What's the deal with sub-ohm?

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Oberon75

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Oct 26, 2014
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So are saying you couldn't have gone form smoking to vaping a year ago since we didn't have all the sub ohm crap?

My real worry is that with more exploding mods vaping will be severely regulated. And it's going to happen more and more since there isn't much in the way of warnings on the plug & play sub ohm crap.

I bought a Kanger eVod over a year ago and failed at vaping miserably. I went right back to smoking after struggling for a month.

9 months later I tried again with an MVP 2.0 but was a dual user until I bought my Atlantis an iPV 2S and eventually got into RDA's. I have to vape 12 to 18mg at 40 to 70 watts, not to smoke a cigarette. Not to mention the flavor is a whole lot better.

And for the record, we aren't seeing any tragedies from the high watt regulated devices people are using. It's more about mechs exploding and cheap eGo devices burning down homes. As these higher watt regulated mods from reputable companies become the norm, you have more people moving away from the dangerous devices.

With all the recent opinions around here from people judge things they know very little about, I think I'm coming to terms to the fact that ECF just might not be for me anymore.

Sent from my HTC One M8 Harman/Kardon edition
 

ReigntheGamer

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Oct 14, 2014
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I bought a Kanger eVod over a year ago and failed at vaping miserably. I went right back to smoking after struggling for a month.

9 months later I tried again with an MVP 2.0 but was a dual user until I bought my Atlantis an iPV 2S and eventually got into RDA's. I have to vape 12 to 18mg at 40 to 70 watts, not to smoke a cigarette. Not to mention the flavor is a whole lot better.

And for the record, we aren't seeing any tragedies from the high watt regulated devices people are using. It's more about mechs exploding and cheap eGo devices burning down homes. As these higher watt regulated mods from reputable companies become the norm, you have more people moving away from the dangerous devices.

With all the recent opinions around here from people judge things they know very little about, I think I'm coming to terms to the fact that ECF just might not be for me anymore.

Sent from my HTC One M8 Harman/Kardon edition

You and me both, and for the record I vape on a mech (Reo) everyday because I have taken the time to educated myself on how to do so safely. Does that mean I am immune to a freak accident? No. But it would be just that a freak accident.

And my story was similar to yours I started with cigalikes (still smoking), then on to egos with a Nautilus (still smoking but less than before) and then took my first puff on a Reo with a subohm dual coil and haven't touched a smoke since then. And I vape 65PG/35VG as an ADV so it's not about the clouds it's about what keeps me from smoking.

But by all means enjoy your stereotypes and the "quest" to prove you know what's best for me, it's not going to change the way I vape but it sure is going to show me a lot about the type of person you are.
 

Ryedan

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Now, I'm relatively new to mods, but something's been bothering me. There seems to be so much hype over sub-ohm coils, which in my opinion would only be useful when you have a mech mod with a direct connection to a 3.7v source (no major circuitry to worry about drawing too much current). But using a regulated power module to control your voltage seems to throw a wrench in that approach.

Take your 0.8 ohm coil and pass 3.7v through it and you're drawing 4.625A, that's well over the maximum of most cheap off the shelf power modules to deliver ~17w. Now assume you can find a 2A power module that can deliver up to 12v from a 3.7v in (there's plenty out there), just some quick math and you know you can max the thing out at 24w all within the spec of a cheap $5 module. The only caveat is you need a 6ohm coil. You can take this even further by raising the voltage and resistance, a lot of cheap step up regulators operate up to ~30v. I've never gotten into building coils myself, but I have to imagine getting super high resistance is possible (considering a 100w lightbulb's coil is ~144ohm).

My point is that it's much easier and cheaper to build a power supply running high voltage/low current than low voltage/high current, so what's keeping us from building high resistance coils to be powered with a relatively cheap high voltage step-up regulator? There must be something I'm missing.

I think what you are missing is that we are using a battery that puts out 3.7V on average (3.2-4.2) and there is nothing we can do to change that. So how do you get 8V from a 3.7V battery? You use a power regulator board that inputs 3.7V and enough amps to make the watts selected and outputs 8V and the amount of amps (less than input from the battery) required for the watts.

The calculation of battery amp draw then is not at 8V, it's at 3.7V (or if you want to accurate, at whatever voltage the battery is at) and the watts output, plus regulator loss (typically ~10%). In the end, apart from regulator efficiency differences at different voltages or watts, you'll find that 20 watts draws about the same amps from a battery at 5 ohms as from 0.2 ohms.

Also, as the battery voltage drops, amp draw from the battery increases with a regulated mod, the opposite to how mechanical mods behave.
 
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