CloudWizard

Ok, since you made me curious I went ahead and rebuilt a Vivi Nova Mini (same rebuildable heads as the bigger ones). I used a 5/6 of 32awg KanthalA1 on COV 3mm silica with a paperclip as a guide (it's all i have since it's what I use in my Pennies and Odys). And the verdict - 2.7Ω I used single strand wire (not twisted) or it would've come in around 1.5Ω with 5/6.

To answer the question about wraps, you'll always see folks give x/y because when you wrap a coil there is always 1 side that doesn't complete a loop. So in this case I wrapped a 5/6 meaning if you look at the top of the coil you see 6 wires and if you looked from the bottom (because the 2 tails stick down the bottom) you'd only count 5.

Lesson learned, there's not a lot of room inside the little cradle that hold the coil. 6 wide was a bit finicky as it touched the side and shorted (easy to fix by just squeezing in towards the center to compress the coil) so next time for ease of use I'd do 4/5 of 32awg and it'd come in around 2.2Ω-2.3Ω.

I did all my setup on a Vamo since I think in your original post you said that's what you're were using, decent vape @9watts :-)

Have fun building!

Burnt happens when there's too much heat (roughly analogous to power - measured in watts) for the juice or the wick is crudded up (all coil/wick setup eventually wear out). Good rule of thumb is that resistance + 2 = ~8watts and then adjust up/down to get the flavor dialed-in for preference.

Examples:
1.5Ω@3.5volts -> 8.2watts
2.0Ω@4volts -> 8.0watts
2.5Ω@4.5volts -> 8.1watts
3.0@5.0volts -> 8.3watts

Where most VV/VW devices run into issues is with the amperage limitation built in to the switch (it's a safety feature). If I remember correctly a Twist is 2.5A, a Provari V2 is 3.5A and a Vamo is 5.0A. If you tried to use a 1.5Ω atty on a device with a 2.5A limit, you never get higher than 3.8volts regardless of how far you turned the swtich.

There are a bunch of useful free Ohm's Law calculators for iPhone or on the web (http://www.ohmslawcalculator.com/ohms_law_calculator.php).

i finally get it. it usually takes me a minute for me to understand but once get it i got it! thanks a ton

I've had mixed results. I ordered a few of both the 3.2mm and the 2.4mm. They are really disappointing at first (especially for someone like me with the attention span of a knat...) but once broken in they perform pretty well. They're not as strong/crisp a flavor as I can get with #500 mesh but the vapor production is really good. Wicking-wise, this also gets better once broken in but I do leave the fill hole screw loose (vs. closed for SS mesh wicks).

Setups I've tried:
30awg Kanthal on 2.4mm in Mini-DID (4/5 wrap @ ~1.0Ω) - one of the better performing setups I've tried
0.6mm Kanthal ribbon on 3.2mm in Std DID (3/4 wrap @ ~1.0Ω) - pretty good once broken in
0.8mm Kanthal ribbon on 3.2mm is Shortie DID (3/4 wrap @ ~0.8Ω) - so so...

For all of them I'm using the "hot wrap" method (much better results than simple wrapping)

Hi Uma,

Kanthal and Nichrome have different resistances/length. Kanthal is typically +10% resistance for the same length. So, on silica wicks you can get more twists with Nichome than Kanthal for the same resistance. For me, I use Kanthal on everything simply because it has a higher melting point so I pop fewer coils on ultra-LR.

On the twisted wire, resistance is a measure of how much restriction is put on the flow of electricity. Like a water pipe, the smaller the pipe the more restriction. Unlike dual coil cartos (completely independant coils - 2x 3.0Ω coils => 1.5ΩDCC) a twisted wire is touching along the whole length so you don't actually get "double the flow". It does lower the resistance to about ~2/3 (not 1/2). I haven't used twisted wires in a while instead opted for getting fatter wires. Where I used to twist 32awg, I now pretty exclusively use 28awg or 30awg. Twisted wires give a different type of flavor to me, slightly muted but also are very easy to work with and very forgiving for wrapping.

What I'm really enjoying these days is 0.6mm x 0.1mm Kanthal ribbon. I wrap it the same as 30awg/28awg: 2/3 on fat wicks and 3/4 on thinner wicks.

Let me know if I've missed the point with these responses (multi-tasking atm...)