help please with my 1st sub ohm build

[CloudChaserSchizo]

ok here's the thing guys i made my 1st sub ohm build which is a dual macro coil. using a 28g kanthal. the reading is .89 ohm. ok here's my problem with this .89 ohm dual macro coil build is that. my single coil 1.19 ohm is giving me much more vapor than this macro coil. running the 2 with my voltage meter the 1.19 ohm is 3.60v and in the .89 dual macro coil is only 3.47-3.50 and the last i checked the battery is running in a 3.80v and oh im using a hades mod with Efest 26650 64A 3500mah battery. im guessing the problem is that i should have fully charge my battery before doing the coil or did i do something wrong with the coil? help help help guys.

 

[supertrunker]

Well - a fully charged battery is always a bonus - but the reason why is this: Ohm's Law Calculator

I=V/R
4.2/0.89 =4.72A
P=IV = 4.72*4.2 = 19.8W - but dual coils - so 9.9W each.

Single coil.
4.2/1.19 = 3.52 * 4.2 = 14.8W.

The power - Watts is a measure of power, to the single coil is higher.

I assume a fully charged battery = 4.2v.

T

 

[CloudChaserSchizo]

Well - a fully charged battery is always a bonus - but the reason why is this: Ohm's Law Calculator

I=V/R
4.2/0.89 =4.72A
P=IV = 4.72*4.2 = 19.8W - but dual coils - so 9.9W each.

Single coil.
4.2/1.19 = 3.52 * 4.2 = 14.8W.

The power - Watts is a measure of power, to the single coil is higher.

I assume a fully charged battery = 4.2v.

T

so does this mean its just the batteries? i didnt do anything wrong with the mod? sorry newbie here.

 

[rhelton]

The dual coil will take more power to run. A single coil can vape just as good or better than a dual and give you more battery life.

 

[classwife]

Moved to Sub-Ohm from General Vaping Discussion

 

[Ryedan]

ok here's the thing guys i made my 1st sub ohm build which is a dual macro coil. using a 28g kanthal. the reading is .89 ohm. ok here's my problem with this .89 ohm dual macro coil build is that. my single coil 1.19 ohm is giving me much more vapor than this macro coil. running the 2 with my voltage meter the 1.19 ohm is 3.60v and in the .89 dual macro coil is only 3.47-3.50 and the last i checked the battery is running in a 3.80v and oh im using a hades mod with Efest 26650 64A 3500mah battery. im guessing the problem is that i should have fully charge my battery before doing the coil or did i do something wrong with the coil? help help help guys.

Give us more information CloudChaserSchizo. In each build which RDA are you using? How many air holes are open? What is the inside diameter of the coils (what size pin did you wrap them on)? How are you wicking the coils?

A couple of good pictures of the builds would really help too

Battery voltage needs to be kept in mind too. Vapor production at 4.2V is way more than at 3.6V with the same build.

 

[CloudChaserSchizo]

Give us more information CloudChaserSchizo. In each build which RDA are you using? How many air holes are open? What is the inside diameter of the coils (what size pin did you wrap them on)? How are you wicking the coils?

A couple of good pictures of the builds would really help too

Battery voltage needs to be kept in mind too. Vapor production at 4.2V is way more than at 3.6V with the same build.

1st this is the RDA that im using zenith v2 im using 2 of its air holes there's 1 more in the other side.



2nd this is what i used to wrap the coil a 3mm. i'm using this because i cant use a drill bit because i have sweaty hands. lol



3rd and here is the sample of the coil i did

 

[Ryedan]

Thanks for the info

I went to the Steam Engine coil calculator and input the numbers for your two setups. I got 8/9 wraps for each of the duals and 5/6 for the single. Heat flux is the amount of heat delivered per square mm of coil surface area. If that gets too low the coil will not get hot enough to make a good vape.

Your single coil = 113 @ 12 watts.
Dual coil setup = 80 @ 16 watts.

I used 3.8v for both.

