Squeezing and Brushing the coil.

[HighPlainsPuffer]

With typical contact coils, heating and squeezing is enough to remove any hot spots for me, but I've noticed with claptons their little contact hot spots from the exterior wire wrap can be a pain to squeeze out, and the strumming them removes the contact spots every time, and very quickly.

 

[Bad Ninja]

Honestly I can't answer that but I am sure we don't roll our coils the same and the devil is in the details as they say. I am not sure if I will get around to it (had a minor surgery yesterday) but I am going to try and make a short video of how it works when I build.

I'll try this when I build again, but I don't understand the need.

Are you guys getting hot spots when you build on an rda?

I'm not arguing, I'm curious, but I need facts.
Anecdotal experiences online don't hold a lot of weight with me, without some science.

Maybe I'm missing a step that's causing hot spots.

 

[Douggro]

"Honey, why do you always cut the ends off the ham before you cook it?"
"Because that's the way Grandma always did it."

"Grandma, why did you cut the ends off the ham before you cooked it?"
"To get it to fit in the pan. It was the only pan we had."

Never any problem questioning why we do certain things.

 

[Jdurand]

I've seen strumming coils work for both new coils and older coils not firing as desired. When I see something have the effect I'm looking for after being advised to do so, my desire to understand WHY it works is far less than my appreciation of the fact it DOES work. I'm sure there is science behind it, but my only proof is watching it work as described. Not enough proof for you, try it for yourself and see if there is any difference at all.

 

[Bad Ninja]

With typical contact coils, heating and squeezing is enough to remove any hot spots for me, but I've noticed with Claptons their little contact hot spots from the exterior wire wrap can be a pain to squeeze out, and the strumming them removes the contact spots every time, and very quickly.

Ahhh, are you all referring to Clapton type coils?
That could be it.

I don't use Claptons.
I tried all the elaborate art coils when they first hit the scene, from simple twisted to alien, and personally didn't find any advantage over properly built standard coils.
Parallel coils are the only elaborate coils I build, and they are extremely efficient.

 

[ruet]

I'll try this when I build again, but I don't understand the need.

Are you guys getting hot spots when you build on an RDA?

I'm not arguing, I'm curious, but I need facts.
Anecdotal experiences online don't hold a lot of weight with me, without some science.

Maybe I'm missing a step that's causing hot spots.

I thought it was pseudo-scientific bunk as well. That is, until I started doing twisted builds. I could fire a new build 2,3,5 or 10 times and not get even, inside-out, heating. One strum with a flat head mini-screwdriver fixes it every time. I don't know about fixing hot-spots though. Maybe folks are getting their terminology mixed up

 

[HighPlainsPuffer]

Ahhh, are you all referring to Clapton type coils?
That could be it.

I don't use Claptons.
I tried all the elaborate art coils when they first hit the scene, from simple twisted to alien, and personally didn't find any advantage over properly built standard coils.
Parallel coils are the only elaborate coils I build, and they are extremely efficient.

When I'm not using claptons I don't bother strumming as everything lines out fine, but with claptons if there are some little hotspots on the outer wrap, strumming works wonders!

 

[ReigntheGamer]

I'll try this when I build again, but I don't understand the need.

Are you guys getting hot spots when you build on an RDA?

I'm not arguing, I'm curious, but I need facts.
Anecdotal experiences online don't hold a lot of weight with me, without some science.

Maybe I'm missing a step that's causing hot spots.

Yes I do. Usually when I first fire a coil it will fire unevenly(hot spots) and/or have hot legs, this is when building on a Loki Labs Odin and a coil jig to wrap on.

ETA: All of these are 28ga., 8 wrap, .0625" dia.. Hopefully I can get that video made and it can illustrate it better than my descriptions.

 

[Bad Ninja]

Yes I do. Usually when I first fire a coil it will fire unevenly(hot spots) and/or have hot legs, this is when building on a Loki Labs Odin and a coil jig to wrap on.

ETA: All of these are 28ga., 8 wrap, .0625" dia.. Hopefully I can get that video made and it can illustrate it better than my descriptions.

Even with standard, single strand coils?

 

[englishmick]

Are you guys getting hot spots when you build on an RDA?

I get them a lot on small contact coils for PT's. Don't remember noticing them on the spaced coils for the Lemos or the dripper. Mostly it's on one end, a couple of loops at the end will glow much brighter than the rest of the coil. Sometimes heating and squeezing sorts it out, sometimes I have to brush them with the screwdriver.

