Really must get to grips with TC!

[xantivenxm]

Hi guys got it, it was the resistance. Unfortunately got myself 28g wire causing high resistance coils of .5 ohms.
Made a twisted coil at .22 ohms and it's lovely now! Loving the TC.
I have just ordered my next batch of juices stepping down my nicotine to 3mg, as the 6 is now too high with such big clouds. Slowly getting to 0

[xantivenxm]

Another update! While miles better I'm still not happy. The TC mode just isn't kicking into gear and giving a nice warm vape.

Because the titanium will increase in resistance as it heats up I think it is actually still getting too high.

Thinking of getting some 24g wire and making much lower resistance coils of about .15 or even .1 ohms to ensure the temperature control is able to kick in and work properly.

At the moment I'm getting a very cool, weak vapor with little flavor and putting the temperature up helps but has to go to about 450°C or more and I got a bit of singed cotton taste but not much improvement to the vapor.

I'm missing what I like from normal kanthal coils which is when you hit your sweet spot power where the vapor comes off warm, thick, and full of flavour and you know not to fire it for too long to save your cotton and throat from a dry hit. What I am hoping is I can achieve this with the TC without fear of a dry hit because it will pull off and switch on automatically.

Just not switching it on enough for me.. just weak vapor.

[chykensa]

xantivenxm - your post almost exactly echoes my futile attempts at TC so far, and is excellently worded. I haven;t found the right Nickel build to satisfy my Kanthal vape habits, and I also find that I have to fire so high that I am singeing the cotton.
Perhaps like you I need to experiment with a much lower ohm build to enable to TC to work properly without risking a burnt dry hit!

[SteveF]

that cool vape is one of the advantages and to some a disadvantage of TC.
What power are you putting through the coil?
Temperature is the limiter but wattage controls the vapour and speed of limiting.

you should be ok with 0.22, its the base resistance that is registered as the control point and the mod uses the rise to activate TC. 5-6 turns of 0.5 will put resistance at around 0.15 and even if you space them on the tfv4 deck the legs are going to be the deciding factor. Should have no problem with the dual coil or the clapton decks.

The cool vape with poor vapour could be wicking, don't forget if you have been using it outdoors the VG is going to thicken up in the cold.

[VapingBad]

"cool vape" is not inherent with temp limiting and has little to do with the temp set, it could be:
poor airflow
poor wicking
not enough contact area between coils and wick
high resistance in the mod or atty causing the base resistance to be too high
wattage set too low

[decoy]

tbh i didnt get get much luck with tc at 1st
anything above 0.3mm ni200 just dont seem to get rocking with only 75 watts,shame as i have about 60 meters of 0.4 and 30 of 0.45
hendix wire is imo a waste of time unless you got huge power because its all conductive
what i did find thats worth a try is 0.3 ni200 wrapped in 0.2 kanthal,the kanthal wrap acts like insulation for the ni200 and you can do contact working claptons
also ive found that big build decks in your atty make life sooooooo much easier ,the ks atty has been for me my biggest success with ni200 and tc on the sig 75 (40 watts 390/420deg)

i made the huge mistake of trying to learn tc on a sub tank that i had just got, it didnt work out very well.Learn tc on a tank you all ready know how to build well

ive yet to have the joys of ss but the rx 200 should be here soon and then the fun starts all over again

[nanotm]

single coil build on the subtank rba with ni200 comes out around 0.1, but the wick is to heavy when wet and the coil deforms to touch the base causing it to drop to 0.08 every time and then gives the "too low check atty" message, on the other hand you can always get a mod that does tc with kanthal, when my bats arrive i'm going to try it out with the crius on the koopor plus 200w mod, if it works I'll stick to kanthal until I get the hang of bigger coil builds for the ni200 (I got a 75mtr roll of it off stealth vapes for £8) like a Clapton but that's for the future.

[xantivenxm]

Right I think I may have discovered an issue.

