Ohms logic confusion.

[yodadude]

So I can't work this out...
I am using .22 A1 kanthal and 1mm silica wick. I make a dual coil with 4 wraps on each coil, the ohms reads .6 which is no good on a vamo. So I make it a single coil with 4 wraps and its 1.2. Ok, so I make the single coil with 7 wraps and it reads 1.8. So why do the ohms drop making 2 coils but rises with a longer single coil? My logic was "more wire=higher ohms" so why can't I make a dual coil?
On another note, I would like a dual coil with as many wraps I can get away with using a vamo, so which wire would I need. If it helps, I have Ss rope, Ss sheet and 1mm wick so There is a choice of wicks, just need help with wire.
Thanks for helping a confuzzled soul.

 

[Dopey]

When you make a dual coil you end up with half the resistance of both coils, if you want to get a dual coil firing on a vamo then make each coil 3ohms that way you will end up with 1.5 ohms total.
If you use 3mm silica and double it over instead of 1mm single that's going to increase the resistance

 

[yodadude]

Seems to me then, that I need thinner wire then as I would need (if I think right) at least 9ish wraps for each coil for dual action. And there's me thinking thicker wire would mean less wraps doh!

 

[johnners]

A similar question.. excuse for hijacking your thread...
How the devil do I test the resistence on a dual coil with a multimeter? I make a dual coil but with a continuous single wire, going through the positive post and finishing at each end on each of the negatives... So where go I place my probes to get a full reading?
j

 

[mike137]

From both the negatives (at the same time) to the positive. Can you bridge the begs with one probe?

 

[Mawsley]

So I can't work this out...
I am using .22 A1 kanthal and 1mm silica wick. I make a dual coil with 4 wraps on each coil, the ohms reads .6 which is no good on a vamo. So I make it a single coil with 4 wraps and its 1.2. Ok, so I make the single coil with 7 wraps and it reads 1.8. So why do the ohms drop making 2 coils but rises with a longer single coil? My logic was "more wire=higher ohms" so why can't I make a dual coil?
On another note, I would like a dual coil with as many wraps I can get away with using a vamo, so which wire would I need. If it helps, I have Ss rope, Ss sheet and 1mm wick so There is a choice of wicks, just need help with wire.
Thanks for helping a confuzzled soul.

Calculating total resistance for parallel resistors

 

[sandwich_slayer]

A similar question.. excuse for hijacking your thread...
How the devil do I test the resistence on a dual coil with a multimeter? I make a dual coil but with a continuous single wire, going through the positive post and finishing at each end on each of the negatives... So where go I place my probes to get a full reading?
j

I put one probe on the centre pin at the bottom of the 510 connector and one on the threads of the 510 connector where the battery or mod connect to the atty.

 

[sandwich_slayer]

Seems to me then, that I need thinner wire then as I would need (if I think right) at least 9ish wraps for each coil for dual action. And there's me thinking thicker wire would mean less wraps doh!

thinner wire would help. I use 3mm wick and can get 2 or more ohms easily with 0.2 kanthal at about 5 wraps. so I would end up with over 1 ohm on dual coil

 

[daleson]

cut a piece of kanthal ...Start with say 6" then measure it on your meter end to end it will give you a reading then just cut it down till you get the ohms you want ...So long as you use all the kanthal it will give you same when coiled give or take a .1 or 2 thats how i do mine

 

[yodadude]

Aaaah, I've got it now, thanks. And a good idea to wrap too, thanks. I will try it tonight. I hope a dual coil lives up to my expectations lol.