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Thread: Protank MicroCoil Discussion!!

  1. #21
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    A sampling of some of the 1.75mm coil results...

    Kanger Protank Coils, JC Mix 1.33 mg, eVic & vMax Rev. 3

    32AWG, 7/6 1.75mm i.d. (2mm Sil.), microcoil
    32AWG, 6/5 1.75mm i.d. (2mm Sil.), tight= 2.2Ω Great vape! Dial 3.5V, 5.5W to start.

    30AWG, 9/8 1.75mm i.d. (XC-132), m.c. =2.1Ω Good vape @ 3.5V, 5.5-6W, Both zMax like!
    30AWG, 8/7 1.75mm i.d. (2mm Silica), microcoil = 1.95Ω Fair vape @3.5V, 6.4W (eVic dialing in 6.4W vs. opt, short?)
    30AWG, 7/6 1.75mm i.d., microcoil = 1.78 √
    30AWG, 7/6 1.75mm i.d. (XC-132), microcoil = 1.78 AWESOME @6.2W (1.67Ω in op)
    30AWG, 7/6 1.75mm i.d. (XC-132), m.c. tight = 1.68Ω


    Kanger 3Ts Coils, JC Mix 1.44 mg, eVic, Magneto/3TS/AW18490

    30AWG, 7/6 1.75mm i.d. (2mm Sil.), microcoil = 1.8Ω PDG, @3.2V, 6W, Kick
    Last edited by MacTechVpr; 11-06-2013 at 01:03 PM.
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    Thank you guys for this thread, I've just read each post and it's encouraged me to finally have a go at MC in my protank 2's, I've got quite good at regular coils, so I'm gonna watch that vid and no doubt re-read this thread several more times then give it a try.
    I've been using organic cotton for my wick with no flavour wick and hoping I'll be able to thread cotton through a micro as I love the clean vape cotton gives, I may try ekowool if it proves too tricky for me.
    I'm getting the feel most of you are using 30ga kanthal or 28ga?
    I've been using 32ga on my regular coils so will order a small reel each of 30 and 28 to see what I find works best.
    Thank you

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    Thanks Mac, your replies are soo informative!! I haven't read through them all, but I will, and I better understand what you're saying now. When you mentioned the different ways of getting an even coil, I use the last technique you mentioned. I wrap more wraps than I intend to have when it's done, and than pull away a few of the wraps under pressure.. Now I'll probably try your other techniques, next time.. ..... Thanks a lot Mac, this is very helpful and informative info!!

    Manicmama, glad we could help!! You definitely won't be disappointed with a proper micro.. It seems 30ga Kanthal works best for me, but I just grabbed some 28 to experiment some more with.
    Last edited by M_DuBb716; 11-06-2013 at 07:04 PM.

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    And I'm really thinking I need to try wrapping on a 5/64in drill bit instead of the 1/16", after reading your results Mac. You say that you get the best results with an inside diameter of 1.75mm.. The 1/16th drill bit gives me an inside diameter of slightly under 1.6mm (around 1.55?)

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    Quote Originally Posted by Flavored View Post
    Tell me, am I over- or under-wicked (ie - do I need to toss a strand or two on top), or is there maybe some assembly thing going on?
    I've read that the optimal amount of wick-material inside the Protank is somewhere around 3.5-4mm (I think).. I use cotton balls, so It's hard to tell exactly how much I use; but I'm guessing about 2mm inside the coil, and a 1.5mm flavor wick on top. I always get a slight leak with my rebuilds - whenever I unscrew my PT to refill or whatever, I'll usually see a tiny amount of juice condensated on top of my battery pin.. Once in awhile, a small drop of juice there. I just wipe it off

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    Quote Originally Posted by M_DuBb716 View Post
    And I'm really thinking I need to try wrapping on a 5/64in drill bit instead of the 1/16", after reading your results Mac. You say that you get the best results with an inside diameter of 1.75mm.. The 1/16th drill bit gives me an inside diameter of slightly under 1.6mm (around 1.55?)
    I'll qualify that because I've been concentrating lately on builds incorporating Nextel XC-132. It has a cross-section of about 2mm but is hollow. It's a tad loose in a 2mm coil winding; and, a bit snug in 1/16" (1.5875mm). I'm looking for a good set of metric precision screw drivers that include 1.6 and 1.8mm because what I'm really looking for is an optimal fit for the wick media. The whole struggle here is getting it in! And for me doing it in place is far more stable. Less chance of damaging the coil you crafted so carefully after it's been nicely tested and burned in. A shame really. Plus making sure you don't constrain the flow (easy to do with hand winds) or it's too loose and perhaps invites flooding.

