Ongoing Battle with the Cobra RBA

[wizardelite]

I've had my Cobra Genesis Style Atomizer for over a month now and I still have yet to get it to work properly and I have no idea what I'm doing wrong.

Instead of writing out a long drawn out entry. I created a 5 minute video outlining my issues.

I would be greatly appreciated if you could watch the video and possibly tell me what I'm doing wrong.

Thanks!

 

[Jaseruckus]

It's hard to tell but it looks like your wick is too thick, are you able to wiggle it a little? The cobra has a small wick hole so the wicks will be allot smaller than most atty's. I can tell right away it's not wicking enough liquid to compensate with the heat. Also you got to make sure the top coil is closer to the center post a little and that it's wrapped counter clock wise on the center post. It helps if to kink the top coil a little where its touching as much of the wick leading to the post.

If your having to tilt it that much in order to get liquid to your wick, it's wick issues your having. Just holding it at 2'oclock-3'oclock should be enough where liquid will start dripping off the wick. Also remember that the wick hole is not insulated, so if your wick is not fully oxidized where it's going through the wick hole, it will cause hotspots. That's why it's better to make sure the wick is hardly touching any part of the wick hole. I use the supplied hex tool that came with my cobra for doing the drill method. It's small enough to make sure when you put your wick in it, it is almost completely center of the hole.

Also before when I first started with gen atty's, my wick would flame up like that. Now it never flames up like that because I fully oxidized and burn juice with a lighter before I insert it. I also drip juice on it a few times and let it burn it dry around 3 times to make sure that there are no hotspots, sometimes it's hard to tell if a coil is heating up too fast. If you drip juice on it and one coil glows even if juice is in it then it's a hotspot. It's better to find your hotspots this way than having to constantly refill and taking out your juice all the time.

 

[Kevin Brown]

he isnt having a hotspot problem those coils are toooooo red rfol
3.7 @ .06 is awesome if your a flame eater
I call it hellfire because you may be checking out satans realm of fun
that would burn your lungs and could instant deathly occurs
if i did the greater math (im not) you could heat a small area with that coil on a mech

my reply is ya need a 8/7 9/8 coiler with lifting bends at base and center post to get it to 1.4-2.0 ohms for best experience

imo on a mechanical best 2.2-2.4

you could put a led it there and have a cool effects
dropping current a bit
that cobra is absolutely badarse
they really are dangerous

exxxxxcellent post you get an award

 

[Kevin Brown]

btw great advice on wick
run a strand of silica down the center
it will wick and wick
add a sized dummy wick in fill hole
when swap is needed
thread out gunked wick boil it insert already sized dummy wick
after boil use old wick as dummy wick repeat threading when coil wick gunks again
4 wick surfaces already prepared and wicked i use a paper towel carefully
to remove dummy wick and tweezers to thread if difficult
dry burning will crumble a wick thats gunked
boiling does not
i use distil microwaved water with hydrogen; rinse w/ distil

then make great video, "lets talk about flavor its a wowzer"

 

[Jaseruckus]

Here's 2 pics of my current coil: 400 ss mesh, 28 awg kanthal,and 0.6 ohms on a mechanical.



I know it's a pain setting up the Cobra at first, but once you get it running right, it's a great gen atty.

 

[Kevin Brown]

I think you guys are not understanding how a duel coil works
even though it a sub ohm coil its still is 3.4 ohm etc coil
exxxxxcellllllent ataste and vapor on duels but they have to be exactly the same ohms

EEEEEEXACTLY
the rule is "no two resistors in a circuit"'
its a cheat

 

[albcig]

my humble suggestions: go for a higher resistance coil and experiment with wicking. thiner liquid, perhaps a 400 mesh.

 

[SteamDaddy]

I think you guys are not understanding how a duel coil works
even though it a sub ohm coil its still is 3.4 ohm etc coil
exxxxxcellllllent ataste and vapor on duels but they have to be exactly the same ohms

EEEEEEXACTLY
the rule is "no two resistors in a circuit"'
its a cheat

led = resistance
you have a pic of your setup with the led lit up ?

