you can see the i leaf 40w TC is tiny. I love it so convenient , i have these in stock and will be making a ad for them on my site tonight or tomorrow
My TC40W came yesterday, and I love it (but this is really about your Ceramic Donut Atomizer):
I've been using your
Version 2.5 Ceramic Donut Atomizer all week with the 30W non-TC iStick and I think your atomizer is really terrific. I have bunch to say about it, and my experiences so far, but some of it will have to wait until tomorrow.
tl;dr is that I think it's the best concentrate atty I have ever used. I'm going to refer to it as "CDA" in the rest of this message.
Confusingly enough, in my preliminary "tests" using the 40W TC iStick, I must say that so far I am preferring the CDA with the battery in regulated mode rather than TC mode. I run the standard (0.8Ω) CDA at 12.5W and I'm really happy. The day to day, load to load, from a full load until it's empty, hit after hit, consistancy is outstanding with thick clouds, GREAT accurate taste, and zero tendency to cough.
As far as the TC40W itself in temp control mode, I find that 300°F is as strong as I can take; any more and I am likely to cough. And for some reason I am at a total loss to explain, even at 300°F, the taste is not nearly as nice as when I just have the TC40W set to 12.5W in standard regulated (non-TC) mode. Plus the clouds aren't nearly as thick and I cough half the time. Maybe the initial surge of 40W that the iStick provides causes the donut to heat up beyond what I want for an instant or two until the resistance changes enough that the temperature limit kicks in. It's not really a burnt taste, but it's not particularly nice, and I don't get the bad taste unless I'm in TC mode.
When the iStick TC40W set to temp mode puts the initial 40 watts into the donut, it's putting 5.66 volts to it. It doesn't stay there for long, (250ms-500ms as a guess), but maybe that's why I'm finding a bad taste in TC mode with the iStick. Or not. More experimenting is in order. (And I don't really care if I just run your CDA in regulated wattage mode, at 12.5W. The important part is the CDA, not the battery, and it's the best drippable atty I have by a long shot). I'm interested in your thoughts about this, and your experience as you get a little time under your belt with the new TC iStick.
fwiw, at 0.8Ω nominal,
10.0W = 2.83v
12.5W = 3.16v
17.5W = 3.74v
40.0W = 5.66v
btw, my particular CDA is 0.67-0.71Ω cold, and (when completely clean) it won't start glowing red until I feed it 10W, at which point it takes a good 10 seconds after applying voltage before one can see the dual faint red glows. At 12.5W it starts to glow after about 2 or 3 seconds, and after 10 seconds will light up the whole donut except the part where the terminal wires live. (It doesn't glow like that at 12.5W when it's loaded, just when it's clean and empty). I've been feeding it 5W to melt a fresh load into the chamber, via a few pulses. Melts the concentrate like a champ without vaporizing any of it.
I do have my doubts the CDA follows the temp/resistance track of Ni200 wire, but one can certainly find out the best temperature setting for a given TC battery by starting very low and dry firing the CDA until one sees the same amount (or lack thereof) of glow that one likes in non-TC mode.
I clean it in two steps, first by pulsing it at 17.5W and blowing through the holes (much like you show in your "how to clean me" video), and then I clean it an iso or ethanol bath. Oh, and I think you should consider closing off the two holes in the side of the 510 connector. I get a tiny leakage of oil there if I've been hitting a big load continuously, when the oil is very thin due to the heat and there's a lot of it. Since the vast majority of air seems to come from the holes in the side of the ceramic base, I don't think the tiny bit of air from the 510 connector will be significant, and the occasional tiny hot oil leak will go away (unless the 510 holes are needed to properly clean the CDA or something).
Anyway, I think the world of your Ceramic Donut Atty, and I think the iStick batteries are a great match, even if I seem to prefer my battery in constant regulated power mode. I'll probably email you later this week to take you up on your offer of a discount on a second CDA. Plus I do want to discuss the difference (in use) between the higher resistance donut version, beyond that it will work on older batteries. (but that will wait until the next message
)
Edit:
@fernand: You may find this interesting. Or not.