Busting the "top hot spot" myth

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Hello World

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Really, this AGA top hot spot business really has my knickers in a knot! It has nothing to do with the distance between the wick and the positive post. Its about the tension, man! Some of my vertical ss mesh setups have had this "hot leg" issue, but it always proves to be that my top wrap is too tight; right before the wire leaves the wick. (In fact, every hot spot i've ever had is immediately above a tight area on my wrap, or is a coil that is way too loose.) Relieve some tension by turning both trapping nuts on the positive post in the appropriate direction and then redistribute/equalize tension between coils by picking/brushing. The last thing you want to do is to try and bring the wick closer to the post by dragging it over there with the top coil! . . . . Really! (I say all this with tough LOVE ;))
You can also use a Dental Scaler to adjust the tension for any of the coils to get them all up and shining in no time at all.
 

SteveW

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You can also use a Dental Scaler to adjust the tension for any of the coils to get them all up and shining in no time at all.

A dental scaler? Now here is someone who takes his craft very seriously. What a great idea! Heading over to eBay now to get me one of these. Certainly better than toothpics and blunts for precision adjustments.
 

dam718

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You can also use a Dental Scaler to adjust the tension for any of the coils to get them all up and shining in no time at all.

Why in the name of all that is good and wholesome would they ever sell this at Wal Mart? LoL I hardly trust my dentist to put these in my mouth, much less me try to do it to myself or worse still try to use it on someone else!

Alright folks, you heard it here first... Do NOT try to use a dental scaler in your own mouth! And don't be sticking one in anyone elses mouth either unless you are a trained DMD!

Just sayin :) Freakin Wal Mart... Silly people from Arkansas...
 

Hello World

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Why in the name of all that is good and wholesome would they ever sell this at Wal Mart? LoL I hardly trust my dentist to put these in my mouth, much less me try to do it to myself or worse still try to use it on someone else!

Alright folks, you heard it here first... Do NOT try to use a dental scaler in your own mouth! And don't be sticking one in anyone elses mouth either unless you are a trained DMD!

Just sayin :) Freakin Wal Mart... Silly people from Arkansas...
I have found the coils stay lit ... no readjustment even 10 days later ... they all light up on the first pulse ... good vape every time I fire. You can hook right in between the coil and mesh to move it any which way you like.
 

Gimpy1261

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Thank You OP!!!!!!!!!!!!
Ya'll argue some more. I just found this thread 30 min ago. I was looking for some way to stop my top leg from glowing red. Been working trying to get a working coil and wick since Jan - 25. I done read all The threads I can find on this subject and don't remember this ever being mentioned.
Any way HOOOOOOra I finally got one working after just letting the top leg kinda just stretch across from the wick to pos post. Hope it last awhile cause I wuz fixing to trash can this thing. OP saved me what ever it was COV cost me fur this AGA T I think cause it has a glass tank. and I was fixing to chunk it.
 

StaircaseWit

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Hope it last awhile cause I wuz fixing to trash can this thing. OP saved me what ever it was COV cost me fur this AGA T I think cause it has a glass tank. and I was fixing to chunk it.

There's quite a few people who would love to have a $25 RBA for the cost of shipping. Consider your fellow vapers next time you're about to toss a piece of hardware.
 

budynbuick

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YEAH! (says OP, me) Somebody actually just read it, and then tried it! WOW! Nice job Gimpy1261! You're one in a million. (Any more imaginings to share Starik?)

heck,I thought this was self evident. It just seemed the 'natural' thing to do. Must be why I don't normally get hotspots. Just did it that way as a matter of course. Cool.
 

NoGuff

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Cooling the wire down with liquid does not add to the resistance or block the flow of electrons through the wire. Heat is not resistance but a product of.

I get that.

But let's say you wrap a wick properly and the path of least resistance follows the wire all the way from where the coil touches the negative post to where it touches the positive post. Then you fill your atty with juice. Your wick is wicking as a wick should.

You fire.

Electricity is flowing through the wire, making it hot. It WANTS TO GLOW its so hot. But it can't do that! There's all this damned e liquid in the way soaking up the heat! But at the top, OH at the delicious TOP, there's this arid wasteland... no moisture may set foot here. And it is here that the coil shall GLOW!!!!

Or am I imagining it wrong?
 

Starik

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Cooling the wire down with liquid does not add to the resistance or block the flow of electrons through the wire. Heat is not resistance but a product of.

Cooling the wire down with liquid reduces the temperature of the wire. The glowyness of the wire is directly related to temperature.

In other words, in a place where heat is not being dissipated by turning liquid into gas, the wire will get hot. The same amount of electricity is flowing through the wire at the wick-pos.post bridge as is flowing through the wire at any segment of equivalent length along the coiled part.
 
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NoGuff

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Cooling the wire down with liquid reduces the temperature of the wire. The glowyness of the wire is directly related to temperature.

In other words, in a place where heat is not being dissipated by turning liquid into gas, the wire will get hot. The same amount of electricity is flowing through the wire at the wick-pos.post bridge as is flowing through the wire at any segment of equivalent length along the coiled part.

Correct. But cooling the wire will not add resistance or cause a short. Therefore the wire (legs) that has no liquid does not get any hotter.
 
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pdib

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Yes indeed, the heat (energy) generated in the wire by the collision of electrons with nuclei ("resistance" to the flow of said electrons) is then (conserved) but transferred to the changing of liquid into steam; thus, vaping. The electrons which are moving along the wire take some time/distance of travel before a sufficient number of them collide with nuclei to generate sufficient heat to, say, glow, or generate steam for that matter. If you look at any glowing coil (see previous picture, or do an image search), you will note that the ends don't glow, and furthermore, that the center glows brightest. The only way to change this pattern is to interfere with the flow of electrons in some other way; say, for example, wrapping it too tightly around a tube of stainless steel mesh.
 

jasl90

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Sounds like science time...Here's a fairly easy experiment to prove that your coil heats from the center and that the legs don't glow on a good coil...
ImageUploadedByTapatalk1361417686.970841.jpg

This is just a straight piece of 28awg Kanthal A-1 and a couple of alligator clips connected to a power supply (a Provari in this case).
This removes any variables such as coil spacing, e liquid and shorts...

Notice that while the center is glowing red, the wire closest to the clips is not.
 

Starik

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Think of it as a sidewalk full of angry midgets (midgets are electrons). The midgets walk down the sidewalk, and every 2 seconds, each midget has an uncontrollable urge to punch a lightpost (the lightpost is the wire). If there is e liquid in the lightpost, the punch simply turns the e liquid into vapor. If the lightpost is empty, the lightpost bulb glows.

The part of the street passing through Downtown Wickville has lightposts being constantly restocked with e liquid. The bridge from Wickville to Positivepostown has lightposts with no e liquid ever.
 

Starik

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Sounds like science time...Here's a fairly easy experiment to prove that your coil heats from the center and that the legs don't glow on a good coil...
View attachment 180444

This is just a straight piece of 28awg Kanthal A-1 and a couple of alligator clips connected to a power supply (a Provari in this case).
This removes any variables such as coil spacing, e liquid and shorts...

Notice that while the center is glowing red, the wire closest to the clips is not.

That's exactly what my wick-positive post bridge looks like, only shorter!
 
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