Tips and tricks to building a better dual coil?

[Mrez]

I've been building on RDA's for about a month now, and a kayfun for 2 months or so. The kayfun rarely gives me any problems, but the RDAs are a pain in the rear. I cannot seem to get my dual coils firing evenly. I poke, prod, pray, swear, lift, spread, tuck, drop and maybe just maybe I'll get them firing evenly...for about two or three chain vape sessions, and then when I pop the top, always one side of the cotton is dried out and the other side still has a puff or three left. It's aggrivating, and I dam well had a near short messing around with it today (bottom button got hot). I suspect part of the issue is the quality of the clones. My magma is a bit easier then my tobh, which is a bit easier then my plume, which is a pain. It won't accept anything larger then a 28 gauge, and those have to be twisted around the screw instead of through the positive posts..

So..anyone got any good tips, or failing that good prayers?

 

[DesmondTheMoonbear]

The best advice i could give is to get all the tightening done at the wrapping stage. the more work you do there, the less youll have to do when theyre instaled.
another thing that i wish someone had mentioned when i started building is ,after you install the coils and fire them up to glowing, take your screw driver and just give all your post screws one more little twist.
when the kanthal gets hot, it gets soft and can lose proper connection with the posts and can cause unevenness int he firing and even shorts. i check mine two or three times a day on my tobh and theres always one screw that could be juuuuust a little tighter.

 

[Wraith504]

drill out your post holes if you cant get anything thicker than 28 in there. wrap the coils nice n tight on whatever mandrel/screwdriver etc. you are using. after you get them in your posts and tightened down, meter the atty to make sure you have no short and your resistance is safe. If all is within safe specs, put it on the mod fire it up and compress the coils together with some tweezers or mini needle nose, let them cool test fire again and repeat until coils fire from center outward.

 

[Wraith504]

I would also venture to say that you are probably over wicking a bit which is a common rookie mistake on drippers. Try using less wicking and see if that helps. Pics of your builds and wicks would help as well.

 

[danca90]

Try macro coils for a while. It's a little easier, I think.

 

[funkfist]

Make double sure both coils are the same number of wraps, try to keep your legs the same length from positive and negative, tightness when you're doing your wraps is very important, make sure you're not using more wicking material on one coil and if it's still causing trouble I'm out of ideas.

 

[danca90]

Make double sure both coils are the same number of wraps, try to keep your legs the same length from positive and negative, tightness when you're doing your wraps is very important, make sure you're not using more wicking material on one coil and if it's still causing trouble I'm out of ideas.

I found it easier to keep one leg a little longer so it's easier to run through the posts, and I angle them up a little.

 

[keepsmiling]

Good thread.

 

[funkfist]

I found it easier to keep one leg a little longer so it's easier to run through the posts, and I angle them up a little.

When you tighten everything down make sure the legs from your positive post to your coil is the same distance on both coils and the legs leading to the negative are the same length. Sorry for any confusion

 

[nynvolt]

After I've installed, metered, got them positioned and tug them with my bit in the coil. I start to pulse. Just a bit at a time until both full coils are lighting up. Then I re-tighten screws, re-center and compress. I then light them a few times until they no longer smoke. Re-tighten the screws. Light them up one last time to ensure they fire evenly then dunk them while still glowing into water. Of course just dip, keeping your mod dry and do not fire while quenching. After that they seem to stay put and the rest is up to your wicking.

For wicking I get best results leaving just enough wick to wrap under the coil but leaving open the space under the coil.

I keep the deck pretty much exposed. The only problem I have with this method is the juice can spill out but it seems to wick way better than having a cotton stuffed base.

 

[ace077]

Make sure your screws are nice and tight always, and run your leads entirely through each post and fold up and trim them AFTER tightening. If you trim your leads so short they only go halfway in one of the posts you're begging for
Connection mishaps.


Sent from my Fuego

 

[ace077]

After I've installed, metered, got them positioned and tug them with my bit in the coil. I start to pulse. Just a bit at a time until both full coils are lighting up. Then I re-tighten screws, re-center and compress. I then light them a few times until they no longer smoke. Re-tighten the screws. Light them up one last time to ensure they fire evenly then dunk them while still glowing into water. Of course just dip, keeping your mod dry and do not fire while quenching. After that they seem to stay put and the rest is up to your wicking.

For wicking I get best results leaving just enough wick to wrap under the coil but leaving open the space under the coil.

I keep the deck pretty much exposed. The only problem I have with this method is the juice can spill out but it seems to wick way better than having a cotton stuffed base.

Why quench your coils? Just curious.


Sent from my Fuego

 

[nynvolt]

In my mind, it cleans and helps stiffen them up. No idea if it works but I think it does.

 

[ace077]

Does it affect your ohm load at all?


Sent from my Fuego

 

[nynvolt]

No, once they are secured they meter the same. I always check after I've wicked, juiced and capped to be sure everything is good to go and unless a screw is loose they meter the same.

 

[ace077]

I'm definitely quenching the coils on my stillare next time i build it. Thanks for
The idea


Sent from my Fuego