So I built a dual micro coil 6/5 wraps. Non twisted 28g wire. Reads .4 ohms and burns evenly with no hot legs. The vapor is amazing but holy .... the taste is crazy good and throat hit just perfect for me. Thanks so much for the tips guys! I think my problem was having that thick wire with only 3.7v and too much length as well. Not to mention my coil is too low so it was pretty much sitting in juice and now I'm not putting cotton under the coil. Will post pic.
Vapor problems on twisted 28g kanthal?
- Thread starter ohm ike
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Hey Ike, glad you got a build you enjoy. Thought I'd let you know though, the 3.7 volt batteries actually pump current at about 4.2 volts when fully charged, keep that in mind when calculating amperage. Also, as you know, thicker wire = lower resistance... lower resistance equals more power with the same voltage. Example:
I=V/R
P=I*V
where V=voltage, R= resistance, P= power (in watts), I= current (in amperes)
Let's calculate the current, then the wattage, for a 0.5 ohm build in a mechanical mod...
I= 4.2v / 0.5 ohm = 8.4 amps
P= 8.4 amps * 4.2v = 35.3 watts
Now we'll do the same for a 0.3 ohm build...
I= 4.2v / 0.3 ohm = 14 amps
P= 14 amps * 4.2v = 58.8 watts
In conclusion, your battery is not limited by its voltage but by its maximum continuous discharge current. So as long as you are keeping a safe margin from that limit, you will get more power through a lower resistance build. Maybe you can try a dual twisted 28 ga micro coil build using 8-10 wraps on each coil. In my experience, the key to wrapping a clean twisted 28 ga coil is to torch the wire before wrapping to get the springiness out, then torching the coil while compressed with pliers to hold its shape.
I=V/R
P=I*V
where V=voltage, R= resistance, P= power (in watts), I= current (in amperes)
Let's calculate the current, then the wattage, for a 0.5 ohm build in a mechanical mod...
I= 4.2v / 0.5 ohm = 8.4 amps
P= 8.4 amps * 4.2v = 35.3 watts
Now we'll do the same for a 0.3 ohm build...
I= 4.2v / 0.3 ohm = 14 amps
P= 14 amps * 4.2v = 58.8 watts
In conclusion, your battery is not limited by its voltage but by its maximum continuous discharge current. So as long as you are keeping a safe margin from that limit, you will get more power through a lower resistance build. Maybe you can try a dual twisted 28 ga micro coil build using 8-10 wraps on each coil. In my experience, the key to wrapping a clean twisted 28 ga coil is to torch the wire before wrapping to get the springiness out, then torching the coil while compressed with pliers to hold its shape.
You're right. Brain fart. Thanks for clarifying that!
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Current, like water, always travels through the path of least resistance. Before I wick my coils, I dry fire to see if the coils turn red at the same rate. If one is heating up faster, I use my needlenose pliers to squeeze the coil (making sure not to accidentally fire the device). I keep doing this until both coils heat up (turn red) at virtually the same rate. This way, vapor generation will be the most efficient.
I have the K101 and it's never caused me a issue (THE CHIP HAS SAVED ME FROM A BAD COIL), I also use the Smok octopus, at first it didn't seem to produce much vapor but then I drilled a hole in the side of it and put the hole over the coil and now its a vapor monster at 1.2 ohm.
Your second build looks much better. The only thing I would try and work on it centering the coil between your posts so that the legs are about the same length. This will help you from getting a "hot leg".
It is extremely hard to do. I don't know if all RDAs are the same but the 2 outer negative posts have the wire holes angles in while the middle post is straight. But yes, when I rebuild I will pay better attention to that. But for some reason it was and still is burning evenly with no hot legs.
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