Determination of KangerTech Protank II™ Resistance Coil Wrap Counts

[bartlj1]

Hello Everyone,

I have had some problems determining the number of wire wraps to use when targeting a specific coil resistance value when rebuilding the[FONT=Calibri, sans-serif] KangerTech Protank II[/FONT]. Internet videos always seem to miss the intended resistance. As a result I have investigated the reason for this resulting in a white paper describing my findings. While a bit of elementary algebra is required, all results have been entered into tables for ease of comprehension. A pdf attachment is included. I hope this help those who are new to rebuilding coils.

 

[Coastal Cowboy]

Very nice first contribution!

You've hit on a key point--it's not necessarily the number of wraps used but it is all about the amount of wire. You can place your multimeter leads at any two locations along a section of resistance wire, and move them closer together or farther apart to determine how much you need to reach your target resistance.

Not everyone finds 32ga wire to be optimal, nor does everyone use the same diameter of wicking material. There are lots of variables, but the key is understanding how much wire it takes to achieve the target level of performance and getting as close to that amount of material as you can.

 

[deboraht]

So for a 3mm wick less turns as you are using just as much wire with more turns on a 2mm wick?

 

[Wow1420]

Excellent.

What about adding a line for 33 gauge? And 2.5 and 3 mm wick?

I think your table has convinced me that I need to order a spool of 33 gauge.

 

[softarno]

Amazing that makes my life easier, I have not started yet doing this but that really helpful
thank you so much for the effore

 

[truen00b]

Very nice indeed! Downloaded and saved as i was thinking about doing this myself!

THANK YOU

 

[maabaa]

Hey, I've been working working with 34 gauge (because that's all I had). It seems doubling it and twisting it makes a twisted wire that seems according to your numbers equivalent to 32 gauge. Now I understand why it was impossible to work with as it was. Thanks !

 

[Ronald3638]

Nice Job.

I put together a spread sheet last week that does just as you describe.

I like to use a 4-40 screw to make my protank coils.

I compared my spread sheet to the Vapers Tool Box Android App and its 1 wrap less than what my spread sheet shows but I wrap it to my spread sheet and get a consistent 2.2 ohms with 5 wraps and 1.8 ohms with 4 wraps.

When using screws I use the pitch diameter for my calculations.

4-40 .0958 Inch Pitch Diameter
6-32 .1177 Inch Pitch Diameter
8-32 .1437 Inch Pitch Diameter

A 6-32 screw works good for the RSST with 28 or 30 gauge resistance wire.

 

[papabogart]

Hello Everyone,

I have had some problems determining the number of wire wraps to use when targeting a specific coil resistance value when rebuilding the[FONT=Calibri, sans-serif] KangerTech Protank II[/FONT]. Internet videos always seem to miss the intended resistance. As a result I have investigated the reason for this resulting in a white paper describing my findings. While a bit of elementary algebra is required, all results have been entered into tables for ease of comprehension. A pdf attachment is included. I hope this help those who are new to rebuilding coils.

Very, very nice work.
For those who really want to get nit-picky with the calculations, they can take Ronald's advice and calculate for pitch diameter and also add 1/2 the thickness of the wire to the diameter.

 

[PhatRon]

Thank you for making this, it is very useful and I find it very helpful.

It seems doubling it and twisting it makes a twisted wire that seems according to your numbers equivalent to 32 gauge. Now I understand why it was impossible to work with as it was.

If you double the wire then it takes longer for it to heat up, but retains the heat more. Just a matter of your preference. I did it with my 32 gauge wire and I am able to use more wraps in a "microcoil" type setup that I use for my broken EVOD that I converted to a dripping device.

 

[SmoKnoMoCigZ]

excellent thread. thanks for the info!!! only been rebuilding protank coils for a couple weeks now and this info helps a lot.

 

[moroigirlz]

I rebuilt my first protank coil and the problem I am having is it burns the back of my throat and hardly no vapor no matter how hard I hit it. Can anyone tell me what I did wrong

 

[BillyWJ]

Love this, thanks!

Now, can anyone explain or show how to get a 10 wrap coil into a Kanger head, using 30 gauge? I can barely fit 7!

 

[Wow1420]

I rebuilt my first protank coil and the problem I am having is it burns the back of my throat and hardly no vapor no matter how hard I hit it. Can anyone tell me what I did wrong

The mistake I made on my first coils was wrapping the wire too tightly around the wick, which choked off liquid flow through the wick.

 

[moroigirlz]

Okay, I'll try that thnx. Will the pt2 work better with the vamo v3 than it does the ego c 1000mah?

 

[Glenn_K]

Okay, I'll try that thnx. Will the pt2 work better with the vamo v3 than it does the ego c 1000mah?

The eGo puts out a constant voltage, whereas the Vamo will let you adjust the voltage higher or lower until you find the vape you enjoy the most. The Vamo can also make adjustments based on wattage, which is how I use mine -- I find that 7 watts is about right for my Davide, which is pretty much identical to a PT2. If you don't mind some Google time, Kanger itself has put out a recommended wattage range for the PT2 (which I recall being somewhere in the neighbourhood of 5 or 6 watts).

Welcome to the forum btw.

-- Glenn

Edit: Thanks to the OP for the attachment, it is very helpful. Welcome to ECF.

 

[WarHawk-AVG]

I rebuilt my first protank coil and the problem I am having is it burns the back of my throat and hardly no vapor no matter how hard I hit it. Can anyone tell me what I did wrong

Did you apply a flavor wick over the coil after you rebuilt the lower coil?

Do you know the resistance of the coil?

eGo batteries if unregulated provide whatever voltage that is in the battery to the head, if the resistance is either too high or too low it can result in the vaping power being off, eGo batteries voltage go from 4.2vdc at full charge to 3.2-3.3vdc full discharge, you need to know the resistance of the coil using the below chart you will see the "optimum" range for the resistance on a simple eGo unregulated battery is going to be 1.8Ω-2.2Ω, too much power and it can burn the juice, too low power and the vape isn't very good

Okay, I'll try that thnx. Will the pt2 work better with the vamo v3 than it does the ego c 1000mah?

Absolutely it will...due to the ability of the Vamo to adjust the output voltage independent of the resistance of the coil...you can dial in the voltage to the resistance..in the VW mode it does it all itself...set a wattage, the Vamo will auto adjust for you

In later released of the Vamo V3 the Average mode option has been put back in (older V3's it was RMS only), you have to activate the RMS mode or it can taste burnt, hold the down button 10 seconds display will show NO1, release button hold it again for 10 seconds it will toggle to NO2, you want to run in RMS mode it does a much better job but may make a funny "rattlesnake" sound due to the pulsing of the DC output from the PWM

The Vamo has a resistance meter built in (hold right button down for 3 seconds) also in the options set it to wattage mode, dial in 6-8watts (I have been running mine at 6.5watts since I got mine) and never have to worry about adjusting voltage no matter what head you put on your Vamo (considering the "normal range" of coils 1.8Ω-3.0Ω [my target range for all my builds is 2.0Ω]), it will automatically do it for you