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Thread: Voltage drop vs brass and SS?

  1. #1
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    Voltage drop vs brass and SS?

    I have a cheap brass nemesis from FT. It hits way harder than my Hcigar SS Nemi.

    I took the top and bottom cap off the brass and put them on the SS and now its all good.

    Why would my new and shiny Nemi not hit as hard? I hear people talking about brass hitting harder but i dont understand how thats even possible. The tubes dont conduct electricity, its all through the pins and terminals as far as i understand. Was hoping someone could point me in the right direction

  2. #2
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    The variance in performance is probably a result of the inconsistent nature of clones.

    Brass is a better conductor than SS, so it theoretically should hit harder. It can be measured, but in practice I doubt many people (if any in a double blind test) could notice the difference.

    The tubes form part of the circuit. The negative pin connects to the button, which is connected to the tube, which connects to the negative threads of the top cap, which connects to the negative terminal of your atty.
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  3. #3
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    would be interesting to see a test.

    There is so much metal in a tube, I doubt any of us could measure the difference in voltage. (the resistance). Thicker the conductor, the less resistance.
    If you were using a 0.1ohm coil it may show up.

    I'd be looking more at connections. Specifically if the 510 pin that comes in contact with the battery is machined flat. There may be a tiny bump on one and not the other. 510 may also move a tiny bit sideways


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  4. #4
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    A guy on another forum does some pretty hardcore testing.



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  5. #5
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    @ luntingsir - thanks

    3.26mm stainless wire has around 0.026526ohms/ft (mods are even thicker. Just used the numbers I had)

    many approximations follow
    Halve that above for a mod tube and you get 0.013263ohms/15cm

    on a 0.1ohm coil you would lose 1.3% of power

    Connections threaded and flat contact and springs make the difference. (ss vs brass)

    I still say the 510 may be machined with tiny grooves left. With any half decent mod that has good threads, the 510 pin on both sides in the weakest point.
    Last edited by sushiaddiction; 05-03-14 at 04:07 PM.


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  6. #6
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    Connections and batteries.
    Seems pretty silly to me to describe your device in any context discussing voltage drop WITHOUT mentioning the type, model and age of your battery. The internal resistance of the battery is quite likely to be the highest resistance component in the circuit after the atty itself, assuming good maintenance of connections etc.
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  7. #7
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    hi
    there is a noticable differece in V drops and perforance in vape hardware
    IMHO all the difference is silver plating
    you can't go wrong with silver pins as long as all your threads and those pins are clean
    then you mod hits like a train man

    conductive carbon grease may be ther answer to you problem VKing has it

    cheers


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  8. #8
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    Quote Originally Posted by MrGruffy View Post
    Connections and batteries.
    Seems pretty silly to me to describe your device in any context discussing voltage drop WITHOUT mentioning the type, model and age of your battery. The internal resistance of the battery is quite likely to be the highest resistance component in the circuit after the atty itself, assuming good maintenance of connections etc.
    Yeh. Except he was asking about ss vs brass top part only.
    I did not even bother doing a comparison because the difference would be so small. Total guess, less than 0.01% at 1ohm. Why even bother working it out


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  9. #9
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    Silver plating is a cheap chinese upsell nowdays.

    It is not the difference maker.

  10. #10
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    Im using the new sony 30 amp batteries. Battery i was testing has been through 4-5 cycles as i only bought it last week.

    I wasnt aware that the tubes formed part of the circuit.

    Considering its a dramatic difference ill have a look and see if its the pins that are not completely flat.

    I got the carbon grease from VK as well and greased her all up before i tested.

    Cheers guys!
    ultravape likes this.

 

 
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