 

[CountSmackula]

A .6Ω coil w/ a freshly charged battery puts you @ 28-29W. I don't know if you're using a high VG juice or not, but you're outrunning your wick's ability to feed. You might try either a solid wick or a U-wick to improve your wicking.

I use a solid wick, #500 mesh, 45mm x 70mm. I don't cut @ a 45 angle on the bottom. When I roll the wick, I let the center poke out a bit (it results in sort of conical shape). I usually wrap a 1.6Ω coil of 30ga Kanthal & run it @ 4.0-4.2V which is only 10-11W.

p.s. When you can't stand the frustration any more, just send it on to me. I'll give it a good home.

 

[Kevin Brown]

led = resistance
you have a pic of your setup with the led lit up ?

leds do not add resistance its an infinite diode
lol

 

[Kevin Brown]

lol now i have to add one i have a clear drip tip too woot awesome idea
steamdaddy

 

[Blix]

he isnt having a hotspot problem those coils are toooooo red rfol
3.7 @ .06 is awesome if your a flame eater
I call it hellfire because you may be checking out satans realm of fun
that would burn your lungs and could instant deathly occurs
if i did the greater math (im not) you could heat a small area with that coil on a mech

my reply is ya need a 8/7 9/8 coiler with lifting bends at base and center post to get it to 1.4-2.0 ohms for best experience

imo on a mechanical best 2.2-2.4

you could put a led it there and have a cool effects
dropping current a bit
that cobra is absolutely badarse
they really are dangerous

exxxxxcellent post you get an award

btw great advice on wick
run a strand of silica down the center
it will wick and wick
add a sized dummy wick in fill hole
when swap is needed
thread out gunked wick boil it insert already sized dummy wick
after boil use old wick as dummy wick repeat threading when coil wick gunks again
4 wick surfaces already prepared and wicked i use a paper towel carefully
to remove dummy wick and tweezers to thread if difficult
dry burning will crumble a wick thats gunked
boiling does not
i use distil microwaved water with hydrogen; rinse w/ distil

then make great video, "lets talk about flavor its a wowzer"

I think you guys are not understanding how a duel coil works
even though it a sub ohm coil its still is 3.4 ohm etc coil
exxxxxcellllllent ataste and vapor on duels but they have to be exactly the same ohms

EEEEEEXACTLY
the rule is "no two resistors in a circuit"'
its a cheat

You sound quite confused, have you even tried a Cobra on a mechanical mod? 2.2-2.4 ohms best on a mechanical, really? You make no sense. Nobody talked about dual coils here either.



wizardelite, your setup is quite similar to mine, I run 4 wraps of Kanthal 28 as my standard setup on my Cobra, usually comes in at 0.7-0.8 ohms. My wicks are rolled by hand, no pin used for hole in the middle, I use a piece of 500 mesh around 2-3 cm wide. I also cut it at an angle at the bottom.
And it works great every time. I wrap my coil on the supplied tool and get it going by pulsing, just like you.
I think you need to try different methods of rolling your mesh, it's there your problem lies.

 

[Kevin Brown]

The one that doesn't know what he is talking about is obviously you. You have little to no experience with genesis, so what are you even bothering to troll here?

1+1=3

yeah they do it differently each atomizer has changed the laws of physics in fluid dynamics and become favorites but

guess what the electrics dont change

try my suggestion on a mech i guarantee ya a great experience

 

[aPandaz]

I was having a problem with wicking on my Cobra as well. When I went into my local B&M one of the guys showed my his build and suggested I shorten the wick. I still have to tilt but it's working nicely. I made a video last wick showing the shortened wick and the need to tilt. In my next build I'm going to try a U-wick. Here's my video for you to see what I'm talking about.

