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#1 (permalink)      4/15/2014 6:11:29 AM US Central   quote/reply + tips
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Robert1
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Harsh as
I've using this wire for a month. The vape got gradually harsher and harsher, later heavy chest followed by burning in mouth and throat. I thought I had vapers tongue so switched to cartos and it went away. Than I started on this wire again and symptoms returned. So I started using Kanthal as I used to and have no more problems.
I suspect this wire might be giving something off perhaps as it degrades. I can't be sure but won't use it again. Just thought I'd share it in case anyone else noticed something bizarre while using this wire.
I Vape in {{{ STEREO }}}
#2 (permalink)      4/15/2014 6:29:49 AM US Central   quote/reply + tips
Sonikhan
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I tried them for a wile (just as backup if my good coils had to be changed during travelling) and felt the same, harsh to vape (and this was not caused by the wrong resistance).
As we are not told what material (Kanthal or NiChome would be OK)is used I think that Manganin or an other alloy is used. If the alloy contains dirty copper even lead could be a serious problem.
As long as we don't get a statement to the containig components I will not use these.
#3 (permalink)      4/15/2014 6:38:57 AM US Central   quote/reply + tips
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mrpurfect
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it says in the discription nichrome
#4 (permalink)      4/15/2014 8:35:34 AM US Central   quote/reply + tips
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Robert1
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Sonikhan - Well at least I'm not alone which means that there is something not right with this wire. Why is it black anyway, every other wire I've ever had was silver. Every original Kanger etc coil is silver too. We need to remember that people will sell anything for profit even if it kills. Tobacco industry been doing that for long enough still no one cares because there is money in it.
I Vape in {{{ STEREO }}}
#5 (permalink)      4/15/2014 9:00:49 AM US Central   quote/reply + tips
Sonikhan
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Robert1 - All NiChrome gets silver/grey after a dryburn but these won't. As you say they'll mix in what ever if it sells. I heard of a big issue with steel recycled from old submarines (Atomic-reactor-powerd) that is mixed into the steel used for surgical instruments so I would not be surprised if the glow without using a battery :)
#6 (permalink)      4/15/2014 9:05:23 AM US Central   quote/reply + tips
bibi2013
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its coated ?
Edited on 13/32/2013 at 13:61 PM. Reason: yes
#7 (permalink)      4/15/2014 4:32:00 PM US Central   quote/reply + tips
beeorchid
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Robert1 and Sonikhan, maybe I can help.
Most commercial e-cig resistive wires in the market are based on Nichrome 80/20.
If the specifications published by Fasttech are correct (0.16 mm, 2.0 Ohm), then the resistive wire length should be around 37 mm.

Assuming it is indeed 37 mm long 0.16 mm Nichrome 80/20, then this could easily explain the harsh performance you experience, since under 3.7 volt it would produce a power density of 0.37 watt/mm², which is quite hot!

According to my experience, the highest power density which still provides non-muted flavor, is around 0.45 watt/mm², but that's only with certain VG based e-liquids, using a very sparse coils (i.e. not a dense microcoil) and having an excellent air flow. Furthermore, many PG based e-liquids start giving muted burnt taste already beyond 0.35 watt/mm².
Dense coils, such as microcoils, perform best at around half of that, meaning 0.16-0.22 watt/mm².

So, in order for the assumed 37 mm wire to provide good flavor, it should not be set as a microcoil, but rather as a very sparse coil, such as 5.5 wraps over a 2.0 mm core, having a gap of around 1 mm between wraps.
Even under these conditions, some "fruity" PG based e-liquids could still taste burnt.
If you have a variable voltage battery, setting it to a low voltage, such as 3.0 Volt, might also help.

Please verify it is indeed 37 mm long and 2.0 Ohm – if not, please let me know the actual numbers, so I could recalculate correctly…

Edited on 4/15/2014 at 4:56 PM. Reason: mistake
#8 (permalink)      4/15/2014 4:43:13 PM US Central   quote/reply + tips
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Snorkelwhacker
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I've been using the 1.5Ohm NR-R-NR wires from FastTech for months and haven't noticed any of these problems.

They're great.. I even order another 100 pack to pad orders and keep a healthy stock of these fantastic wires on hand.

Instead of looking to the faultless product as the source of your poor vape quality, perhaps you should look at your build.
Rube Goldberg would get a kick out of "temperature control" devices.
#9 (permalink)      4/15/2014 4:56:33 PM US Central   quote/reply + tips
fuadali9
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I already bought a pack of 50 two days ago but...

Can someone from staff explain us why is black?

Supposedly the resistance part (Black) should be "nichrome" but looks like another metal alloy, and the Non-resistance part which material is? Cause nichrome has resistance.

????????

Edited on 4/15/2014 at 4:58 PM. Reason:
#10 (permalink)      4/15/2014 5:02:04 PM US Central   quote/reply + tips
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Snorkelwhacker
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That's a good question. All readywires seem to have black R wire. I assume its to ease detection of the NR-R demarcation point, but what makes it black? Oxidized chromium? Perhaps.
Rube Goldberg would get a kick out of "temperature control" devices.
#11 (permalink)      4/15/2014 5:09:37 PM US Central   quote/reply + tips
beeorchid
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Snorkelwhacker, since you were using a different wire, please consider that the reported harsh flavor is not due to a bad built, as different wires behave differently.
For example, I've been using similar NR-R-NR wires SKU 1521300 – which are so great, but I also tried SKU 1521200 – which were too hot as microcoils.

fuadali9, the black color is due to deliberate oxidation, which is meant to prevent shorts ("hot spots") when set over a stainless-steel mesh wick ("Genisis").