Micro coils and ohms description

[burtonsnowww]

i used this alot when i first started, great job

 

[moondragon]

Karen, this has been SO useful that I compiled it into a spreadsheet for quick reference, and converted inside diameters to both decimal inches and mm's. Thank you, thank you, for ALL the work you put into this forum

For anyone interested, it's an Excel™ spreadsheet and I uploaded it to Google™ docs. The spreadsheet is here if you want to view or download it, and/or print it. Current through post #147

ETA: Cleanup up format and removed some duplicates

Love the spreadsheet! Thanks for pulling all that together!

 

[Vwls]

I know the knowledge is somewhere. Can you tell me if there's a good YouTube tutorial on the twisted wire coils? What's the benefit--is the surface area somehow greater than with straight wire?

Here's a vid that shows an easy way of doing it: How to twist wire for twisted wire coils - YouTube

Why twisted wire is great:
1) cuts resistance in half: lower resistance = more vapor (add in air flow and battery considerations here)
2) allows you to cover more real estate - since the resistance is lower, if you want to you can double the wraps, which means more wick getting heated - more juice being vaporized
3) renders a thicker, more durable piece of wire - coil lasts longer, bends and stays in place better, etc.

 

[jwat82]

Here's a vid that shows an easy way of doing it: How to twist wire for twisted wire coils - YouTube

Why twisted wire is great:
1) cuts resistance in half: lower resistance = more vapor (add in air flow and battery considerations here)
2) allows you to cover more real estate - since the resistance is lower, if you want to you can double the wraps, which means more wick getting heated - more juice being vaporized
3) renders a thicker, more durable piece of wire - coil lasts longer, bends and stays in place better, etc.

Twisting wire is good, but I'd much rather just use lower gauge wire. All the benefits of above but more consistent. Twisted wire can vary greatly in ohms per foot depending how tightly it's twisted.

This is, unless of course, were talking about Mundys Magic. Then all bets are off. (full disclosure I've never had the pleasure of trying it, but there are many here who use it almost exclusively)

 

[dtrud0h]

I can attest to the glory in Mundys Magic Wire. It is a game changer and it you haven't tried it then you should. Even if you make it FUBAR its better than twisted wire.

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[Vwls]

Twisting wire is good, but I'd much rather just use lower gauge wire. All the benefits of above but more consistent. Twisted wire can vary greatly in ohms per foot depending how tightly it's twisted.

This is, unless of course, were talking about Mundys Magic. Then all bets are off. (full disclosure I've never had the pleasure of trying it, but there are many here who use it almost exclusively)

Yep I've got a piece waiting to try (excited about it too) but I don't have an atty with big enough holes in the posts.

 

[Cavere]

Yep I've got a piece waiting to try (excited about it too) but I don't have an atty with big enough holes in the posts.

Most of my issues with twisted wire is trying to get two ends into the same post when I'm doing dual coils. It takes a bit of fiddling and sometimes swearing!

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[SeaNap]

Wire Type & Gauge: Mundys Magic .06 x .7 ribbon
Coil size (what you wrap it on): .055" ID
Number of Coils: 4
Measured Ohms of coil: 0.5ohm

 

[ancient puffer]

For future reference, if I've "like"ed an entry, that will indicate it has been added to the spreadsheet

ETA: If you don't see your post "like"ed (by me), it's likely there's missing information, so we couldn't include it. Also, it's really easy to transpose/screw up the numbers, so if you see an error, PLEASE let us know.

 

[Raynman]

Twisting two wires can give different results depending on tightness of the twisting. Here's what I made last night.

Wire gauge: two 28 gauge kanthal wires twisted
What wire was wrapped on: 1/16 drill bit
Number of coils: 10
Measured ohms of coil: 0.86

 

[sephirothcloud]

I tried to experiment with 29 AWG khantal wire for my RSST but keep getting E1 error on my provari. It's 3/12 wraps?? I also found that not many people are using 29 AWG, is there a particular reason? Any help is much appreciated.

 

[Raynman]

E1 error is a short. Fix coil before trying to use it on any mod.
From ProVari....
E1 – Short Circuit / Shorted Atomizer – If this error appears, remove t
he atomizer and replace with a different one or lower your voltage settings The ProVari will automatically reset when the problem is fixed or lower your voltage settings

.
The ProVari will automatically reset when the problem is fixed.

I just think the 29 is an in between and less common. Most folks use 30 and 28 but there are a lot of different sizes being used.

