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@1DMF YES the donuts vary. And there are ever more variations coming out. I know this isn't for everybody, but the way I look at it the cost of an IR thermometer and getting to know it is minor in the overall costs. Not to be "elitist" about this (it's apparently considered a sin these days)...

@OldNewbie I have seen enough variation between V3 big donuts that I'd personally start out with a lower wattage like 18 watts at first. You can then raise it if you're not getting a fast enough rise. On my old V3 a TCR of 125 was good. But I guess they're all the squiggly internal wire type...

Another detail is that in a complex mixture like our oils, the boiling/vaporizing points are complicated by interactions. For instance, azeotropes can be formed, where unexpected boiling points of specific mixtures develop. For instance in distilling moonshine you can't separate out the last 5%...

@Actual Dinosaur Sounds like you're doing things right. Yes, the squiggle wire on the big donuts is associated with the high TCR, even 300 can be a bit shy. But I would disassemble the V3 and check the connection. Personally I don't like the screw-down, because 1) The thin lead on the donut is...

@1DMF Given a shortage of substance you might like the V2 type. They are much more economical. My personal favorite has been a V2-alike from an e-bay vendor. It has air holes higher up in the well than the Divine Tribe V2.5/2.7. I then got some 6.8mm x 4 mm alumina ceramic micro-crucible cups...

@1DMF don't worry too much about the 18650 brand and model, because as soon as the wholesalers realize what's popular, they make the appropriate wrappers. I would go so far as to say that most batteries coming from China aren't what they are labeled as. Just because you buy a battery or two...

We TCR freaks have been concerned with accurately calibrating the rig so what you see on the display is what you get. So we've been into the numbers. But here's a simple way to do TC. It's the same on the Pico and the Evic. I prefer the Joyetech because the display is more complete. First you...

FLASH! and we have a new champeen ... For my new BIG Black V3 donut 0.57 ohm TCR = 280 For 2nd donut in BIG Black V3 donut 0.60 ohm TCR = 300 Wow. talk about "not all that consistent". First thought it wuz broke. For nubies: TCR is what you have to set one of your M1, M2, M3 memories to, in...

@Bad Ocelot the emissivity ballpark that's quoted for white alumina is around .50-.80. I went through and tried to determine the real emissivity by comparing temps measured with a thermocouple to what the IR gun read. It's very hard to get a reliable reading with a thermocouple because of the...

I vote for a simple Pyrex cap for the v3 base in the 2.5 style. It's very simple to adapt to a variety of female hydratube bottoms. Not all of them are exact 14 or 18 mm. A little piece of silicone or rubber tubing over the tip of the 2.5 style pointy cap adapts it to just about any female...

The companies selling terpene blends in bulk to "enhance flavor", and their clients, are like the guys who made "15 year old single malt scotch" in 50 gallon drums during alcohol prohibition. IMHO we very simply don't need more fake crap.

@divinetribe great to hear about the plans. Looking forward to trying the different configs. On the subject of terpenes, I think there;'s an assumption that needs to be questioned: that terpenes are a known safe thing. All the terpenes and flavonoids in the plant are present in small amounts...

Yo, @divinetribe , is that like, a Mango smoothie? BTW, you're one hard working stoner, Dude! Great!

@Vape Donkey 650 my sketches are too ugly - I spend so much time struggling with software and gear that hassling in addition with a CAD program is beyond endurance. You know how those RDAs like the Plumeveil have air inlets that you line up by rotating the top? Mold channels and additional holes...

@whatavape Do we know what tape stands up to what temp? There was asbestos tape in the old days. Glass tape? Thermocouples being pressed against the donut with what, that won't draw heat away ? You'd think these sorts of issues were solved ages ago. It's easier when the surface is larger. Aha...

@whatavape that's fantastic! The whole TC field is really getting interesting. Yes, those are the sorts of bumps in the curve that I was noticing when I'd calculate TCR for different ranges. If we can just get credible for 350-450 deg F we'd be doing great. I think you'll love the smaller V3...

The measurement of temperature on a small wire-in-ceramic heater is tricky enough that NASA got involved. http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19990021237.pdf @Vape Donkey 650 personally I do care more about the resulting temp of the oil than the incidental temp of heater...

@Vape Donkey 650 is in a class of his own in terms of gear. And considering he evidently APPLIES all these, he's amazingly resilient. Like Bubbleman who puts away a few g's of bubble before yer very eyes and proceeds to deliver the most organized presentation. And not like my friend Bobby who...

WOW, go away for a couple of days and a million brain cells explode! I'm happy to report that the pessimistic doctrine about never ever ever ever ever re-growing neurons turns out to be inaccurate. GREAT GOING @Vape Donkey 650 ! @divinetribe thanks for the medium cup that came in the mail ! If...

The concept is becoming more popular. This vendor says these ceramic units cannot be used in TC mode. I've asked for details, we'll see what he says.