    To me it's about fit. When it's right and it's really right at 1.75mm and Nextel the saturation is dead on (on Protanks). For 2mm high grade silica, high temp (it's different), it's a bit more compact than standard silica and fits well and snug in 2mm. It's the devil to pay inserting it. Ekowool, I've seen much diameter variation and the appropriate fit for the wick is usually too tight to insert manually with any speed. It takes me less than 10 sec to wick Nextel. Pull some out of the pouch, pretwist the wick a little bit and moisten the tip slightly (not much or it bloats a bit) then let it unwind into the coil with a bit of forward pressure. You may see some bit of fraying from the many weaves that make up the surface. But they're seldom more than .2-.3mm, fold neatly back onto the material and slide on through. Even re-wicking used coils in place is a breeze despite coil carbonization. Too heavy an oxidation layer and it should be replaced anyway. It's gonna fail, or break from handling. I take them out of service. That said, I've not popped one yet (of these in-place rebuilds).

    The material [Nextel] is a pleasure to work with. And...the flavor is different but to my senses less colored than cotton, even washed cotton. Nowhere near as nuanced as Ekowool which has a very distinctive taste to me (I would say rather it better conveys the more vegetable base attributes of juices. So if you're pure VG like me, pop! Some might call it greasy. Think sitting outside MacDonald's. And for me, I taste the plant itself. At least that's my take on the flavor side of Eko. In fact that might be a more accurate rendering of the actual flavor. Now cotton, to answer the above post, I just have to experiment with the right density for the build. I don't see any other way other than to use a standard cotton product such as candle wick. It's not repeatable. And that's my problem with it. We all have our bad days where we can't build a blessed thing. Cotton doesn't make that easier. But it is a consistent flavor result in that it's forgiving. Too loose I find it to be too airy lacking flavor, too dense the wick you get great flavor but not enough of it. Just right, boom! Heaven. Hard to predict, but you know it when you see it. :-)

    Bottom line we want to build quickly and consistently. Easy to do on RDA's with cotton (my preferred). Takes some imagination and technique with the clearo's.

    Good luck and we'll see ya here. Drop a note with your results.

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    Mac, I'm just now finding out that the Nextel XC-132 that you've been talking about, is a wicking material.. At first I thought it was a tool that you used to wrap your wire on, that had the perfect diameter you wanted, or something lol. Yeah I really like cotton, compared to silica - much better taste IMO

    I haven't experimented with ekowool, that XC-132, SS mesh, or anything else though. I feel like I'm still perfecting my microcoil, and trying to find out which works best. Trying to see which resistance works best for me in terms of flavor and amount/thickness of vapor. I still need to try a wider or narrower coil, instead of always using my 1/16" bit to wrap around.
    ..... Hopefully I'm coming close to the perfect microcoil - the one that I love so much, that I will keep building it the same way without changing the design. And I really need to get a mechanical mod, a good RDA (or other rebuildable atty), and start rebuilding on something that is meant to be rebuilt!

    Keep the replies coming guys!!

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    Quote Originally Posted by M_DuBb716 View Post
    Mac, I'm just now finding out that the Nextel XC-132 that you've been talking about, is a wicking material.. At first I thought it was a tool that you used to wrap your wire on, that had the perfect diameter you wanted, or something lol. Yeah I really like cotton, compared to silica - much better taste IMO

    I haven't experimented with ekowool, that XC-132, SS mesh, or anything else though. I feel like I'm still perfecting my microcoil, and trying to find out which works best. Trying to see which resistance works best for me in terms of flavor and amount/thickness of vapor. I still need to try a wider or narrower coil, instead of always using my 1/16" bit to wrap around.
    ..... Hopefully I'm coming close to the perfect microcoil - the one that I love so much, that I will keep building it the same way without changing the design. And I really need to get a mechanical mod, a good RDA (or other rebuildable atty), and start rebuilding on something that is meant to be rebuilt!

    Keep the replies coming guys!!
    I'm with Jonny above on the Magneto as an alternate to my fav. A great switch, really good threading, it Kick's, fires hot on 500/490/350's, nice compact size (22mm, a good fit for rda's)ultra realiable…and inexpensive. Enough to buy two, if you can pick up a good sale. I did. Patience.

    If you're comfortable working 1/16 you're in a great zone. I'm leaning 1.75mm because it's easier to thread 1.5-2mm into. You're really better off here to avoid flooding in a PT as the tank empties and pressure changes. Slightly better wicking but they're very very close with Nextel in performance. However, 1/16" is perfect if you target 1.8Ω. And I hit 1.78-1.81Ω with 30g consistently when I install taught as I've described. No wonder so many people like it. It's a great wind too as a pair of these on an rda and your just at the top of subΩ territory, if you care to venture.

