I need help

[ktez71]

Thanks in advance for all the advice....I built 2 rda's the other day and neither one is working right and I can't figure it out. One is a Plume veil, 28ga dual coils, came out at .4 ohms. The other is a Mutation X, 28ga, single coil at .8 ohms. Used organic Japanese cotton to wick both. Using some good 80/20 juice at 6mg. They are both way too harsh to even think about inhaling and produce very little vapor. Using them on regulated mods and I tried lots of different settings but nothing helped. I did a couple 1.6ohm single coil builds previously on the plume veil and that worked great. What am I doing wrong? I will try to post pics later.


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[93gc40]

What Mod and what settings? You surte your mod is capable of firing sub ohm?

 

[Train2]

If you tested the ohms, and it sounds like you did, that pretty much leaves coil position, wicking, and airflow.
Show the pix, and folks will have suggestions, I'm sure!

And what volt/watt setting are you trying?

 

[havok333]

Thanks in advance for all the advice....I built 2 RDA's the other day and neither one is working right and I can't figure it out. One is a Plume veil, 28ga dual coils, came out at .4 ohms. The other is a Mutation X, 28ga, single coil at .8 ohms. Used organic Japanese cotton to wick both. Using some good 80/20 juice at 6mg. They are both way too harsh to even think about inhaling and produce very little vapor. Using them on regulated mods and I tried lots of different settings but nothing helped. I did a couple 1.6ohm single coil builds previously on the plume veil and that worked great. What am I doing wrong? I will try to post pics later.


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Sounds like you're already scorched the cotton so may as well take it out and get everything cleaned up. Once the coils are cleaned and dry, do some quick dry burns to see if you have any hotspots on your coils, or hot legs going to your posts. The coils should glow red starting from the inside and spreading outward. On your duals, both coils should glow at the same rate.

If the coils are working properly then most likely it's a problem with your wicking. You definitely don't need to stuff too much japanese cotton in your coils, but just enough to be able to slide back and forth without much resistance. Too much cotton will just choke off the wicking action, and too little cotton will not properly saturate your coils. Either one will cause the harsh taste you describe as your cotton is burned away.

When you have your coils installed, wicked, and everything all juiced up you can pulse fire them to make sure all is working before popping the top cap back on. If that doesn't help, attach pics of your build and we can possibly spot where this issue lies.

 

[ktez71]

The 2 mods these were tried in were an IPV mini and a Hana 50w clone. Yes, both can fire sub-ohm coils. We tried all different watt settings, from 10 up to 30. I fired up the coils before wicking and they do heat up evenly just as they should. I guess I will have to mess with the wicking and see what I can change with that. I will take some pics after work tonight, been a busy couple days!


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[Dissonance]

After you wick it and saturate the wicks, with the top cap off fire the coil for a while. If you just saturated the wicks, give it a couple fires to make sure there isn't juice left over on the coils that didn't come from the wick (since that's what we need to test). Once it looks like all the juice is coming from the wick, fire and hold for ~ 5 seconds. If you see anything glow, or if vapor started strong then tapers off in a certain area, then there's your problem. If it's glowing from an edge, you probably have a hot spot or need to put more wick in that area. If it's coming from the center, it could be one of three things. You have too much wick and it's choking the juice flow, you have too little wick and it isn't making contact all the way around the coil, or your coil is too small (diameter wise) and the coil is drying the wick instantly. Remember there should be JUST enough wick to touch the coil the whole way around when juice is applied (And with cotton, that means leaving a 'lil room for it to expand). Use this to figure out which one the problem is, then fix it Oh, also keep an eye on the actual post holes... Sometimes clipped leads short out, and while the coils are working great on the other side there's a glowing red nub against the post burning any juice that happens to be in the vicinity.

Not to discourage information being shared here, but if you can find a half hour or so out of your day to stop by a knowledgeable B&M they can help you a lot more than we'll be able to since they can see hands on what it's doing and why it's harsh (Or if it is harsh, you mentioned you were using a 1.6Ω coil prior so it may just be more vapor, especially if you're using juice with nic).

 

[ktez71]

Thank you for all the helpful advice....I actually was planning to stop at the local B&M to get some help but I have not had a chance to get there and probably won't for a few days. It probably is the wick, I will have to try some different thing.
And to Dissonance....that is the weird thing, it is actually LESS vapor that what I got with the 1.6ohm coil, and that is part of the reason I'm puzzled.

 

[nocigsnomore]

Sounds like you're already scorched the cotton so may as well take it out and get everything cleaned up. Once the coils are cleaned and dry, do some quick dry burns to see if you have any hotspots on your coils, or hot legs going to your posts.

When I clean my coil(s) I dry burn it after rinsing. Is that ok?

 

[ktez71]

I always do too...gets the gunk off the coils. Just make sure it's dry before you put it on your mod to dry burn it

 

[havok333]

When I clean my coil(s) I dry burn it after rinsing. Is that ok?

Sure thing. You can even repeat the cycle for particularly cruddy coils...whatever it takes to get them looking like new again.

 

[nocigsnomore]

Thanks! Great.

 

[ktez71]

Ok here are some pics...1st pic dual coil is the plume veil (yes, I know it's dry but I haven't used it in a couple days) and the single coil(2nd pic) is the mutation x. Any thoughts? View attachment 403598


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[MattyTny]

I'm not as experienced as some of the other members here, but for a target resistance range of 0.4-0.8 or anything going toward he lower end you should consider a lower gauge wire like 24 or 26. You'll be able to get more coil to wick contact for a good vape. Use the Steam Engine vaping calculators available online to create possible builds.

From the picture it looks like your coils can be moved out father on the deck. This lets the incoming air hit the coils better. If the coils aren't getting the proper airflow the vape could come off as harsh.

 

[BobC]

You're using cotton, and it looks like way too much

 

[ktez71]

Thanks! I will try both of those suggestions!


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[ktez71]

So I took a good look at my 2 builds again and you guys nailed it - too much cotton. I had it under the coil and I guess it wasn't getting enough airflow. Trimmed back the cotton, made sure it wasn't under the coil, and awesome!


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