IMO 80 is too low to get the coil temperatures high enough to make a good vape. You could try to close down the air holes and take slower drags to let the coils heat up more and see if that helps. Also, I would keep all of the outside of the coils clear of cotton. I'm not sure from the pictures, but it's possible you have cotton under the coils. Anywhere that happens you have lost that part of the coil for vapor production.

I also suspect it takes a long time for both of these setups to heat up, the dual being worse.

So, if you like the way the single coil setup vapes, stick with that. If you want to get more productivity from the dual coil, work the calculator. If you drop the resistance to say 0.7 ohms you've gone up to around 20 watts combined, so 10 watts per coil. I bet you will see a significant improvement there. If you put in two 1.2 ohm coils, making it 0.6 ohms combined, you'll have the same performance from each coil as you get in the single setup now so you should get double the vapor production.

0.6 ohms draws 7 amps from the battery at 4.2v, so your batteries will be just fine.

The other approach is to use thinner (higher gauge) wire at the same resistance. That will make coils with less surface area allowing an increase of coil temperature. Again, the calculator is your friend here

 

[supertrunker]

so does this mean its just the batteries? i didnt do anything wrong with the mod? sorry newbie here.

No - it just means that you need to make lower resistance duals. You make good coils from the pics.

I typically use a calculator to play with different gauges (thicknesses) of wire, but i like to double check myself with this chart.
It's always a trade between time to heat up (and cool down) and the amount of wick you can cover with wire for any given resistance.

As long as you don't endanger your battery by exceeding the constant discharge Amp limit - have some fun and see what you prefer; there are a few different ways to get the same vape.

T

 

[CloudChaserSchizo]

Thanks for the info

I went to the Steam Engine coil calculator and input the numbers for your two setups. I got 8/9 wraps for each of the duals and 5/6 for the single. Heat flux is the amount of heat delivered per square mm of coil surface area. If that gets too low the coil will not get hot enough to make a good vape.

Your single coil = 113 @ 12 watts.
Dual coil setup = 80 @ 16 watts.

I used 3.8v for both.

IMO 80 is too low to get the coil temperatures high enough to make a good vape. You could try to close down the air holes and take slower drags to let the coils heat up more and see if that helps. Also, I would keep all of the outside of the coils clear of cotton. I'm not sure from the pictures, but it's possible you have cotton under the coils. Anywhere that happens you have lost that part of the coil for vapor production.

I also suspect it takes a long time for both of these setups to heat up, the dual being worse.

So, if you like the way the single coil setup vapes, stick with that. If you want to get more productivity from the dual coil, work the calculator. If you drop the resistance to say 0.7 ohms you've gone up to around 20 watts combined, so 10 watts per coil. I bet you will see a significant improvement there. If you put in two 1.2 ohm coils, making it 0.6 ohms combined, you'll have the same performance from each coil as you get in the single setup now so you should get double the vapor production.

0.6 ohms draws 7 amps from the battery at 4.2v, so your batteries will be just fine.

The other approach is to use thinner (higher gauge) wire at the same resistance. That will make coils with less surface area allowing an increase of coil temperature. Again, the calculator is your friend here

oh my thanks for this Mr. Ryedan didn't expect someone would explain this much stuff in a single post. really an addition to my sub ohm knowledge. anyways i guess the problem i did with this build was the cotton beneath the coil. i didn't expect that it would be a factor on vapor production. thanks for the info. i removed that and problem solve more vapor than my single coil build. thanks for this reply. after i enjoyed this build ill try that 0.6 ohm build.

 

[CloudChaserSchizo]

No - it just means that you need to make lower resistance duals. You make good coils from the pics.

I typically use a calculator to play with different gauges (thicknesses) of wire, but i like to double check myself with this chart.
It's always a trade between time to heat up (and cool down) and the amount of wick you can cover with wire for any given resistance.

As long as you don't endanger your battery by exceeding the constant discharge Amp limit - have some fun and see what you prefer; there are a few different ways to get the same vape.

T

thanks for the chart going to study this one.

