If your coil doesn’t seem to glow uniformly and there are certain “hot” spots on the sides, you will need to press it with your tweezers and adjust it with the screwdriver and drill bit. You are looking for an uniform glow, starting from the center and slowly reaching the ends. When this happens you’re ready to mount your wick. We generally use organic cotton since it’s extremely versatile. You will need to take a piece of cotton and roll it into a long wick, that’s thin enough to pass flush through the coil.

double coil RDA build Once you have your cotton mounted, you will need to cut off any excess, but at the same time allow sufficient wick to hold your e-liquid. You will need to start cutting the ends but leave at least one inch of material on each side. Now, using a screwdriver you will need to gently insert the remaining wicking material into the well, being extra careful not to block any of the airflow holes or channels. It’s easier to do this if the cotton is wet so we suggest infusing it with a few drops of e-liquid. Before mounting your top cap it’s recommended that you fire up your mod and see if there is vapor coming out. Once you’re done you’re ready to start puffing.

The same procedure can be followed if you want to build a dual coil or even quad coil configuration. You will always need to take into consideration that every one of your coils needs one end to be connected to the positive post and the other end to a negative post. You also need to understand that all your coils need to be exactly the same (AWG and number of wraps). When using dual coils, the end resistance of your atomizer will be that of your coil divided by two. When you are using quad coils, the resistance will be that of a single coil divided by four. If, for instance you have a 1.8 Ohm coil and use it in single coil mod, your atty will show 1.8Ohms on the ohmmeter. If you use it in dual coil mode, it will show 0.9Ohms… but if you use it in quad coil mode it will give a reading of 0.45Ohm.

Besides regular coils, some people like two twist two or three pieces of Kanthal together using a power drill and come up with “twisted” coils. At the same time, two twisted coils (winded in different directions – one clockwise and the other counter-clockwise) put side by side and wrapped can create a “zipper” coil. Another variation is the “Clapton” coil that involves wrapping a bigger diameter Kanthal wire around a smaller diameter wire by also using a power drill. These variations can be looked up on the internet under the name of “coil porn” which is a niche part of the vaping community. These complex coils give some of the best vapor and flavor ever experienced and they look spectacular.