SXK's self-branded TC mod - Nebula 50/60; TC with TCR adjustment; Big Screen; C/F temps

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Agnes Black

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Ni200 30g, 2.5mm wrap, 14 wraps, organic cotton, Kayfun 4 Infinite Clone, 30w, 310f, .23ohms, Southern Sky Strawberry Custard 6nic max VG, Nickel Purity set at 100 due to high quality US made wire. 2puffs wide bore short drip tip. Perfect setup -- if I use 28g wire and lower ohm build, the TC pulse is slower and rhythmic. If I use 30g, more wraps, higher ohm builds the TC still pulses, but the pulses are so quick you hardly notice. Plus it's a very flavorful, cloudy, satisfying vape. I don't like dripping or a lot of the subohm tanks, yet don't like cartridge Atlantis vaping either. Nebby + KayfunV4 is a nice balance of flavor and power. If I do opt for a subohm tank, 60w puts out enough power to blow BIG clouds. Like this solid little clone by a favorite manufacturer. Opted for black and will get a vinyl wrap to coolify the little guy. I've tried most of the chipsets out there besides DNA200 and the 60w TC SXK chip is doable. It does the job in a quasi-clumsy way, but it's reliable and a good fit for the hand. For less than $60 it's a quality TC setup alternative to $150 boxes that pretty much do the same thing. I looked at the Sigelei 75w TC, the Pandora SXK 60w clone, Zero clones, Vaporflask clones, and even the VaporShark Vaporflask DNA40. And quite a few others. Settled for a familiar shape, and better than basic features until I can afford a DNA200 setup.
 
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USMCotaku

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SXK makes some quality "clones". Unfortunately I have not used my nebula or zero after my DNA 200 came. Now they are sadly awaiting for someone else to pick them up in the classifieds.


Sent from my iPhone using Tapatalk
I haven't used my nebula in a week....ever since I got the Asolo in my hands [emoji14]
But.....I'll never sell that brass beauty! It's still my favorite mod, aesthetically

Sent with one hand, the other is busy vaping
 

Csmith10

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Mar 8, 2015
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I just picked up my second Nebula because I broke the screen on my original and the temp protection is awful on the new one, it cuts in very aggressively and I can feel the vapour dramatically from off in warmth. When TC cuts you can here it pulsing the coil. My old unit is nothing at all like this so I'm wondering if the new one is faulty. The original is 010 and the new one 180.
Does anyone know what the customer service is like from 3fvape?
 

AtmizrOpin

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I just picked up my second Nebula because I broke the screen on my original and the temp protection is awful on the new one, it cuts in very aggressively and I can feel the vapour dramatically from off in warmth. When TC cuts you can here it pulsing the coil. My old unit is nothing at all like this so I'm wondering if the new one is faulty. The original is 010 and the new one 180.
Does anyone know what the customer service is like from 3fvape?
It's not faulty mine does that too. Read some of my and other people's post on it. When TC kicks in its very choppy right? That's just how SXK is doing their TC. My s/n is 138. My workaround is to set my NP setting according to the wire I'm using, set the temp 10 degrees higher than what I want and play with the wattage till I hit my wanted temp, 10 degrees less than what it's actually set to. That, for me, has made the vape more consistent.
 

TheBloke

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Yeah, this is common with SXK's TC.

@Csmith10 I'm interested though that you thought you got a much better vape with a different Nebula. Could it be that your resistance readings are not reliable with the new SXK? And/or that the builds you've so far tested have not been stable?

Check the resistance reading on your new Nebula versus other mods you have that show resistance to two decimal places, if you have one/some? And yes also check your NP setting as Atmizr said. Are you TC vaping Ni200? Try a setting of 62 first and then increase up to 69 and see if it's any better in any of that range.

Also consider trying Titanium if you haven't already, a far more accurate wire than Ni200 and much more pleasant to use all round.
 
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Csmith10

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Ok so I made a video to send to 3fvape because this new one just doesn't do TC like my original. As you can see the screen is broken on the second devise in the video which is my original but it's set to NP-40 45w 240c with 0.4mm Ti wire, exactly the same settings as the new one. I'm also certain the old one is hitting TC in the video as it always did on those settings before I broke the screen and I'm not getting burnt hits at 45w.
When TC kicks in on the new one it takes all the warmth out of the vape.
I don't get why it's so different to the original!
 