 

[Ryedan]

oh my thanks for this Mr. Ryedan didn't expect someone would explain this much stuff in a single post. really an addition to my sub ohm knowledge. anyways i guess the problem i did with this build was the cotton beneath the coil. i didn't expect that it would be a factor on vapor production. thanks for the info. i removed that and problem solve more vapor than my single coil build. thanks for this reply. after i enjoyed this build ill try that 0.6 ohm build.

You're welcome and glad it helped

 

[edyle]

ok here's the thing guys i made my 1st sub ohm build which is a dual macro coil. using a 28g kanthal. the reading is .89 ohm. ok here's my problem with this .89 ohm dual macro coil build is that. my single coil 1.19 ohm is giving me much more vapor than this macro coil. running the 2 with my voltage meter the 1.19 ohm is 3.60v and in the .89 dual macro coil is only 3.47-3.50 and the last i checked the battery is running in a 3.80v and oh im using a hades mod with Efest 26650 64A 3500mah battery. im guessing the problem is that i should have fully charge my battery before doing the coil or did i do something wrong with the coil? help help help guys.

No the problem is you need more voltage to drive the two 1.8 ohm coils than you need for your 1.19 ohm coil.

basically you need something like 6 volts for that dual coil.

 

[DaveSignal]

The problem is that your resistance is too high for dual coils on that mech mod. I think you should shoot for a resistance around .3 to .4 to start out. If I was using 28 gauge, I would be twisting to strands with a drill or running parallel coils.

 

[CloudChaserSchizo]

0.6 ohms draws 7 amps from the battery at 4.2v, so your batteries will be just fine.

Mr. Ryedan another question does this mean i should keep my battery fully charge when going to do/use this build?

 

[edyle]

The full charge is 4.2 volts.
When in use, it drops quickly at first, and plateaus around 3.7 volts where it supposedly stays the longest

then once it starts dropping from there, it drops faster;

My regulated mods let them run down to 3.3 then cuts them off.

People who use regulated mods generally don't let them get anywhere that low;

 

[Ryedan]

Mr. Ryedan another question does this mean i should keep my battery fully charge when going to do/use this build?

I used 4.2v because I was looking at battery amp draw and amp draw is highest at a given resistance at the highest battery voltage. Vape that setup from 4.2v down to around 3.7-3.6v like usual

And please just call me Ryedan. Mr. Ryedan is making me feel old ........

 

[CloudChaserSchizo]

I used 4.2v because I was looking at battery amp draw and amp draw is highest at a given resistance at the highest battery voltage. Vape that setup from 4.2v down to around 3.7-3.6v like usual

And please just call me Ryedan. Mr. Ryedan is making me feel old ........

tried the .6 ohm that you said. and really enjoying the clouds on this one, that's a .64 ohm btw you cant see the 0. because the other light of my ohm meter got busted. anyways. another question i don't know if this make any sense but right now im vaping my 1.07 ohm single coil and the smoke is thicker but less vapor than the .64 ohm dual coil that has much more vapor but thinner when exhaling. im thinking its because of the air holes? any thoughts?

 

[Ryedan]

tried the .6 ohm that you said. and really enjoying the clouds on this one, that's a .64 ohm btw you cant see the 0. because the other light of my ohm meter got busted. anyways. another question i don't know if this make any sense but right now im vaping my 1.07 ohm single coil and the smoke is thicker but less vapor than the .64 ohm dual coil that has much more vapor but thinner when exhaling. im thinking its because of the air holes? any thoughts?

I've never experienced that CloudChaserSchizo. I almost always use dual coils so I have little experience with singles and at this point nothing comes to mind to me that would explain it. All you can do is experiment with things, see what happens and learn from that

 

[CloudChaserSchizo]

I've never experienced that CloudChaserSchizo. I almost always use dual coils so I have little experience with singles and at this point nothing comes to mind to me that would explain it. All you can do is experiment with things, see what happens and learn from that

i guess its just me. anyway thanks for all the help Ryedan. Vape ON!!