Micro Coil uneven heat distribution

[TRIPDUBZ]

Hi guys,

I was curious if anybody had some insight as to what's going on here. I have a cheap igo w (problem could be solved here...) And my coil(s) exhibit a funny problem.

In this .35 dual coil build (7 wraps 26ga 1/16" diameter), there is a cold spot in the middle of one of the coils - depicted on the right. No matter how many times I heat and squeeze the thing, the cold spot prevails. This happens even if I rebuild it. Do you thing this is evidence for a flaw in the negative post? Or is there something wrong with the build?

Any advice appreciated!

 

[AzPlumber]

Does it do the same with only one coil? What battery and resistance of each coil? Asking these because you will get uneven heating if the coils are not the same resistance or the battery is not able to support low resistance dual coil.

 

[Lessifer]

Chances are there are two wraps somewhat "fused" together in the middle there. Try running a micro screwdriver along the coils a bit, or put the jig you wrapped the coil on back in and "brush" it through a few times. Should separate the coils enough to get them to fire evenly.

 

[Bassnorma]

I'm with AZ...coils in parallel must be of the same resistance..btw in case you didn't know how the parallel coil works...two 1 ohm coils in parallel give you 0.5 resistance on the build....

Do you have a multimeter to measure the ohms of each coil?

 

[TRIPDUBZ]

Thanks Lessifer. Sony vtc5. I would imagine the coils are not exactly the same. I don't measure the res of each individual coil, only the total on a standard 510 reader. Good idea AZ, I should build a single on it and see what happens.

I forgot to mention that I shorted the atty a few months ago after firing it with drill bits between both coils - if this permanent ly damaged the atty - should I just pitch it?

Thanks guys

 

[Bassnorma]

Thanks Lessifer. Sony vtc5. I would imagine the coils are not exactly the same. I don't measure the res of each individual coil, only the total on a standard 510 reader. Good idea AZ, I should build a single on it and see what happens.

I forgot to mention that I shorted the atty a few months ago after firing it with drill bits between both coils - if this permanent ly damaged the atty - should I just pitch it?

Thanks guys

I doubt you damaged it...it is just a couple of posts, no electronics involved until you add coils...if the posts are damaged somehow ( I can't see what's going on with that lower post) that is a different story.

 

[joose junkie]

did you maybe kink the wire a bit while building it? it happened to me before, and i had the same problem.
either that or

a: problem with the post

b:those two wraps fused

c:you didnt pinch them good enough after you built them (ya know, heat it and clamp it with tweezers to get those wraps snug)

or d: you have bad kanthal. (the most likely scenario)

 

[Cullin Kin]

Any way to get a more clear photo? The blurriness doesn't help a diagnosis, but the problem coil doesn't look nearly as uniform as the other. You say this continually happens though right? It's not just this coil build. If it is continually happening, I would believe it is not in the way you built the coils, but in the kanthal or atty. Who do you get your kanthal from?

Check the bottom of the screw used on that post and make sure it's clean and it can make solid contact.

 

[Bassnorma]

or d: you have bad kanthal. (the most likely scenario)

LOL...

"To get back to the warning that I received. You may take it with however many grains of salt that you wish. That the brown Kanthal that is circulating around us is not too good. It is suggested that you stay away from that. Of course it's your own trip. So be my guest, but please be advised that there is a warning on that one, ok?"
-Woodstock

How in the world is there such a thing as "bad" kanthal? There is Kanthal in a gauge and then there could possibly be Kanthal labelled as something else...Unless you crinkle it up before wrapping or re-use it, I am lost as to how Kanthal could actually be bad...

Of course I could be wrong but that sounds like a myth to me...the rest of what you said seems like good troubleshooting.

 

[joose junkie]

meaning you get a roll with an un-even gauging, usually due to shoddy manufacturing. ive had rolls of lightning vape that had 5+ feet of wire that was noticeably inconsistent towards the center of the roll.

 

[Bassnorma]

meaning you get a roll with an un-even gauging, usually due to shoddy manufacturing. ive had rolls of lightning vape that had 5+ feet of wire that was noticeably inconsistent towards the center of the roll.

RTD Vapes for the win....not sure why I did not get to abbreviate that..=/

 

[joose junkie]

i dont even usually use kanthal anymore, i stick to nichrome by vapesupply. its more consistent and it heats more evenly.

 

[TRIPDUBZ]

I only use A1 Kanthal directly from Temco. I will check with some other gauges I have as well.