RDA Can't get the coils right for 3 post RDA....frustrated!!!

[Shade42]

Trying to learn coil building on an rda. Having some issues I can't wrap my head around. First I tried with 30 gauge kanthal, was experimenting with about 7 wraps. then with 12. A few days later started trying with 26 gauge.

When builiding a coil where the wraps touch
-- I think it "shorts out" because it just sort of dies after a few puffs. I do the quick pulse to check that it's heating from the middle.
Does the coil touching the posts accidentally make this happen?


When building a coil with space between the wraps.
-- Seems to work, BUT....the juice spits and sputters and otherwise scares the crap out of me. I turn it down, same thing.

I'm using an EHPro Nimbus v3 with three posts, on a VV. I don't care about sub ohm (would rather not in fact) just want to learn how to drip. I've watched tons of Youtube vids but somehow keep screwing it up. Suggestions?

 

[2naphish]

microcoils....try it, they should be tight to one another. also the height in relation to your airholes is critical. i like mine coming in just a little to the underside of the coil. hope this helps.

 

[sedition]

Post some pics so we can have a look.

 

[Shade42]

So this one I had the same issue. I tested it, it sputtered (quick streams of vapor shooting up)....then the display on my VV says "locked." The coil isn't dead because I was able to unlock (turned VV back on) and try it again. It's that sharp crackle that is driving me nuts mostly.

What am I doing wrong? Too much juice? Cotton too tight? Holding button down too long? What causes this sputter and die thing? (Forgive my lack of lingo.)


2naphish, I had trouble with the microcoils-- couldn't get them lined up closely enough so I started doing the other kind (space between.)

 

[Podunk Steam]

From my understanding a lot of the crackling and popping comes from the wick being too loose through the coil although you may be at a very low ohms resistance causing you both of your issues.
Do you know what your ohms resistance is with what looks to be your 26 gauge coil in the picture? I'd guess it is too low for your VV mod as you call it to fire on. What type of mod is it?

 

[93gc40]

spitting and sputtering is a by product of BOILING liquids. You can reduce it to a sizzle, with a well wicked coil. For what it worth the only time my Kayfun spits in when it has sat for a bit, and the wick is extra wet. OR when the battery is getting low.

What are the ohms of you coil? What ohm are you trying for? have you studied Baditude or stateofflux blogs or Steam Engine | free vaping calculators.

 

[Ren76]

You mentioned coils touching the posts, only your leads should be touching the posts.

 

[ElConquistador]

Pull your coil out towards the edge a little bit, closer to the air hole.

 

[Shade42]

The ohm reading was .5 and I think you are right, the VV doesn't dig it. .5 is the lowest allowed on this particular mod, so I'm thinking it must have fluctuated lower? It kept locking up.

I trimmed the extra wick after I took this pic, and that seemed to help with the sputtering. I will try placing the coil closer to the air hole, but the sputtering I referred to was happening with the cap off when I was testing it.

Yes it is 26 gauge. I also have some 30. How do I make a higher resistance coil? Do I have to do macro coils? What happens if the lead is too long (far away from the posts?)

(Again, I don't have a preference about the ohm resistance, just trying to learn building/dripping here.)

Thank you everyone for the advice/observations. Much appreciated. Will post another pic next attempt.

 

[edyle]

use the steam engine coil calculator to help wrap your coil

Coil wrapping | Steam Engine | free vaping calculators

Kanthal A1
gauge ----- watt per ohm (per coil) for 200mW/mm2
34 ----- 1.4
32 ----- 3
30 ----- 6
28 ----- 10
26 ----- 23
24 ----- 45
22 ----- 91
20 ----- 182

Coil wrapping | Steam Engine | free vaping calculators

Current might be a more intuitive way of thinking about it.

gauge ----- current (Amps) for 200mW/mm2
34 ----- 1.2
32 ----- 1.7
30 ----- 2.4
28 ----- 3
26 ----- 5
24 ----- 7
22 ----- 10
20 ----- 13

 

[edyle]

View attachment 424652

So this one I had the same issue. I tested it, it sputtered (quick streams of vapor shooting up)....then the display on my VV says "locked." The coil isn't dead because I was able to unlock (turned VV back on) and try it again. It's that sharp crackle that is driving me nuts mostly.

What am I doing wrong? Too much juice? Cotton too tight? Holding button down too long? What causes this sputter and die thing? (Forgive my lack of lingo.)


2naphish, I had trouble with the microcoils-- couldn't get them lined up closely enough so I started doing the other kind (space between.)

that's only 4 wraps; try 7

 

[Shade42]

I followed the interactive chart on Steam Engine and it seems to be working now. Clocked in at 1.4 ohms. Woot woot!

Still kinda "sizzling" but not in a scary way.

Thank you all. I'm certain don't I'll be back with more questions/concerns later!!! (Not pessimistic just inevitable!)

 

[martinc]

Well,you must be the only one rolling with coils like that in rdas

Here is something for your arsenal: (dont be scared,check one day,come and recheck the next week,it`ll grow in ya!)

https://www.youtube.com/user/manofaction2828/videos

https://www.youtube.com/watch?v=lvMzjad5mfY

https://www.youtube.com/user/RiPTrippers/videos

P.S.

New coils always pop sizzle

 

[Shade42]

Baby steps, Martinc, baby steps!

 

[Jab9920]

15162998 Check out this video helped me out quite a bit lots of great info in http://www.e-cigarette-forum.com/forum/showpost.php?p=15162998

 

[frjaldomr]

Man, I know about the scary...
I've been building for about two months. My first build was a tri coil on an Onslaught clone, and I'm using mechs.
I've done tons of research, watched lots of vids, listened to and followed all the advice from the veterans...
But it's still scary as heck the first time you fire that thing up.
I now own three RDAs, and I'm becoming a lot more comfortable with my builds...but I still take it slow.
Btw, all my builds sputter a bit...seems like they all do, in the vids I've seen.

 

[alicewonderland]

good coils crack n sizzle. It's all due to the coils getting the juice it needs. Too much though usually mean its oversaturated. locking or shorts on a VV/VW device usually means your coil other than the leads are touching the topcap or posts, it might also happen after heating up a coil and the screws become lose, so make sure to tighten em down again after you put in your coil and test fire it, always test fire it without wicking to make sure it heats up evenly and you have no shorts, re-tighten the screws again then wick it once you like the result.

 

[ArturHoldTheH]

I made my build just a little over 1 ohm for my vv/vw mod I did ten wraps tightly together with 28g

 

[martinc]

Which is a good thing; you don't need to go 0.01 to get an awesome vape!

For duals I go 10 to 12 wraps of 26 kanthal which comes out to about 0.8 ohm and only pass the cotton through leaving the underside free to produce as much vapor as it can just the 2 tails dangling to the bottom of the well on each coils; it just go shhhhshhhshh and not scary at all

The only good side to very low ohm is that the coils heats up right NOW where the upper part of the subohm takes a lil while

My take on this is over 1 ohm for RTAs and under 1 ohm for RDAs but not by much in either cases (personal pref)

 

[Biskotheque]

My take on this is over 1 ohm for RTAs and under 1 ohm for RDAs but not by much in either cases (personal pref)

That's pretty much where I'm at at the moment as well, just started playing with RDAs this week, and I looooooooove it.