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  1. #1
    Mentor projectjudi's Avatar
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    Talk to me about voltage and ohms please

    I had an awesome gift of vapemail today from one of the great people from this forum.
    I got an IStick! I am UBER excited to try this out but don't really understand the voltage and ohms thing. I am a fairly new vaper and have just been using a plain old battery from my ego starter kit so there's a lot to learn.
    What is an average setting? I am so scared that I will ruin something. Any help would be much appreciated

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  3. #2
    Advanced Mentor
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    Ohms is the resistance of the coil you are using. So if you are using an Aspire Nautilus BVC you may be using a 1.6ohm or 1.8ohm coil and that is what should show up on the display.

    The iStick can be used in either voltage mode or wattage mode. Meaning that is how you will set the device output. If in wattage mode you will be adjusting the wattage and you will see on the display at what voltage the output will be. If in voltage mode then vice versa. I recommend using wattage mode since you can fine tune your output better.

    If you are using a plain old ego battery then the voltage is outputing is 3.7v. If it was a ego spinner then you could set between 3.3v and 4.8v usually. But it sounds like you are not using a spinner.

    What I would do is set the device for wattage. Start at around 7-8W setting. You can then start increasing and decreasing from there to find what your perfect vape is. If you keep going higher and you start getting a dry hit or burnt flavour then backoff on the wattage or voltage.

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  5. #3
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    It can be tricky to understand but I'll give it a shot.

    Wattage is the power that your atomizer is working at. More watts, more vapour (too much watts, you may get a burning taste)

    To calculate the wattage, you need to know the voltage of the battery and the resistance of the atomizer.

    Watts = (Volts^2)/Resistance

    To get more watts, either increase the voltage or decrease the resistance.

    Before we had variable voltage and variable wattage devices, you could adjust your wattage by changing the atomizer with one of a different resistance.

    Then variable voltage batteries came along, and you could adjust the wattage by either changing the voltage, or changing the atomizer.

    Now, variable wattage batteries (like your iStick) will read the atomizer resistance and change the voltage automatically to achieve the desired wattage.

    Like bcameron said, set your battery to wattage mode and start it at 7-8 watts. Adjust upwards as necessary. If you get a burnt taste, then back it down so that it does not continue to happen. Most atomizers are not designed to handle more than 8 watts, except for the Aspire BVC coils, that can reportedly go up to 20 watts.

    Hope this helps!
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

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    As you adjust, you should notice a difference in both flavor and vapor production as well as the temperature of the vape. Sometimes it can even bring out subtle taste elements in a juice. I think you mentioned not liking some previous purchases. I use various settings from juice to juice, topper to topper and sometimes hour to hour. Maybe you'll eat something or drink something and it can affect your taste buds. Now you have the ability to adjust the unit to make the vape more satisfying. None of this would have been possible with your original setup. Good luck!

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  9. #5
    Mentor projectjudi's Avatar
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    OMG!
    Thanks for your help guys.
    Think I have found the perfect vape for me.
    6.5 W also shows (small in the corner)3.6 volts...does this ratio sound a bit right? It also has a funny little symbol then 2.1 so that must be the3 resistance? So much to learn

  10. #6
    Advanced Mentor CK47's Avatar
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    If your using watts don't worry what your voltage is the Istick will adjust it for you. Unless that's the battery level meter then it's telling you the battery life. The symbol you see beside the 2.1 is the ohms. Enjoy your IStick and thanks to the kind forum member who gifted you it. Well done.

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    VIP Member Jetalito's Avatar
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    Thanks for info Stangela, about the BVC coils, going up to 20 watts. I have a Aero tank on my Istick, at 3.9 watts, 2.3 ohm coil. Tasting burnt.

  12. #8
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    Quote Originally Posted by Jetalito View Post
    Thanks for info Stangela, about the BVC coils, going up to 20 watts. I have a Aero tank on my Istick, at 3.9 watts, 2.3 ohm coil. Tasting burnt.
    I assume you mean 3.9 volts.

    3.9^2/2.3=6.6 watts. You should be okay at that with the Aerotank. If you previously had it set too high, it may have scorched the wicks, and the burnt taste remains from that. If you try a new coil at that wattage, it should be fine.
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

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    Guru Vapowulf's Avatar
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    Quote Originally Posted by Stangela View Post
    I assume you mean 3.9 volts.

    3.9^2/2.3=6.6 watts. You should be okay at that with the Aerotank. If you previously had it set too high, it may have scorched the wicks, and the burnt taste remains from that. If you try a new coil at that wattage, it should be fine.
    Except that the iStick apparently uses mean calculation rather than RMS for voltage, so 3.9V is going to actually be around 4.7V (assuming 2:1 pulse with 5.8V peak).
    Best thing to do is dial it right back, and increase watts or voltage by taste.

  15. #10
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    Quote Originally Posted by Vapowulf View Post
    Except that the iStick apparently uses mean calculation rather than RMS for voltage, so 3.9V is going to actually be around 4.7V (assuming 2:1 pulse with 5.8V peak).
    Best thing to do is dial it right back, and increase watts or voltage by taste.
    Good to know Vapowolf!

    so 4.7^2/2.3 = 9.6 watts. A little too high for the Aerotank.

    Do what Vapowolf suggests and dial it back and increase it to suit.
    "All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."

 

 
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