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Ah, he'd said he had a faulty one but I didn't realise it was quite so exactly the same problem, that's really interesting, cheers charliehorse.

That makes me more inclined to try and arrange a replacement, TBH, but I think I'll maybe wait till the VTC mini arrives.

Yeah I've used the screw heads rather than post holes on the other atties I've tried building on (Lemo 2 and TFV4), but with the Bellus the posts are quite high and I'm not sure it'd really work, bit leggy...

Thanks anyway mate, it's a total bloody mystery to me, and I don't know enough to know what I might be missing.

But my basic thought is, leaving aside functionality when actually vaping, all that should have to happen here is that the resistance needs to be high enough for the mod (which it is) and locked in at room temperature to give a starting point (yep), the coil not touching the deck anywhere stupid to cause a short (all good). Then the mod should be able to detect the resistance change as the temperature changes and adjust to regulate.

If it's doing that when fully built and juiced why should the same not apply when dry... the temperature is still changing (and so the resistance)... I suppose it could be happening quicker when dry and without the airflow caused by vaping, but I'd doubt that would be significant enough to prevent the chip from keeping track...

Nah, I'm clueless It clearly doesn't happen in all cases, the vid you posted shows that, so effectively my mod is faulty, but only if I try to test it, not when I actually use it.

My only real concern is that if I run a tank dry I'm going to end up dry hitting, not a huge issue but removing one of the benefits of TC.

Ever wish you'd never started something?

Cheers VapingBad, there's a big difference in vapour production between 300F and 420F, so guess that confirms it's working OK.

Just no idea why not when no juice in, but maybe I should just let that go

It's a Bellus robby, there are no air holes in the build deck, the airflow is direct in through the side of the tank once this part plugs into the bottom (I may not have explained that very well!). I've found a picture which may help:



The hole on the other side is where the single coil adapter plugs in to close off the juice and air flow on the other side, like a Goblin Mini if you've got one of them?

Just to further confuse matters, I've just tried a scorch test using the TFV4 that I was vaping with last night... with juice in the tank last night the temperature control was definitely working, with the same coil today, just with cotton in, it's not kicking in again, the voltage isn't modulating and the cotton is scorching at temperature settings far below what it should.

I've been using this Sig all day with a Lemo 2 coiled with nickel, and the TC has definitely been working.

So, works with juice in, doesn't without. That's the only conclusion I'm able to draw at the moment.

Bloody physics!

Hi robby, 0.12 ohms, 8 wraps of 0.28mm nickel, 2.5 ID.

Tried taking a photo but can't suppress the flash on my stoopid phone, I'll try and stick one on after work tomorrow.

Stop the clock, think I've identified the problem... I've just put my TFV4 on the Sig and gone for a vape, that has the nickel coil in from my first experiments the other day and when I'm firing that the voltage is modulating.

So, it must be the build, even though it looks fine to me, there must be something wrong... I used the post holes, so maybe I've screwed it in too tight or something?

I'm going to start again and see what happens.