I make them by hand without a coiler, and my eyes aren't too good. I'm guessing if my eyes worked better my coils would be more regular and I might not get hot spots. If a robot built coils, with perfect spacing and perfect tension, I assume there wouldn't be any irregularity that could lead to hot spots. Maybe it's just the skill of the person wrapping the coil. Or like in my case fading eyesight.

 

[Bad Ninja]

I get them a lot on small contact coils for PT's. Don't remember noticing them on the spaced coils for the Lemos or the dripper. Mostly it's on one end, a couple of loops at the end will glow much brighter than the rest of the coil. Sometimes heating and squeezing sorts it out, sometimes I have to brush them with the screwdriver.

I make them by hand without a coiler, and my eyes aren't too good. I'm guessing if my eyes worked better my coils would be more regular and I might not get hot spots. If a robot built coils, with perfect spacing and perfect tension, I assume there wouldn't be any irregularity that could lead to hot spots. Maybe it's just the skill of the person wrapping the coil. Or like in my case fading eyesight.

I don't get hot slots but it's probably not skill.
I'm almost 50, wear glasses and have arthritis.
I don't build spaced coils. Usually build by hand, wrapped around a a screwdriver or drill bit.

 

[ruet]

I don't get hot slots but it's probably not skill.
I'm almost 50, wear glasses and have arthritis.
I don't build spaced coils. Usually build by hand, wrapped around a a screwdriver or drill bit.

Man you make that (me) sound old. STOP!

 

[ReigntheGamer]

Even with standard, single strand coils?

Absolutely the specs I listed in my previous post are the only ones I ever roll.

 

[WharfRat1976]

I brush my coils with the corner of a mini flat head as I rub my belly, Tap my toe all whilst whistling the Star Spangled Banner. Works like a charm.

 

[Douggro]

I brush my coils with the corner of a mini flat head as I rub my belly, Tap my toe all whilst whistling the Star Spangled Banner. Works like a charm.

No, no, no! Doing it wrong! You're supposed to recite the Pledge of Allegiance while brushing coils! I thought everybody knew that. Hmmpphh.


{Yes, I brush my coils too. It works. Don't care how or why. It just does. That's all that matters.}

 

[Nikea Tiber]

I didn't believe that strumming coils made a difference until a week ago.
About two months ago I switched to 316l stainless steel wire for my builds. Three and a half months ago, I started winding tensioned coils for the kanthal and ti coils I was building. I heard about coil strumming, tried it and noticed no real difference with kanthal since it rarely had hotspots or hot legs that didn't vanish after 2-3 pulses.
I was winding some ss coils for a coworker last week and he asked me why I don't strum the coil as I was pulsing it to remove hotspots. I told him I didn't think it worked, then tried it to demonstrate, the pulse after I strummed the coil heated it uniformly.
I re-coiled his other RDA and tried strumming the coil on the first pulse, and it makes a huge difference with ss wire, been strumming my ss builds since, if the effect is a placebo, I've never seen one so profoundly noticeable.

As to pinching, I don't have to really compress the coil a lot because of the compression winding technique I use, but I will hot-compress and micro-position each coil again after it heats uniformly to make each coil as consistent as possible in exact size and placement in relation to the incoming air.

 

[WharfRat1976]

The first time I saw a version of coil strumming was Super X did it in one of his vids. He took his mandrel back and through back and through like 10 times on each coil to get them to glow evenly. Like has been posted, it somehow molecular ly links the winds together. I play guitar so am used to strumming things anyway[emoji12]

 

[fitzinthewindow]

I love this thread.

 

[gadgetkeith]

Talk to your wire and brush it, stroke it, strum it, just be nice to it while making your coils.

They will perform and taste better.

ANGRY coils spit and pop you dont want angry coils.

We want NICE coils.

Did you know if you fire your MOD with your finger rather than you thumb it tastes so much better.

Try it ,it works

LMAO

 

[ruet]

Talk to your wire and brush it, stroke it, strum it, just be nice to it while making your coils.

They will perform and taste better.

ANGRY coils spit and pop you dont want angry coils.

We want NICE coils.

Did you know if you fire your MOD with your finger rather than you thumb it tastes so much better.

Try it ,it works

LMAO

Don't forget to call it George.