sort of rebuildable help please

[spaglemon]

am on the list for a mini hellfire and picked up a couple of vivi novas to try in the meantime, have just rebuilt one with new wick and wire, used some wire that was sold to me as kanthal A2 i think, i can't for the life of me remember what size it is supposed to be but it measures 0.13mm on my vernier calipers.



i was only able to coil it 3 times to get a resistance reading of 2.8 ohms, the stock one had about 9 coils of much thinner wire for the same resistance rating, my ones not producing quite as much vapour as the stock one so what i'd like to know is does the number of coils make any difference as long as they both come to the same resistance ?



if it does could anyone recommend a more suitable wire i could try ?



also higher resistance gives more flavour apparently but is there a limit to this ? ie if 2.8 ohms gives more flavour than 1.8 will 3.8 give more flavour than 2.8 ?



using these on an ego twist by the way at 4v





thanks

 

[KulrMeStoopid]

From months of reading, yes the amount of coils matter. I have no idea about any of the rules when it comes to rebuildables, Bryan123456 might. The higher your ohms, the cooler your vape is going to be. I find the warmer the vape, the more flavour, so you might want to add one more coil to bring your ohms down?

Have you primed the coil? I am assuming yes!

 

[spaglemon]

From months of reading, yes the amount of coils matter. I have no idea about any of the rules when it comes to rebuildables, Bryan123456 might. The higher your ohms, the cooler your vape is going to be. I find the warmer the vape, the more flavour, so you might want to add one more coil to bring your ohms down?

Have you primed the coil? I am assuming yes!

i'm missing something here, adding more coils will put the ohms up surely ? i did try it with 4 coils but it gave a resistance reading of 3.2

forgot to mention i only vape sweet juice never tobacco juice

thanks

 

[KulrMeStoopid]

Ah... see you do know more than me Go down one more coil and try? The thicker wire might be the issue though too, not getting around the wick enough?

 

[spaglemon]

have discovered 3 things tonight



1 the thicker the wire the lower the resistance ( i thought it was the other way round )



2 if you try to squeeze too many coils into too small a space and things touch other things they shouldn't, your wifes ego batt goes pop



3 when you do number 2 twice your wife stops shouting and just goes very quiet







thanks for all the advice, now can anyone point me in the direction of a reliable honest wire vendor who will actually sell me some real .20 kanthal wire ?





cheers

 

[Bryan123456]

I am no expert on rebuildable atomizers and coils but there were links on the old UKV to sites that sold the resistor wire and an ebay vendor and kanthal isn't the only suitable type.

What I can say though is that if you set a voltage and a resistance , this will determine the current draw. Some examples:





4 volts @


2.8 ohms


=1.43 amps






4 volts @


1.8 ohms


= 2.2 amps




If the resistance is too low an Ego battery will try to draw too much power and either pop or shut down via its safety circuit (if it has one).


There's an ohms law calculator here:


http://www.ohmslawcalculator.com/ohms_law_calculator.php

 

[spaglemon]

I am no expert on rebuildable atomizers and coils but there were links on the old UKV to sites that sold the resistor wire and an ebay vendor and kanthal isn't the only suitable type.

What I can say though is that if you set a voltage and a resistance , this will determine the current draw. Some examples:





4 volts @


2.8 ohms


=1.43 amps






4 volts @


1.8 ohms


= 2.2 amps




If the resistance is too low an Ego battery will try to draw too much power and either pop or shut down via its safety circuit (if it has one).


There's an ohms law calculator here:


http://www.ohmslawcalculator.com/ohms_law_calculator.php

thanks, so is there an optimum amp range i should aim for ?


cheers

 

[fleeing]

If you insist on using a protected device (eGo etc) or protected batteries, you're going to challenge the protection circuit at some point. Probably best to keep your coils at betweeen 1.6 and 2.2 ohm to keep them safe and get some kind of flavour/steam going.

Thicker wire has less resistance.
More coils gives more resistance and, if evenly spaced to cover more area of wick, in theory produce more steam.

I'd suggest you buy some Kanthal wire in both .2 and .16 so you can practice and experiment. Terry on UKV, supplies through the group buy section on the classifieds there. If you are planning to play with SS wick at some point, http://www.themeshcompany.com/acatalog/25-micron-super-fine-mesh.html#aWSS400SF_2dA4 is where nearly every one has been getting it.

Best drop the eGo and get hold of a stable mechanical mod that you can use IMR batteries in. These don't have to rely on a protection circuit, and usually are able to deliver higher amps.

Good luck and remember it's all electrickery, so when things touch other things they shouldn't, something will stop working/pop.

 

[Bryan123456]

thanks, so is there an optimum amp range i should aim for ?


cheers

You are going to have to google or ask someone else, but standard Ego batteries are 650 mah - thats 0.65 amps current available for an hour when fully charged. I think (someone tell me if I am wrong) that 2 amps current draw may be on the limit or above what they will deliver. You can reduce the current required by turning the voltage down. Use the calculator posted above to get the revised ampages. Hope this helps.

 

[sej016]

If you are going to make your own coils you really need a meter to measure their resistance. You can't just keep leaving it to guesswork and luck.

As mentioned, thinner wire = higher resistance and thicker wire = lower resistance...picture it as water going though a pipe.

So to make two coils of the same resistance you would end up with less turns of thin wire, or more turns of thicker wire.

There's lot of tutorials in places about coil winding, but essentially keep them neat, adjacent turns not touching, evenly spaced, etc.

If you make coils poorly, or of too low a resistance then some devices will see this as a fault and either fail or switch off.

Coil wire can be Kanthal or Nichrome. They have different characteristics - resistance, springyness, even taste some would say.