 

[Kevin Brown]

^ this
I was gonna offer he could halve his wick -- less is more in this non dripping setup
fluid dynamics again
the fluid becomes too heavy to wick properly
heck he could make 4or 5 wicks for a cobra out of that one wick
but thats my secret sauce, ut oh now i have no personal panty puller
damn

 

[aPandaz]

he isnt having a hotspot problem those coils are toooooo red rfol
3.7 @ .06 is awesome if your a flame eater
I call it hellfire because you may be checking out satans realm of fun
that would burn your lungs and could instant deathly occurs
if i did the greater math (im not) you could heat a small area with that coil on a mech

my reply is ya need a 8/7 9/8 coiler with lifting bends at base and center post to get it to 1.4-2.0 ohms for best experience

imo on a mechanical best 2.2-2.4

you could put a led it there and have a cool effects
dropping current a bit
that cobra is absolutely badarse
they really are dangerous

exxxxxcellent post you get an award

Everyone's experience is subjective. You may find a 2.4ohm coil your best experience, but not everyone will. I started at 1.8...once my battery hit 3.8v, I didn't like it. I run my genesis atty's at 0.8 ohm single coil and my dripping atty's with 0.8ohm dual coils. Flavor is excellent IMO with my setups.

 

[Kevin Brown]

Everyone's experience is subjective. You may find a 2.4ohm coil your best experience, but not everyone will. I started at 1.8...once my battery hit 3.8v, I didn't like it. I run my genesis atty's at 0.8 ohm single coil and my dripping atty's with 0.8ohm dual coils. Flavor is excellent IMO with my setups.

Safety is not subjective youngster
this is not rocket science you have been misinformed
in my industry we cannot be off a micro-millimeter
this is hilarious

your dual setup is not .8 ohms
its measures on your device as that but its not
i wont tell ya what it is because it makes for humors
you have to do the maths to get to .8ohms
not use a series measuring unit

oh well people do crack and bomb other people thinking to themselves its subjective
its a simple electrical connection not even considered electronics
heat is heat

 

[Kevin Brown]

One last post and I rest it

if you havent had the sweetness of any juice blow you away
the flavors pop like they were poured into your mouth at its source
i already know you havent 1.8 coil @3.5 is perfect compromise 3.0-3.3 less vapor more flavor so you have to sacrifice
on a well sorted set-up the sweetness of even basic vg or pg juice is so overwhelming
you do not need flavoring

what is not understood is that top coils should never be stressed
if you make a proper coil it will last your great great grandkids lifetime
think of electric floorboard heaters they are the same identical setup we vape with and they last how long?
well the good ones lol

 

[jonjay]

I was having the same issues. IDENTICAL for DAYS. I didn't understand it. But here is what I concluded and wound up doing, and now it is flawless. It was already mentioned, your wick is WAY too thick, first thing I noticed.

I would also drop it a little more down into the tank, yes, like you mentioned not so it's touching the bottom but thats awful high. And also, the hole in the middle of that wick seems large too.. Just tighten that baby up again, potentially recoil it and give it another shot.

I'm running at about 1.2 ohms on my mech mod 30awg kanthal a1 with the cobra and its legit now. I also bore out the air hole a little to 1/16" (mind you, it's a clone) so I think it's smaller then on the legit one.

Good luck!

 

[wizardelite]

It's hard to tell but it looks like your wick is too thick, are you able to wiggle it a little? The cobra has a small wick hole so the wicks will be allot smaller than most atty's. I can tell right away it's not wicking enough liquid to compensate with the heat. Also you got to make sure the top coil is closer to the center post a little and that it's wrapped counter clock wise on the center post. It helps if to kink the top coil a little where its touching as much of the wick leading to the post.

If your having to tilt it that much in order to get liquid to your wick, it's wick issues your having. Just holding it at 2'oclock-3'oclock should be enough where liquid will start dripping off the wick. Also remember that the wick hole is not insulated, so if your wick is not fully oxidized where it's going through the wick hole, it will cause hotspots. That's why it's better to make sure the wick is hardly touching any part of the wick hole. I use the supplied hex tool that came with my cobra for doing the drill method. It's small enough to make sure when you put your wick in it, it is almost completely center of the hole.

Also before when I first started with gen atty's, my wick would flame up like that. Now it never flames up like that because I fully oxidized and burn juice with a lighter before I insert it. I also drip juice on it a few times and let it burn it dry around 3 times to make sure that there are no hotspots, sometimes it's hard to tell if a coil is heating up too fast. If you drip juice on it and one coil glows even if juice is in it then it's a hotspot. It's better to find your hotspots this way than having to constantly refill and taking out your juice all the time.

Greatly appreciate your advice. I'm just going through all of the replies and I'm going to give this another shot.