrap on. I have a 2, 2.5 and 3. I always grab the 2. :-\

This may be a bit OT here but is the idea to keep the heat flux low?

 

[MacTechVpr]

Heat flux is the measure of thermal output. What's good is the level of warmth you enjoy. That gets the max out of the juices you like. Some are really full cool. Many require warmth like tobacco. But not too hot or you mute flavors. Usually the accents.

I enjoy a range roughly between 150-200 mW/mm² although I do go a bit lower and sometimes considerably higher. Generally towards the higher with 18650's, lower with 18490 mech's. With variables I go for the highest capacity I can handle and is best for the chip. See Mod range | Steam Engine | free vaping calculators.

I'd suggest building (and bookmarking) some variations labelled as I have with some of the parameters like Ø, turns, etc. so you can compare them side by side. Choose the wattage input your most likely to enjoy in each one to force the mW/mm² calculation. I use the output wattage at 4.2v at the wound resistance for mechs. It'll be different for each wind. For variables, I use my maximum target wattage at the usually optimal resistance for the box. You'll start to get a sense of what you can expect after you build a few using this approach. And also to learn to match as best as possible the output of your mechs to what your getting out of your variables.

There ya go. Have at it, and good luck!



p.s. Calc your total thermal output vs total surface area of your wind/s. However…consider always that it's wetted contact surface that delivers the energy. Aspect ratio of the wire can send more of it out to air diffusing the vape (not vaporization). Even more so for multi wire. This means you're going to require more power and need to design the build for it. Why I recommend a properly oxidized contact coil for beginners so they can appreciate what an efficient wind can deliver.

 

[SLM]

Wow, thanks for all the great information! There's a ton to learn!

 

[kismetcapitan]

unfortunately I didn't take pictures, but I did do a 45min youtube tutorial

I'm pretty sure that few, if any, are wicking the Kanger RBA the way I am...but it's the only wicking method that I've tried that doesn't either flood or give me dry hits.

 

[Pocha]

Nice Ducati wraps!

 

[kinzey23]

ok its a little tricky to fit it in but triple twisted 26 awg kanthal 5 wraps around a 2.5mm screwdriver and wicked with 4mm wide organic ... coton, amazing clouds and amazing flavour, single coil, runs at 0.25 ohm and I used nicely at 50 watts, mech mod says 53.2 watts
but can literally run it up to 80 watts
but 40watts is not enough. needs at least 45 watts
when fitting takes some wiggling and squeezing to get it to 1) fit without touching anything 2) heat evenly.
5 mins fiddling with it and its great. tried the stock coils after and they just are not enough. if you want it to fit easily use 4 wraps but I cannot vouch for the maths/science of ohms la on this one

 

[ShoeTer McGavin]

Sup y'all?!

New to the site... Been messing with some pre rolled Claptons- and trying to find my perfect harmony. Loads of info in this thread, thanks to all you Vets, and it's much appreciated!

I'm wondering what everyone who is running the claptons preferences are? Amount of wraps, diameter, distance from deck, and what the desired results are when manipulating those variables.

I'm looking for clouds, full of flavor, around a medium heat. I did a 5 wrap clap around .7ohms and it was a little hot for my liking... Dropped to three wraps @.48ohms but now my clouds arent as dense- although temp is better.

I'm getting some minor popping from time to time, and a sizzle after I let go of the fire button which is peculiar, so I'm going to try to build a coil closer to the deck a little bit and see how she blows.

Not quite at the shameless-brag-pic-posting stage yet, but enjoyed seeing all of yours!

Vape On!!

 

[ShoeTer McGavin]

Is there a way to input claptons on the Steam Engine calculator??

 

[Zunyr]

Sup y'all?!

New to the site... Been messing with some pre rolled Claptons- and trying to find my perfect harmony. Loads of info in this thread, thanks to all you Vets, and it's much appreciated!

I'm wondering what everyone who is running the claptons preferences are? Amount of wraps, diameter, distance from deck, and what the desired results are when manipulating those variables.

I'm looking for clouds, full of flavor, around a medium heat. I did a 5 wrap clap around .7ohms and it was a little hot for my liking... Dropped to three wraps @.48ohms but now my clouds arent as dense- although temp is better.

I'm getting some minor popping from time to time, and a sizzle after I let go of the fire button which is peculiar, so I'm going to try to build a coil closer to the deck a little bit and see how she blows.

Not quite at the shameless-brag-pic-posting stage yet, but enjoyed seeing all of yours!

Vape On!!

Long time lurker here. The sizzle at the end is residual heat in your coil after you finish your drag. If you watch you Clapton when you do initial setting you'll see it takes a second to cool, so, take an extra second to drag after firing to cool the coil.

At least that's how I've learned how to deal with that problem.