Natrium83

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Ok so I made a video to send to 3fvape because this new one just doesn't do TC like my original. As you can see the screen is broken on the second devise in the video which is my original but it's set to NP-40 45w 240c with 0.4mm Ti wire, exactly the same settings as the new one. I'm also certain the old one is hitting TC in the video as it always did on those settings before I broke the screen and I'm not getting burnt hits at 45w.
When TC kicks in on the new one it takes all the warmth out of the vape.
I don't get why it's so different to the original!


I have the same problem with my unit together with an Low Res error it brings up from time to time. Sent a video to 3fvape as well and never heard from them again in over a week now.
 

AtmizrOpin

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Ok so I made a video to send to 3fvape because this new one just doesn't do TC like my original. As you can see the screen is broken on the second devise in the video which is my original but it's set to NP-40 45w 240c with 0.4mm Ti wire, exactly the same settings as the new one. I'm also certain the old one is hitting TC in the video as it always did on those settings before I broke the screen and I'm not getting burnt hits at 45w.
When TC kicks in on the new one it takes all the warmth out of the vape.
I don't get why it's so different to the original!

It would help if you could actually see the screen of your old one. Most likely your not hitting your set temp on the old Nebula. There fore not bouncing off the TC limiter. There is no difference in how the board regulates TC whether the board is newer or older. It's just how SXK regulates TC.
 

Csmith10

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Mar 8, 2015
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Well everything seems the same except the TC, I can't do a resistance reading comparison due to the broken screen on my original sadly, but I do know the old one had the low res issue.
I didn't think these devises had resistance lock?
I've not put a whole battery though it yet as I'm still waiting to hear back from 3fvape regarding a replacement

Cheers
 

AtmizrOpin

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Yeah the old one asked for same/new coil too but I didn't think you could actually lock the resistance like the later DNA40's. I do notice the coil resistance rise on the new one while pushing the fire button which I don't remember happening on the old one?
No atty lock like the DNA devices. There is also no refinement either. It does use the initial reading for temp when asked new up same down. As for the res rising when firing that's normal. I never owned an early SXK chip, so I can't tell you if the earlier boards did that.
 
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TheBloke

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No atty lock like the DNA devices. There is also no refinement either. It does use the initial reading for temp when asked new up same down. As for the res rising when firing that's normal. I never owned an early SXK chip, so I can't tell you if the earlier boards did that.

Wow, I didn't realise until now that there's no refinement! My first gen SXK chip in the VF had it - that was the one with no New coil question. I then just assumed my others did as well, but I just tested my Zero and sure enough, no refinement. How silly! No reason at all to remove that when adding the New Coil question, and it's pretty useful to have.

Regarding resistance rising on-screen, that must have changed throughout the lifetime of the Nebula, because my one does not rise: it was the odd man out amongst my three SXKs, the other two did show the rise. I figured at the time that the difference was that it was the big-screen SXK and maybe they had decided to leave it out, but obviously they added it in later. Which is good, I like seeing it.

the newest version has resistance lock. It should ask new/same coil after standby (I think after 30 mins or 1 h or something like that) or when you change atomizers. The newest version has no low res issue.

FYI that's not normally called "resistance lock". All TC mods record the resistance when you first put the coil on, including the first gen SXKs that didn't have the New Coil question (they just assumed it was always a new coil). TC couldn't function with it.

Resistance lock, AKA atty lock, is a DNA-only* feature that is simply "disable refinement". It stops the mod adjusting the resistance of the coil automatically. A number of the DNA 40 clones have refinement (Rayn chip in Kangxin, Waidea and others; the first gen SXK chip; probably others too) but none that I've seen have resistance/atty lock.

(It's no big deal, because resistance lock is generally not a needed thing. Resistance can fluctuate because of ambient temperature changes and those should be reflected. Refinement also means that if you screw an atomizer on before it's fully cooled down, then this will be fixed over time automatically. The reason atty lock got put in by Evolv is that people who didn't understand TC (through no fault of their own; Evolv did an abysmal job explaining it) made bad builds, with Ni200 which is inherently inaccurate and unstable, and so their resistances were fluctuating all over the place and one minute they got a good vape at 400°F, then the resistance adjusted and it required 450°F. That won't happen with stable coils.)

* Actually the Joyetech EVic-VT has it as well.
 
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