I Clear 30 replacable head, ohm question

[Deleted]

On the iclear 30 's I am using the 2 ohm heads. On a provari and an SVD. I see when ordering new heads there is a choice of the 1.5 or the 2.0 ohm. Is one better than the other for the pv's I am using?

I seem to remember reading somewhere that a 1.6 ohm coil is most suited to the provari , so would the 1.5 be a better choice?

What is the reason for choosing one or the other?

Thanks

[Karma]

It really doesn't matter when you have VV or VW as you can just adjust the power to suit.

With a lower oHm head you would simply use a lower setting on VV etc

[giles]

For the same voltage setting, a low ohm resistance will put more power through the coil, so more taste, more vapour, but also more likely to burn.

If you have a vv or vw device like a provari or svd then it doesn't matter too much with a pre-built head, because you probably wouldn't turn it right up anyway. If you build your own heads you can set them up so they can use the extra power.

If you do set your provari and svd at max at the moment, then you certainly want the 1.6 ohms.

If you have a Provari there is a case for having all your heads at the same ohms, so that you don't have to change the voltage setting when you change the head (I usually forget on my LT). The SVD can stay at the same watts setting anyway, and will automatically change the volts to match the head's ohms.

[Deleted]

Thanks guys (Karma and Giles) for your helpful replies. I agree yes I can adjust power to suit and even better.. Wattage on the SVD. Out of interest though, would the 1.5 ohm heads require less power to obtain/ reach the same vape leading to longer battery life. Sorry if that's a daft question but I'm still learning LOL.
At the moment I'm hovering around 4 volts on both. Gives 8 watts.

[giles]

Jan 6, 2014 21:15:24 GMT @zero said:

Thanks guys (Karma and Giles) for your helpful replies. I agree yes I can adjust power to suit and even better.. Wattage on the SVD. Out of interest though, would the 1.5 ohm heads require less power to obtain/ reach the same vape leading to longer battery life. Sorry if that's a daft question but I'm still learning LOL.
At the moment I'm hovering around 4 volts on both. Gives 8 watts.

Hopefully somebody will be along who understands this much better than I do. In the meantime:

It's the same power, but less volts. Which, if I remember the physics I did 40 years ago right, means more amps. What this means for battery life I don't know, but suppliers used to recommend against using low ohm attys on some batteries - Riva for example. So I make some coils at around 1.3 ohms in RBAs which go on my mods, but rightly or wrongly I make higher ohm ones for the evods & mini protanks that go on my spinners for out & about. 

[Deleted]

Thanks again.

I need to get more batteries I think!!

[alansi]

Jan 7, 2014 0:38:41 GMT giles said:

Jan 6, 2014 21:15:24 GMT @zero said:

Thanks guys (Karma and Giles) for your helpful replies. I agree yes I can adjust power to suit and even better.. Wattage on the SVD. Out of interest though, would the 1.5 ohm heads require less power to obtain/ reach the same vape leading to longer battery life. Sorry if that's a daft question but I'm still learning LOL.
At the moment I'm hovering around 4 volts on both. Gives 8 watts.

Hopefully somebody will be along who understands this much better than I do. In the meantime:

It's the same power, but less volts. Which, if I remember the physics I did 40 years ago right, means more amps. What this means for battery life I don't know, but suppliers used to recommend against using low ohm attys on some batteries - Riva for example. So I make some coils at around 1.3 ohms in RBAs which go on my mods, but rightly or wrongly I make higher ohm ones for the evods & mini protanks that go on my spinners for out & about. 

This might helps:

[Deleted]

Yes using that will show the answer thanks!!!
Hence using: thelocust.net/ohm/

4v on 1.5ohm: 10.7Watts, 2.7Amps
4v on 2ohm: 8Watts, 2.0Amps
So the 2ohm uses less power/current!
QED

[giles]

Ah, but to get the same vape you need the same power (watts). It is the power that does the work, which is why your energy bills are in kilowatt hours.

So to get the same vape on the 1.5 ohm as you do on the 2 ohm you need less volts:

If you are using 8 watts on the 2 ohm you'll want to use 8 watts on the 1.5 ohm. Which you''ll get on the Provari by changing the volts from 4 to about 3.5
V = square root of watts times resistance = square root of 8 x 1.5 = square root of 12 = 3.46 volts.

The current (amps) is volts/ohms. On the 2 ohm it was 4/2 = 2. On the 1.5 it will be 3.46/1.5 = 2.3. So your battery is turning out less volts but more amps in order to get the same amount of power through a smaller resistance.

Someone did a table to tell you the voltage setting you need for different resistances, which you might be able to find. Or you could do the maths. Or, you could do what I do, and just change the volts until it vapes the way I want.

[Deleted]

Thanks Giles.
What I fall into the trap of is the small pipe big pipe denial syndrome.
Do you mean this chart below?

[charon]

Jan 8, 2014 12:16:48 GMT @zero said:

Thanks Giles.
What I fall into the trap of is the small pipe big pipe denial syndrome.
Do you mean this chart below?

There ya go you have answered your own question.... well done Gold Star and top marrks on this assignment

[Deleted]

LOL
Good one, unfortunately too true.
Now I understand the importance of having a basic concept of safety on using mods,batteries et al.
I'm getting there but not there yet.
If I want to tinker I need to have an understanding of the basics.

[charon]

@zero
Well as you know, that is what this forum is all about. No one will ever judge or ridicule a member on here.
Discovery is after all part of the fun

[giles]

Actually @zero I think it was another one, not that it matters, except that I think maybe this one is too conservative. I'm vaping at 12.5 watts atm, taking drags long enough to make the SVD cut out. I couldn't have done that on the gear I had a year ago, and maybe this is an old table.

When something burns depends on how fast you can get juice to the coil, and that has gone up quite a bit over the last year or so with people using double coils and microcoils and cotton instead of silica.

[markm]

The calculations in the table work, ignore the colour coding though as
It is, as said above, way out of date. Rebuildables in particular can work
Way off that scale.
In terms of battery safety, any regulated device should keep you well within
The parameters of any battery. The amp ratings on switches is way below
Your battery's max.