Popping from my understanding is basically hot spots on your coil getting quenched by new influx of juice to that spot. Wicking well should help resolve that. As far as spacing goes, I just started building Clapton's last week and after having bounced around the single coil realm and two pieces of wire wrapped into one coil, the best I can give you for spacing is 2-3 mm above the bottom air hole and centered. I like to use a piece of wire to adjust my wicks after wetting to ensure I can get good flow all around the coil, so I free up the sides of the terminals, my wicks end up looking like a fan blade at the juice holes and then tunnel through the coil.

My Clapton's are 32 over 26 (can't get a 32/24 combo to fit underneath the set screws), gave the fiance a 3 wrap and stuck a 4 wrap in mine, both vape the same, but I've taught her to watch voltage and wattage at the same time, cause ultimately that's controlling the heat, and thus, the vape. I think I'm just babbling in my sleepy state at this point, but there might be something helpful in that info.

 

[OhTheAgony]

Do you guys mind if Toptank owners post here too or is there a separate thread for that one?

I just made my first coil & was hoping for some feedback.

I did ten and a bit wraps in 26g grade 1 titanium (comes in @0,4ohm) but I can't really get it spaced out evenly (the ti wire is very springy), I know it is far from pretty but will this be a problem in use?

My first mod will arrive tomorrow so I'm just trying to get everything ready so I can start vaping as soon as it gets here

I think I'll order some 28g too so I can do with a few less wraps for the same resistance, ten seems a little much for the little Kanger RBA.

 

[MacTechVpr]

Do you guys mind if Toptank owners post here too or is there a separate thread for that one?

I just made my first coil & was hoping for some feedback.

I did ten and a bit wraps in 26g grade 1 titanium (comes in @0,4ohm) but I can't really get it spaced out evenly (the ti wire is very springy), I know it is far from pretty but will this be a problem in use?

My first mod will arrive tomorrow so I'm just trying to get everything ready so I can start vaping as soon as it gets here

I think I'll order some 28g too so I can do with a few less wraps for the same resistance, ten seems a little much for the little Kanger RBA.

More wraps will actually give you more wetted contact surface. The right wind geometry will max out the power and wick you can fit in the space...Subtank RBA builds? show em! | Page 21 | E-Cigarette Forum.

Tehnsioned Contact Micro Coil, MacTechVpr

• MacTechVpr
• Jun 25, 2015
• coil contact tensioned

For all the fundamentals from the basic to advanced on dialing in a precision repeatable baseline build see my posts here and on...

Protank MicroCoil Discussion!!
Tensioned Micro Coils. The next step.

Give a shout when you have the tools and are ready. Glad to help.

Good luck.

 

[OhTheAgony]

More wraps will actually give you more wetted contact surface. The right wind geometry will max out the power and wick you can fit in the space...Subtank RBA builds? show em! | Page 21 | E-Cigarette Forum.

Tehnsioned Contact Micro Coil, MacTechVpr

• MacTechVpr
• Jun 25, 2015
• coil contact tensioned

For all the fundamentals from the basic to advanced on dialing in a precision repeatable baseline build see my posts here and on...

Protank MicroCoil Discussion!!
Tensioned Micro Coils. The next step.

Give a shout when you have the tools and are ready. Glad to help.

Good luck.

Thanks for the thorough reply!

So you're basically saying it should work, but not as good as a perfectly even coil?

 

[MacTechVpr]

C

Thanks for the thorough reply!

So you're basically saying it should work, but not as good as a perfectly even coil?

Correct, symmetry and balanced strain are both elements of a stable wind. Start to get that and you'll have predictability and consistency. All winds have them, even yours. It's a matter of degree. I introduced tension winding as a simple method to wind with precision. Come on, even kids do hoop rings. It's not reinventing the wheel. But it's in important adaptation here because it gets us where we want to go right quick and reliably. In the case of the simple hand wind think it through…temperatures will vary on that wind end-to-end. You may not have perfect contact with your wick if the turn diameters don't match, for example. Both are factors that if off will send resistance skyward and sour the taste of the vape. So yeah, takes a few days of practice and typically about a dozen winds or so. But it's all joy thereafter.

Good luck and tag us if you need. Good luck.

 

[OhTheAgony]

C


Correct symmetry and balanced strain are both elements of a stable wind. Start to get that and you'll have predictability and consistency. All winds have them, even yours. It's a matter of degree. I introduced tension winding as a simple method to wind with precision. Come on, even kids do hoop rings. It's not reinventing the wheel. But it's in important adaptation here because it gets us where we want to go right quick and reliably. In the case of the simple hand wind think it through…temperatures will vary on that wind end-to-end. You may not have perfect contact with your wick if the turn diameters don't match, for example. Both are factors that if off will send resistance skyward and sour the taste of the vape. So yeah, takes a few days of practice and typically about a dozen winds or so. But it's all joy thereafter.

Good luck and tag us if you need. Good luck.

I think I'm starting to get it now, I guess I'll be going through this role of wire a lot quicker then I initially expected. I better order some more then just in case

I'll get my feet wet & report back after I played around with it a bit.

Thanks for the insights