how many wraps?

Discussion in 'Rebuildable Atomizer Systems' started by danwelsh, Aug 2, 2012.

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  1. danwelsh

    danwelsh Super Member Verified Member ECF Veteran

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    Ok guys and gals, just a question regarding rebuildables, i have an ra on its way and i'm wondering, since i don't have a provari i have no way of knowing what the ohm reading will be with how many wraps i put around my wick, is there a generalization rule for this, example 3 wraps equals 2 ohms(just guessing here) or is there another way for me to check the ohm level without having to buy something expensive?
     
  2. Flyer

    Flyer Ultra Member Verified Member ECF Veteran

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    Get a digital multimeter, they're relatively inexpensive. Mandatory for rebuilding if your PV won't measure resistance.
     
  3. danwelsh

    danwelsh Super Member Verified Member ECF Veteran

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    ok, thanks, i will
     
  4. epetrillo

    epetrillo Senior Member Verified Member ECF Veteran

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    Has to do with the gauge of the wire your using and the length, not the number of wraps. I use 1 inch of 32g Nichrome resistance wire between the NR wires on my Penelope. That gets me 1.7 ohms and 4 wraps on a single 3mm wick.
     
  5. Theken

    Theken Super Member Verified Member ECF Veteran

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    I would also recommend getting a product like Atomizer/Cartomizer Ohm Meter

    Makes it really easy, MadVapes has one as well once their store is back online.
     
  6. narcosleepygirl

    narcosleepygirl Senior Member ECF Veteran

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    I got a Z-Atty Pro and it came with 6 wraps on the wick and the ohms read 2.8

    I just wrapped my first coil on it and did only five wraps and have an ohm reading of 2.0
     
  7. Suthrnbuckhunter

    Suthrnbuckhunter Ultra Member Verified Member ECF Veteran

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    I just completed my 1st rebuild with 32 a-1 kanthal as r and 30ga .999 siler wire as nr.I measured out 2 inches of the 32 a-1 and got 5 wraps on a doulble wick using slica...measured out on my Provari @ 2.4omhs...same on the multimeter I got from madvapes...this is giving me loads of vapor and fantastic flavor in my Penelope on my Provari @ 5 volts,and I am a total noob at this LOL..this one is better even than the one premade that came with the Penelope,althou I belive its because I did something a bit wrong with the premade one...but for my very 1st on my own I am very very HAPPY;););)
     
  8. Suthrnbuckhunter

    Suthrnbuckhunter Ultra Member Verified Member ECF Veteran

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    example 3 wraps equals 2 ohms(just guessing here) or is there another way for me to check the ohm level without having to buy something expensive?


    You really should have at least a multimeter for rebuilding but let me add this.This is only based on what Ive read thus far and from my 1st experince.The number of wraps will not determine the omh rating of your coil.The omh rating is determined by the total length of risistance wire between the connection of the R wire and the NR wires.My 32 a-1 R wire is tated @ 1.2omh at 1inch,so 2 inches is 1.2omhX2=2.4omhs.Im sure if I am incorrect someone will be by in a bit to set me str8.....:)

    this is of coarse based on using R wire & NR wire to make a coil for the Penelope,Im not sure what you would do if you are making a coil for an atomizer that uses only the R wire to rebuild

    I would assume the pricipal would be the same.the length of resistance wire used between the 2 connectors of the atomizer,and not the number of coils.....hopefuly the more advanced folks will chime in to help us both..:)
     
  9. TommyG

    TommyG Super Member Verified Member ECF Veteran

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    15 dollars could get you a simple meter that would be accurate to at least the 10th of an ohm, that's about as inexpensive as it gets.

    Sent from my DROID RAZR using Tapatalk 2
     
  10. BethAnn

    BethAnn Senior Member Verified Member ECF Veteran

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    Say i want to make a 1.8 ohm coil head for my stardust. How long should the wire be and how many wraps around the wick. My kanthal wire is A1 32. Trying to learn :)
     
  11. zoiDman

    zoiDman My -0^10 = Nothing at All ECF Veteran

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    Where did you buy it? Do you have a link.

    Because most places will tell the Ohms per Foot of Different Size Wire.
     
  12. BethAnn

    BethAnn Senior Member Verified Member ECF Veteran

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  13. zoiDman

    zoiDman My -0^10 = Nothing at All ECF Veteran

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    Well, that site didn't say what the Resistence is per foot.

    But this one says that it is 12~15 ohms per foot.

    http://www.amazon.com/Resistance-Heater-Kanthal-A-1-0-20mm/dp/B008R891XY

    So that would be about 1 ohm per inch. So if you are aiming for 1.8 ohms I would start with a piece that is about 1 1/2 inches long and see how that goes.

    You just have to get your Husband to find that Multi-Meter to know what is going on.
     
  14. BethAnn

    BethAnn Senior Member Verified Member ECF Veteran

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    Awesome...Thanks zoiDman!!!
     
  15. tobarger

    tobarger Ultra Member Verified Member ECF Veteran

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    32ga Kanthal A1 is rated at 1.2ohm per inch
    So 1.5 inch will equal 1.8ohm

    Setup as two equal proportions
    (1/X)=(1.2/1.8) and solve for X

    1(1.8)=1.2(X) --> 1.8/1.2=X --> 1.5=X

    The resistance of a coil is not determined by the number of coils
    It is determined by the length of the resistance wire used to make it
     
  16. zoiDman

    zoiDman My -0^10 = Nothing at All ECF Veteran

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    Sure thing.

    Once you get a head that works Perfect and has the Exact Ohms you want, Unwrap it and Measure how long it is. Then cut a Piece of Heavy Paper like a 3-x-5 Card the Length of the Wire.

    Then you can use the Piece of Paper as a Template to cut as many Pieces of Wire as you like without having to Measure again.
     
  17. zoiDman

    zoiDman My -0^10 = Nothing at All ECF Veteran

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    Length is what does it.

    But the Number of Coils is Kinda wrapped up in the length. Pun Intended.
     
  18. Rz78

    Rz78 Full Member

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    Have anyone tried using 28gauge wires? I love hot vaping with my mechanical mod. Sweet spot 1.3ohms
     
  19. tobarger

    tobarger Ultra Member Verified Member ECF Veteran

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    Resistance in Ohms/inch for the Resistance Wires

    Kanthal Grade------- A-1 ------ A -------- D ----- Nichrome 60 -------- Nichrome 80

    30 awg (ohm/in)----- 0.7 ------ 0.7 ------ 0.7 -------- 0.6 ---------------- 0.5
    31 awg (ohm/in)----- 0.9 ------ 0.9 ------ 0.8
    32 awg (ohm/in)----- 1.2 ------ 1.1 ------ 1.1 -------- 0.9 ---------------- 0.9
    33 awg (ohm/in)----- 1.4 ------ 1.4 ------ 1.3
    34 awg (ohm/in)----- 1.8 ------ 1.8 ------ 1.7 -------- 1.4 ---------------- 1.4
    35 awg (ohm/in)----- 2.3 ------ 2.2 ------ 2.1
    36 awg (ohm/in)----- 2.9 ------ 2.8 ------ 2.7 -------- 2.3 ---------------- 2.1
     
  20. BethAnn

    BethAnn Senior Member Verified Member ECF Veteran

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    Great info!...kinda off topic but i just made a cotton ball wick also...LOL, just measured it at about 1.5 ohms (3 wraps). Need to wait for more juice to come in before i try it out. When i first read that thread about that guy making a cotton ball wick i thought he was joking...but as i read more about it, seems like it works great for those who have tried it. Can't wait to try mine out :)
     
: madvapes, provari
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