So Mac, question for you.
As you know I have been a proponent of RxW for some time now. My go to set up has been a single coil, 8 wrap around 16 gauge luer, 29 gauge twisted coil with 2mm RxW, coming out to just around 1 ohm. After reading about the 3mm RxW being able to soak up more juice I am considering trying it. My question is that with the thicker wick thus requiring larger coil diameter thus less wraps to maintain current resistance around 1 ohm, how do you think it would effect overall performance? I remember you saying more wraps = more coil contact = better performing. So I'm debating the benefit of the thicker wick other than being able to soak up more juice.
Put it this way, I've done a lot of variations for NexT. Twisted, par, fat/thin and more recently twisted lead center post (3-post) and par twisted lead. I've yet to to overwhelm the 3mm. Why the 4mm's a bit scary lol (I do have the semblance of a juice budget).
You def want to keep the wire as flat as possible on this wick 'cause being so firm it does respond well both to the consistent contact and pressure (deflection). Just like a garden hose. But I think you would benefit for flow and sat on a BF to back off from the compression a tad. I find 3mm responds best at about 2.5mm across a wide power range for both mech's and VW. Lately I'm runnin 24AWG between .3-.4Ω and it's a cool vape with a well oxidized t.m.c. duals. That's 8-turns at about 4mm coil length. Gets really great volume production without an appreciable loss of flavor to diffusion (to my sensitive detection). For ref. on a mech that gets me 60W on a fresh batt on the 4mm. BTW, I still vape Protanks too believe it or not but only with the 2mm or not enough flavor.
Looking at
Coil Toy - Online calculator for e-cigarette resistance coil building real quick for some scale. You'll want to put as much wire on the real estate as poss. And I'm thinkin' you might have the room for a 3mm. You'll need to up your Ø to 2.38mm (3/32) that's going to be close to the deflection you're getting now. Perhaps a tad less compression, still 8-wraps and you'll be droppin' down to 27 AWG for the 1Ω,
16W avg. That's roughly what I vape my sub tanks at (17.5W) with the twisted lead parallels for huge clouds with KGD! Here's what the numbers look like (assuming a t.m.c.)…
29AWG 8/7, 1.651mm i.d., t.m.c. = 1.319Ω
27AWG 8/7, 2.38mm i.d., t.m.c. = 1.124Ω
If ya roll a tight t.m.c. carefully (slowly) oxidized with no wire temp variations (cool dark spots) you'll be puttin' down twice the heat (roughly double the contact area) at wattage. It should fire every bit as fast if it's a t.m.c. You won't experience the same heat up time as an open wind despite the wire change. I have peeps remarkin' to me all the time — why do all my builds fire so fast? Don't ask me to explain it. Just gonna get myself in trouble.
Best suggestion is watch the wire when you wind and pulse. I toss more than I keep. Just don't accept any inconsistencies in tension or turn-to-turn fit up. I've gotta live with the dang thing for at least a couple'a weeks, I'm sure not gonna put up with less than a good vape. Like I keep sayin' it takes a few sec's to spin out another on a pin vise. And usually when I wind, I turn out a few. No matter I've got a single or a pair in reserve.
Recently I noted some of the electron microscope shots of Kanthal on @
Alien Traveler Coil under electron microscope | E-Cigarette Forum thread that the bare wire had a great deal of debris off the spool.
I've seen a lot of photography of Kanthal but not in a typical user state. This was revealing. It could very well be that a lot of the small gaps I've written so much about may be more attributable to this roughage at the surface rather than runout. The latter happens, others have detected it, observed it under magnification and written me about it. It's an important source of gaps and so difficult or incomplete oxidation. But I'm rethinking pre-cleaning the wire. Perhaps with an alcohol wipe. Darn stuff could be skin! LOL And hands too with the dry wash disinfectants everybody's using. That should pretty much square things up nicely for the wind.
Good luck Rudy and let us know how you make out. Or if you want to consider other variations, I'd love to help.
