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This wire is probably made of Kanthal-D (not Nikrothal) EDIT: Nichrome 80
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#1 (permalink)      6/23/2014 7:10:13 PM US Central   quote/reply + tips
beeorchid
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This wire is probably made of Kanthal-D (not Nikrothal) EDIT: Nichrome 80
EDIT: This wire is actually made from Nichrome 80. See update bellow.

This wire is probably made of Kanthal-D, and not Nikrothal (Nichrome).
Here is why:

1) According to the spec, the total wire length is 95 mm and the leads are 30 mm. Therefore, the resistive part length should be 95-2*30=35 mm.
2) Also according to the spec, the wire diameter is 0.2 mm (= radius of 0.1mm).
3) Nikrothal 80 (Nichrome 80%) has an electrical resistivity of 1.090 Ωmm²/m, while Kanthal-D has an electrical resistivity of 1.350 Ωmm²/m.
4) So, if that wire is made of Nikrothal 80, it should have a resistance of (1.090x35)/(1000xπx0.1²)=1.214Ω, but if it is made of Kanthal-D, it should have a resistance of (1.350*35)/(1000*π*0.1²)=1.504Ω

Therefore, the published resistance of 1.5 ohm indicates that the R wire is very much likely made of Kanthal-D.

EDIT:
On 18/July/2014 I finally received this wire and took measurements. Its published dimensions are incorrect and it is actually made from Nichrome and not from Kanthal.
I would like to apologies to anyone who might have purchased this item only because my previous speculations made them believe it is made of Kanthal.

Following are the correct specifications:
Overall length: 101mm (not 95mm, as published by FT).
R segment: resistance=1.50Ω, length=41mm, diameter=0.195.
NR segments: length=30mm (each), diameter=0.245mm.
Diameters were measured using a calibrated micrometer (SKU 1268503).
Resistance was measured over a genuine Bulli-A2 rebuildable atomizer, using two different atomizer resistance testers (SKU 1494601 and another brand).

These measured values of the R segment clearly indicate that it is made of Nichrome 80, which has an electric resistivity of 1.090 Ωmm²/m.
(1.090x41)/(1000xπx0.195²)=1.496Ω
Had it been made of Kanthal-D (like my previous speculation suggested), this wire would have been ~1.85Ω.
(1.350x41)/(1000xπx0.195²)=1.853Ω

I took similar measurements of the 1.3Ω wire SKU 1758907, getting similar results – it is also made from Nichrome and not from Kanthal.
I did not yet receive the 1.7Ω wire SKU 1760909, but according to forum member Schnarph it is not magnetic, so probably made from Nichrome as well.

Edited on 7/19/2014 at 5:36 AM. Reason: apdate
#2 (permalink)      6/25/2014 4:02:29 AM US Central   quote/reply + tips
hebum
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Thanks for that:-)
#3 (permalink)      7/11/2014 2:34:29 PM US Central   quote/reply + tips
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HybridMask
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Are you sure, beeorchid? How about this one? http://www.fasttech.com/product/1760909
Do you think it's Kanthal A1?

Edited on 7/11/2014 at 2:46 PM. Reason:
#4 (permalink)      7/11/2014 3:31:35 PM US Central   quote/reply + tips
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Excellent deduction, sir. Totally plausible.

I doubt beerorchid (cool name) is coming back to see this, but there's something that doesn't add up...

SKU 1758907 is 1.3 ohm, SKU 1758906 is 1.5 ohm, and SKU 1760909 is 1.7 ohm, yet they all claim to be 95mm length, .2mm width, with 30mm NR leads.

Would that mean the 1.5 ohm is Kanthal D, the 1.3 is Ni-Chrome 60 or 80, and the 1.7 is Kanthal A or A-1? Or are the leads .2mm and the resistive wire gauges undefined? Once again, I don't trust the item descriptions.
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#5 (permalink)      7/11/2014 3:50:10 PM US Central   quote/reply + tips
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HybridMask
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Thanks mate. I am a begginer, you know. I will buy my first "rebuildable" material in the next week or so.
I don't know if I calculated right, but if kanthal A1 is 0.46 ohms per cm, then the math should be (1.460*35)/(1000*π*0.1²)= 1.626 ohms.
I want to buy this 1.7 ohms for my evod heads to use with the egos batteries. I think this one is better than the 1.8 nichrome that sells here? Cost 2,40 dolars i guess.
#6 (permalink)      7/13/2014 6:15:03 PM US Central   quote/reply + tips
beeorchid
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@Schnarph – good observation!
I'm afraid you are right and that the spec of total 95mm length is incorrect in at least 2 out of the 3 wires you've mentioned.
Unfortunately, if that is so, then obviously the calculation I did above is also wrong.
If you (or anyone else) receives this item, then please measure a) the resistance and b) the length of the R section, and I will update my calculation and reassess the alloy this wire is made from.
Anyway, I've already ordered SKU 1760909 (that you've mentioned), which might be made from the same alloy. Once it arrives I will take measurements and update this thread with my findings.

