coil builds

[justinlm24]

I'm about to venture into doing my own builds and I had a silly question. I have watched dozens of videos on how to do builds and have even done a couple builds on some of my friends attys. I have one friend who on all his dual builds he uses two coils with different wraps. For example one coil with 7 wraps and one with 5. Does anyone else build this way? I have never asked him why he does this and in all the videos I've watched I've never seen anyone else do it. Is there a specific reason? Just curious

 

[State O' Flux]

I have one friend who on all his dual builds he uses two coils with different wraps. For example one coil with 7 wraps and one with 5. Does anyone else build this way?

Your friend doesn't have a good grasp of electrical theory.

If they are dual parallel coils, with different resistances, the lower resistance coil will heat first... and the higher resistance coil - depending on the resistance "spread" - may never reach a temperature sufficient to vaporize juice.

To put it a slightly different way...

Any time you have multiple coils in a parallel circuit, regardless of number, the goal is to have them all heat at the same rate, and to the same temperature. The highest resistance coil will still flow current, but the greater the spread, the less current it will receive.

This focuses more wattage to the lower resistance coil, causing it to run hotter than if the coils were sharing current equally. That means the "hot" coil may burn it's wick, while the "cold" coil may get just hot enough to gunk up, yet provide little vapor.

 

[Rabbit Slayer]

Something like this?

 

[Thrasher]

Jeez look how long the coil stays red that make zero sense

 

[justinlm24]

It didn't make sense to me either And I haven't even done a handful of build yet. I always thought both coils needed to be as similar as possible. I wouldnt use his method I was just curious if there was a reason why.

 

[Ryedan]

It didn't make sense to me either And I haven't even done a handful of build yet. I always thought both coils needed to be as similar as possible. I wouldnt use his method I was just curious if there was a reason why.

I have not tried this, but then I stick with pretty straightforward coil designs of one wire per coil and I use the same resistance and gauge in multiple coil builds. I've seen dissimilar coils demonstrated before and it does make sense to me. The lower mass coil will get hot first and then the higher mass coil will start to make vapor when it heats up.

As State O' flux said, these setups could have one coil get too hot and burn juice and/or the other coil not get hot enough to make vapor. OTOH, these designs are another way to make vapor and I imagine if they are executed well they could work quite well. If I were to design a setup using different coils I would use Steam Engine to make sure that there was a power window in which neither coil would burn juice and both would make vapor. I only watched a few parts of the video that was linked to and noticed he showed examples of combining very similar coils and some that were quite different. I imagine the more difference between the coils the harder it would be to make the system work properly.

I do consider this an advanced technique and I suggest you don't experiment with it until you have figured out how to make conventional setups work well for you, decide this is something you want to try and know why you want to try it.