watts for 0.8 ohm

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MattyTny

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You should check out this link and look at the Ohm's law calculator.
Steam Engine | free vaping calculators

What you want to do is put the resistance in the equation along with a voltage you want to fire the resistance at. The page will then give you the wattage.

All resistances are not equal in coil properties, so some can handle more voltage than others. For the purposes of prebuilt coils for a subtank like atomizer you want to shoot for about 4 volts, it will perform well.

For example:
R=0.5 ohms
V=4.0 volts
P=32 watts

You can still get great performance with 30 watts on a 0.5ohm coil, but you might want the extra wattage. I'd go with something that can do at least 40 in the case you want to experiment more in the future.

Will you be building or using prebuilt disposable coils? This will determine how much wattage you can actually use. Some coils can get pushed past 5 volts no problem.
 

Susan~S

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Your iStick 20 watt is not capable of firing a coil with a resistance of less than 1 ohm. You will need to upgrade your mod if you want to use a sub-ohm coil.

Lower Ohm Coils Will:

  • Heat The Coil Faster
  • Produce More Vapor
  • Drain The Battery Faster
  • Use E-Juice Faster
  • Produce A Warmer Tasting Vape
Higher Ohm Coils Will:
  • Heat The Coil Slower, Which Will Produce “Less” Vapor
  • Provide A “Cooler” Tasting Vape
  • Use Less E-Juice
  • Prolong Battery Life
 

nikos markakis

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Aug 17, 2015
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You should check out this link and look at the Ohm's law calculator.
Steam Engine | free vaping calculators

What you want to do is put the resistance in the equation along with a voltage you want to fire the resistance at. The page will then give you the wattage.

All resistances are not equal in coil properties, so some can handle more voltage than others. For the purposes of prebuilt coils for a subtank like atomizer you want to shoot for about 4 volts, it will perform well.

For example:
R=0.5 ohms
V=4.0 volts
P=32 watts

You can still get great performance with 30 watts on a 0.5ohm coil, but you might want the extra wattage. I'd go with something that can do at least 40 in the case you want to experiment more in the future.

Will you be building or using prebuilt disposable coils?
prebuilt coils so with the eleaf 60w my subtank is fine? Please tell me what is the difference between low ohm coils and high ohm?
 

edyle

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I cant find anything online that i can understand. Whats the max watt mod im gonna need for 0.8 and 0.5 ohm atomizer? And please tell me whats the difference with low ohms? Rather than high ohms.

1: Max watts needed for 0.8 and 0.5 ohm coils:
Depends on the wire size and material.
Chances are a 30 watts mod would suffice.

2: What's the difference with low ohms rather than high ohms.
the lower the ohms, the closer you are to a full short.

big coils that need high power are low ohms because they are made with thicker wire and/or contain multiple coils.
 

nikos markakis

Full Member
Aug 17, 2015
46
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Your iStick 20 watt is not capable of firing a coil with a resistance of less than 1 ohm. You will need to upgrade your mod if you want to use a sub-ohm coil.

Lower Ohm Coils Will:

  • Heat The Coil Faster
  • Produce More Vapor
  • Drain The Battery Faster
  • Use E-Juice Faster
  • Produce A Warmer Tasting Vape
Higher Ohm Coils Will:
  • Heat The Coil Slower, Which Will Produce “Less” Vapor
  • Provide A “Cooler” Tasting Vape
  • Use Less E-Juice
  • Prolong Battery Life
i see only downsides on the low ohm coils and makes me wonder why all advanced vapers do vape in low ohm coils
 

EverPresentNoob

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well I use low ohm coils as I like a warm vape with a LOT of flavor. My preferred range is around .2 ohms at about 75 watts. I get huge clouds of vapor and the flavor is out of this world.

Comparing the two is kinda misleading as its like comparing a top of the line 4x4 truck to a Ferrari. they are both great vehicles, but made for different things.
 

MattyTny

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prebuilt coils so with the eleaf 60w my subtank is fine? Please tell me what is the difference between low ohm coils and high ohm?

Yeah that's more than enough.

Susan just gave some info you might find valuable. To get a deeper and intuitive understanding of how resistance works with other variables please look at the Ohm's Law calculator. You should start by putting a resistance in and changing the voltage. Next, lower the resistance and see how voltage changes effect the variables.

If you have the time take a look at my Ohm's law section (first few paragraphs) in my blog, it's a very easy way to understand resistance.
Ohms law and how it applies to personal vaporizers
 

nikos markakis

Full Member
Aug 17, 2015
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1: Max watts needed for 0.8 and 0.5 ohm coils:
Depends on the wire size and material.
Chances are a 30 watts mod would suffice.

2: What's the difference with low ohms rather than high ohms.
the lower the ohms, the closer you are to a full short.

big coils that need high power are low ohms because they are made with thicker wire and/or contain multiple coils.
what is a full short?
 

Susan~S

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i see only downsides on the low ohm coils and makes me wonder why all advanced vapers do vape in low ohm coils
I love a warmer vape and make/use mostly sub-ohm coils vaping at 40-90 watts (depending on the RDA/RTA/clearomizer I am using). It's just my personal preference.
 
Last edited:

93gc40

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Oct 5, 2014
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Resistance isn't what controls how many watts you can use, wicking & airflow is.

You might catch me using a .8 ohm coil at 100 watts, OR, you might catch me using a .8 ohm coil at 8 watts. It all depends on what the .8 ohm coil is in.

And how much wire you used.

On mech mod .8ohms delivers from 16watts @ 3.6volts to 22watts at 4.2xolts. Regardless the wire..... On a regulated mod, depending on the wire used you might run it at 5watts or 200watts.

.5ohm would be 25watts to 35watts, Unregulated. Regulated wattage again would depend on the wire.
 

MattyTny

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what is a full short?

The resistance acts like a medium between a positive and a negative. It limits the amount of current that flows from node to node. When you have a resistance that is 0 it is considered a full short circuit and too much current flows from one point to the next and will most likely cause damage.

Other terms:
Open circuit - an incomplete circuit, no electrical flow
Closed circuit - a complete circuit, current will flow.

Sometimes you'll see a switch on electrical components with "O" or a "|". The "O" is open, or off. The "|" is closed, or on.
 
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