    Here's a great shot by pdib of a Nextel build into 1/16" so you can get an idea of scale. It's a trickily insertion into this size and why I prefer the 1.75mm…

    http://www.e-cigarette-forum.com/for...l#post10032084

    Note his suggestions on introducing the Nextel material into the coil. My experience pretty much echoes that.

    So yea, settle on a coil design and resistance that gets you to your preferred taste/warmth. Then you can sort out what goes in it. I'm likin' Nextel cause it threads easy and I can put together a coil in minutes if not seconds (for a rethread). Can't get any more convenient than that. It just works! In a Protank. What can I say?

    Good luck.

    Last edited by MacTechVpr; 11-10-2013 at 01:03 PM.
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    Quote Originally Posted by M_DuBb716 View Post
    And I'm really thinking I need to try wrapping on a 5/64in drill bit instead of the 1/16", after reading your results Mac. You say that you get the best results with an inside diameter of 1.75mm.. The 1/16th drill bit gives me an inside diameter of slightly under 1.6mm (around 1.55?)
    Want to be clear on the numbers. I think a 5/64" is great on a Protank…but it will not drop all the way down into the slot of the assembly cup. It will nestle at the top of the "V" but is too thick to use as a mandrel (guide). It's roughly equivalent to to 2mm (0.078125 in., 1.984375mm). It's a good silica coil at that with two 1mm top wicks. But it leaks as the tank empties. The top wicks fray often falling to either side of the coil, scorching and dropping air flow. You end up taking a PT apart too many times, besides refilling, just to keep it clear of debris. This combined with silicone stretching and fraying at the base o-ring and the leaks to the slot presented by the fraying silica make this a very unreliable set up. But guess what folks — it's factory spec!

    No wonder we go nuts.

    A 1/16" contact coil (micro coil) is great. Smaller tighter coil, heats up fast, drops and stabilizes in the slot easily but is really dicey to get media into. See the remarks from some of the top builders on this forum in super_X_drifter's excellent thread…

    http://www.e-cigarette-forum.com/for...flavor-th.html

    Scan through or search entries for 1/16" for ideas.

    My rapidly crystalizing solution is the median between these two specs, the rough factory and ideal, or the 1.75mm coil.

    Now to get the number right, I've seen this labeled on some instrument screw kits as 3/43" which works out to the ridiculous 0.069767442 inches. Humans can't fabricate to that precision (yet ?), so lets call it about 1.75mm. I'm looking for a high quality (no aluminum) metric set of precision instrument phillips screwdrivers in .2mm increments which includes 1.6mm and 1.8mm. This would allow varying the flow slightly to account for media, juice viscosity and possible leaking with 3/43" being the approximate center. These are common as jewelers' screwdriver kits but are usually flat-tipped not phillips. The electronics/phone/radio folks have used precision mandrels for this purpose for years. This is nothing new. But they're quite expensive. Microcoils, correctly named, not based on their size are actually contacts coils which more accurately describes their function and design physically.

    But sadly no the 5/64" coil doesn't settle in the slot.

    Good luck!

    Last edited by MacTechVpr; 11-10-2013 at 03:45 PM.

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    Thanks for the excellent advice and info, once again Mac.. I'll probably stick the the 1/16th now since it's working good for my protank, maybe I'll try different diameters when I get an RBA/RDA and a mech.

    And I'm not sure why, but it does seem like the 1.8Ω coil works the best for my PT microcoil setup, from my experience. (By the way, I'm still using 30ga Kanthal on the 1/16th bit).. I'm vaping on a 2.1Ω MC now, and it doesn't seem to be giving me as good of a flavor from my juice, and the vapor is not as thick. Is this because it takes the 2.1Ω longer to heat up than the 1.8Ω??
    ..... I believe the 2.1Ω MC I'm vaping on now is 11 wraps; and I'm pretty sure when I do only 10 wraps of 30ga, I always get about 1.8-1.9Ω resistance reading on my eVic - and that coil seems to give me the best vape

    From my experience - If I go lower than a 1.8Ω microcoil, (like 1.5-1.6), the flavor seems to be burnt or something, although I get thick vapor. But if I go higher (2.1Ω+), the flavor seems muted, or not all there.. I hope everything I've been saying is making sense!
    ....And yes, I have read through the majority of that thread you posted a link too in your last reply Mac. I think that's the thread that inspired me to start rebuilding my Protank, and try out the microcoil!
    Last edited by M_DuBb716; 11-10-2013 at 08:44 PM.

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