Followup on alternate Vivi Nova coil winding

[AttyPops]

I commented a while back in another thread about using an alternate winding. Pic here:

This has advantages and disadvantages.

Advantages:
1) Reduces shorts by putting ground connections on the outside edges of the wick.
2) Doubles up the center wire to reduce heating the positive lead where you don't want it. Heat is put where you want it...on the wick.
3) Divides the ground and provides a double-coil effect where it MAY still work if one side get's broken (although if you don't turn down the voltage, the other will fry soon thereafter).

Disadvantages:
Lower ohms. Harder to get proper ohms since it's essentially a dual coil and cuts the ohms in 1/2.

I promised in that other post to try it with thinner wire...well....reporting back...it's working great. The coil is glowing very uniformly across the top of the SS mesh that I'm using. Not glowing (that I can tell) down the center where I don't want it. I still have to turn my VV way down, so it's probably not as efficient on battery life (linear regulator box mod) but over all I'm happy with it.

Now to see how long it lasts. Anyone else using the dual-coil wrap?

 

[MDuncan]

could you do this using non resistance wire on the leads?

 

[AttyPops]

Yes. However that's even harder to get ohms high enough since the resistance wire length would be even shorter. You could try it...just be sure to test with a multimeter before use.

 

[anyzis]

I tried your method, seems to work very nicely. Do you still use it? I'm quite surprised this thread did not receive more attention

 

[AttyPops]

Now that I have higher resistance wire, it's easier to use this method that it was before. So...yes.

It's not a new idea. Basically all the Dual-coil stuff on the market is doing some variant of this...if you think about the wiring diagram.

The main thing for me was avoiding shorts to the outside edge without having to use that little silica sheath insert.

 

[anyzis]

Here's an implementation of this idea in a Kanger T3 that I've been using now. Took pictures as I recoiled to increase resistance.

 

[chet]

I've been struggling with shorts with my EVOD and Vapeonly bottom coil tanks. I never had to deal with short problems with Vivi Nova atties and I'm still quite unsure where it's shorting. Is it the shaft that caps the atty on the top causing this by touching the coils?