The RBA deck on the tfv4 is reading .11 ohms resistance when there is just a straight titanium wire between contact points.

Thats why the coil calculators are not working.

Even with .5mm/24g wire it still came out at .5 ohms.

I've got it to .15 with one full wrap and two half wraps one either side of the full one.

No wonder it's not quite right.. the resistance isn't coming from the coil but from the RBA deck it seems.

Not sure of the solution to this. Rebuilt it and still not right.. bah.

[SteveF]

how damned annoying !

ok, from experience... check
1)that the positive deck/post hasn't twisted on the insulator
2)that the positive is tight, screw driver through aiflow holes and gently twist
3) that the screws are actually tight or at least that the resistance doesn't change if they are tightened

[xantivenxm]

Jan 14, 2016 20:56:06 GMT SteveF said:

how damned annoying !

ok, from experience... check
1)that the positive deck/post hasn't twisted on the insulator
2)that the positive is tight, screw driver through aiflow holes and gently twist
3) that the screws are actually tight or at least that the resistance doesn't change if they are tightened

SteveF I did actually notice what looked like a funny angle on the positive post!!!

Not sure what you mean about screwdriver through the air holes to fix it. You mean at the bottom of the RBA deck?

[SteveF]

sorry, yes the positive is only a press fit, not threaded so you have to just carefully tweak it to straighten the post/block.

The insulator on mine was cracked, I assume from overtightening the positive screw and alowed the whole positive block to move.

[xantivenxm]

Jan 14, 2016 21:48:12 GMT SteveF said:

sorry, yes the positive is only a press fit, not threaded so you have to just carefully tweak it to straighten the post/block.

The insulator on mine was cracked.

Ah ok. Took mine apart and gently twisted the side on what looks like a plastic mounting platform and it's now straight with the other side.

No resistance change though.. still 0.15/16 with the single wrap coil.

>>EDIT<< now the cotton has broken in (second tank fill) it's actually vaping pretty well. Now. Have to have it cranked right up to 480°F but it's now putting out the flavour and cloud I'm looking for.

I may perhaps just be one of those people that prefers higher PG juice because of the more intense flavours than the VG juices.

[xantivenxm]

Anyone else have the tfv4 and find it also has a high resistance base?

[xantivenxm]

UPDATE!!

Just built myself a dual coil Ti, 4 wraps each, coming out at 0.14 ohms.

WOW what a difference. Turned it right down to 280°F because I'm getting good heat flux now and it's still actually a bit warm!!

I'm guessing the RBA deck although single coil in form has those long legs and big wire holes for dual coil setups.

Also I've learned more wire coverage on the cotton is a much better vape with tc. Made for low resistance high coil coverage.

Also running a higher PG juice right now so I'm hoping when I get back to higher VG it will be less harsh

More as I vape it

[nanotm]

Jan 16, 2016 17:53:17 GMT xantivenxm said:

UPDATE!!

Just built myself a dual coil Ti, 4 wraps each, coming out at 0.14 ohms.

WOW what a difference. Turned it right down to 280°F because I'm getting good heat flux now and it's still actually a bit warm!!

I'm guessing the RBA deck although single coil in form has those long legs and big wire holes for dual coil setups.

Also I've learned more wire coverage on the cotton is a much better vape with tc. Made for low resistance high coil coverage.

Also running a higher PG juice right now so I'm hoping when I get back to higher VG it will be less harsh

More as I vape it

the tfv4 has single dual and triple coil rba heads, the kit I got came with a single coil head so I also bought the triple coil head pack from GB and a dual coil head unit from amazon, chances are you got the single coil head with the kit, i'm still waiting for the triple head to arrive but see here for the single and dual coil head units





as you can see there are more air holes and juice channels and the name of the rba changes on the cover sleeve (tf-r1, tf-r2, tf-r3) depending on what its designed for I think there is also a tf-r4 but not totally sure on that last one /