@HybridMask – welcome and good luck!
If that is not too late, maybe I can help…
Evod/Ego combination is my daily vape and I currently use it only with NR-R-NR wires bought from FT.
Up until now I've tried 12 different NR-R-NR wires available on FT and found only 3 of them to perform really good over an Evod/Ego combination (i.e. set as a microcoil under 3.7-3.5 Volt).
1) SKU 1591702 and 1591800 are identical 2.4 ohm 55mm AWG 33 (~0.18mm diameter) Nichrome (probably N8). I unroll it over a needle and then rewrap over an M1.7x0.35 machine screw. Alternatively, it could be wrapped densely (10.5 wraps) over a #54 drill bit (~1.4mm diameter) – almost as dense as a "classic" microcoil. You'll be surprised how efficient and powerful a correctly set up 2.4 ohm microcoil could perform – in my opinion better than a sparse 1.8 ohm coil. I find this wire best for PG based liquids. It might be possible that the cheaper and easier to work with SKU 1680300 is also identical, but I haven't got it yet to verify this.
2) SKU 1521300 is 2.45 ohm 45.5mm AWG 34 (~0.16mm diameter) Nichrome (probably N8). I wrap it over a #1(72) machine screw. Alternatively, it could be wrapped densely (8.5 wraps) over a #53 drill bit or a 1.5mm drill bit. This wire is a little too hot for PG, but I love it with VG based tobacco flavors.
3) SKU 1620600 is 2.75 ohm 49mm AWG 34 (~0.16mm diameter) Nichrome (probably N8). I use it to make ~1.4 ohm dual-coils, by rebuilding the dual-coil Evod heads as in SKU 1662604. Since these heads are in a "cross" geometry, in order to allow good airflow and to prevent the two coils from touching each other, I make them especially "narrow", by wrapping over a #0(80) machine screw. Alternatively, they could be wrapped densely (10.5 wraps) over a #56 drill bit (~1.2mm diameter). Obviously this low resistance setup should better be used with a large Ego battery of at least 900 mAh. This setup is incredibly powerful and efficient, easily outperforming my silly big ~1.1 ohm Fogger V4 (SKU 1670700) dual-coil setup – in both vapor quantity and flavor quality (not to mention compactness and ease of use…).
4) I find all other NR-R-NR wires I bought from FT to be of great quality as well, but they do not perform so well when wrapped densely (i.e. as microcoils) under 3.7-3.5 Volt, which is what typically provided by common regulated Ego batteries. However, if you use a variable voltage MOD (finding the correct power), or make larger and more sparse coils (i.e. not microcoils, which is less suitable for Evod IMO), then all of them perform very well.

Edited on 7/13/2014 at 6:24 PM. Reason: misspell
#7 (permalink)      7/13/2014 8:02:05 PM US Central   quote/reply + tips
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Schnarph
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The only insight I can provide in the near future is for SKU 1760909 (1.7ohm), whenever USPS decides my package has had a full tour of the US (SMH). The cheaper NR-R-NR wires work pretty well for clearo head coils. As you said, I find the "R" portion of wire too thin for microcoils as it gets hot really fast, the general nature of resistive wire thickness. It all comes down to wire temp, which can be modified with flat wire, crazy twisted wire combos, microcoils (wrap spacing), and everything in between.

Just making assumptions based on the pics, the "R" portion of these new, more expensive NR-R-NR wires looks thicker than previous options sold here. I hope it spreads out the heat better than the other stuff.
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#8 (permalink)      7/13/2014 8:57:21 PM US Central   quote/reply + tips
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HybridMask
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Thanks, beeorchid!
I didn't bought the rebuild stuff yet.

The two EVOD kits that I've got is the one FT sells, with two 1300 mah battys. The kit come with 2.5 ohms coils and the spare coil heads I got are 1.8 ohms.