 

[ancient puffer]

28g and 30g seem to be the most common sizes being carried by ecig shops, so I suspect most folks just go with those. I assume that's a type on the "3/12" and you meant "3/2" so your resistance is probably too low.

Looking at the chart, I'd suggest you try a minimum of 6 or 7 wraps, then adjust from there if you're not satisfied with it.

ETA: if E1 is a short, definitely correct the problem, I'm not a Prov*** user But that's still a set up for a VERY low resistance coil.

 

[State O' Flux]

Not sure if you want to include 24ga Kanthal, but here's one for you.

Atty - Trident RDA
Wire - 24ga Kanthal A-1 (0.17Ω per in.)
I.D. - 3/32" mandrel (2.38mm / .094")
Coils - 7/8 wrap (compressed coils)
Resistance - 0.6Ω (this is the resistance for one coil)

Cheers... ;-)

 

[EagleTa2]

I tried to experiment with 29 AWG khantal wire for my RSST but keep getting E1 error on my provari. It's 3/12 wraps?? I also found that not many people are using 29 AWG, is there a particular reason? Any help is much appreciated.

I use 29 and 27ga Kanthal A1 for my builds. Why you ask? Simple - is in stock at Temco and 26 and 28ga are 11 weeks out!

I figure its close enough for what I need and I can always adjust my resistance with number of wraps and leg length. If I really wanted to dial in the resistance then I partially complete a coil and bend the leg back to get to right where I wanted to be.

For example - I wanted a 1.0 ohm coil to be my first build... got it to 1.02. Close enough

thanks
Geo

 

[clstearns]

E1 error on my provari.

E1 means two things: Either the circuit is open, or the circuit draws more amps than the device is designed to handle.

Try measuring the resistance. A Provari won't read resistance below 0.8 ohms, but will read "Lo." I use 29awg wire in my Reomizer, wrapped around a slightly-more-than-1/16ish inch thing, 9/8 wraps, and it comes out about 1.3 ohms. I suggest you try a 5/4 wrap, which should give you right around 0.9 ohms +/- of resistance.

It won't reliably fire anything below 0.9, and then only at 2.9 or 3.0 volts. It may fire, then will throw another E1.

Also: I assume you're using SS mesh for your RSST wick, which *can* cause the resistance to be quite low unless it has been properly oxidized. Try torching it, then dripping some straight VG (or some flavored juice, whatever) on it, then torching it while the juice is on there. This will give you a solid oxidation coating and keep the wick from "shorting" the coil.

Good luck!

 

[sephirothcloud]

E1 means two things: Either the circuit is open, or the circuit draws more amps than the device is designed to handle.

Try measuring the resistance. A Provari won't read resistance below 0.8 ohms, but will read "Lo." I use 29awg wire in my Reomizer, wrapped around a slightly-more-than-1/16ish inch thing, 9/8 wraps, and it comes out about 1.3 ohms. I suggest you try a 5/4 wrap, which should give you right around 0.9 ohms +/- of resistance.

It won't reliably fire anything below 0.9, and then only at 2.9 or 3.0 volts. It may fire, then will throw another E1.

Also: I assume you're using SS mesh for your RSST wick, which *can* cause the resistance to be quite low unless it has been properly oxidized. Try torching it, then dripping some straight VG (or some flavored juice, whatever) on it, then torching it while the juice is on there. This will give you a solid oxidation coating and keep the wick from "shorting" the coil.

Good luck!

Thanks for the the tip clstearns..You were right my resistance too low, I added a couple of more wraps to my ceramic coil and getting 1.4 ohms now. Thought that 29 AWG was too thick earlier 1st time experimenting with that thickness normally I would use 31 AWG.
Cheers buddy

 

[nattylite]

basically what I find is the length of the wire. I use my multi meter and test the restance of the length of wire trim it to what restance I want then I can bend it to any diameter I want or any shape I want the restance stays the same as long as you don't change the length. I don't count wraps i just use the length and a multi meter. makes it more simple for me

I'd thought of this too, but doesn't it make working with the wire quite difficult?

I'm also having trouble with my multimeter. I test the resistance of the leads and it will give me anywhere from 1.8 down to .4ish, then when I go to check on my atty it gives me a ridiculous reading like 8.9 or something. Now I know my 6/5 wraps of 30g kanthal is not 7.1 ohms, so what is going on here? Tried changing the battery and that didn't help.
Him having a similar problem with checking battery voltage. The meter just keeps gradually going up.

Sorry, not trying to hijack, but does anyone have any experience with this?

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[m3nace]

Maybe you have a short somewhere?

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[nattylite]

In the meter? How would I find it/fix it?

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