Tell me, why so hight ohms build (2.4)? Why not 1.8 ohms? I thought that vapor and flavor would be better in lower ohms build, that's why I wanted to buy these 1.7 wires (and because it's suposely its kanthal).
Hmmm, I like more the idea of purchasing the wires and not the Pre_Coiled coils, because I want to try to build coils myself, haha. Maybe try some microcoils?! Haha!


I will also use PG based ejuice. 65/35 pg/vg max. Others I have are 75/25 pg/vg.

Also, I 've bought a Vamo V5 too, I will use it with the EVODs as well. Need to wait until it to arrive. The EVOD will arrive in this week. yaaaaay. (:

I will have in total 9 evod coils (four 2.5 ohms and five 1.8 ohms). I guess I have supply for 1 month and a half. So I need to buy the materials for rebuild in the next three weeks (max).
I hope your 1.7 ohms wire arrive until this. xD

Edited on 7/13/2014 at 9:01 PM. Reason:
#9 (permalink)      7/14/2014 6:43:55 AM US Central   quote/reply + tips
beeorchid
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@HybridMask
In general, a lower resistance wire will produce more vapor (that’s a common knowledge). However, that does not imply getting a better flavor!
Similar to food cooking, the vape flavor is mainly dictated by the heat of the wire/liquid interaction.
Having the wire too cold would lead to a dull "greasy" and "cooked" flavor (hard to describe) and a too hot wire would lead to a nasty "burnt" flavor.
The heat of the wire is influenced by 3 main factors: a) the wire's power density, b) the coil's wrapping spacing, c) the airflow.
For example, using Kanthal A-1, both a 56mm long AWG 30 (~0.25mm diameter) wire and a 23.5mm long AWG 34 (~0.16mm diameter) wire, would make a ~1.7 ohm coil.
So, would they both provide the same vape quality at 3.7-3.4 Volt? – not at all!
While the AWG 30 coil would give great flavor as a microcoil, the AWG 34 coil would give a terrible "burnt" flavor (even if wrapped very sparsely).
That's because the power density of this AWG 34 example is almost 4 times higher than that of the AWG 30 example.
That AWG 34 example is ridiculously extreme and was only given to make a point.
In reality, all the 12 different NR-R-NR wires I got from FT so far, had reasonable and useful spec.
However, I found only the aforementioned 3 wires to perform well when densely wrapped (i.e. microcoils) under 3.7-3.4 Volt.
One of the main reasons why so many people prefer microcoils, is that they seem to be more efficient (providing more vapor for the same power).
But for me, the main reason is that they are also very consistent (providing the same flavor on every build).
In contrast, with sparsely wrapped coils, it is hard to ensure the same heat performance on every build you make (the coil may turn out too sparse or too dense).
However, that is only relevant if you use simple regulated batteries. If instead you use a VV MOD (such as your Vamo), then you can always adjust the power to meet the sweet spot of any given coil.
I haven't got the 1.8 ohm wire SKU 1521201 that you've mentioned, because according to my "speculated" spec it should be too hot as a microcoil.
I've posted my doubts with respect to SKU 1521201 in its forum, asking other members to post actual length and resistance measurements, but no one answered my call (so if you get it, please do…).
However, using your Vamo I'm pretty sure you could find its sweet spot on every build you make (microcoil or whatever).

EDIT: taking another look at the forum of SKU 1521201, member Nisei did take measurements of the R section length (42mm).
This leads me to deduce, that if set as a microcoil, it would perform well under 3.0-2.7 Volt. Not for me…

Edited on 7/14/2014 at 6:59 AM. Reason:
#10 (permalink)      7/14/2014 12:00:08 PM US Central   quote/reply + tips
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HybridMask
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Hmmm Thanks for a lot of that information. I guess i will try both 1.8 and 2.5 coils that will arrive tomorrow and maybe I can "see" the diference.

Hmm... Can I ask you a favor? Do you mind posting some photos of the microcoils that you do with the Pre-made and 2.4 ohms (I know you don't tried these ones)?
I have no clue of how to make a microcoil for a kanger head (EVOD), only the basic wait around the silica.

Sorry about my english, mate.
#11 (permalink)      7/16/2014 3:04:24 PM US Central   quote/reply + tips
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Hey, beeorchild, take a look!
Looks to have good quality?

http://www.fasttech.com/forums/1758906/t/1329173/good-quality-so-far-will-fit-for-ce2-ceramic