I wrote a quick email to Thompson Enamel to ask if there was lead in their products because I read that some enamels used on metals contained lead as part of the mixture, and they responded with a big "No" none of their products contain lead 
spraintz, TBinAZ,
If either of you happen to have any scraps that would be the right size for use on a DuD with a standard wick hole (tube under coil only) I'd be interested in that. I don't have the tools or expertise to safely cut up the tube myself. Not a big deal either way, just let me know when the time comes.
Shoot me your info, LucidAce. You need to let me know what exactly you're looking for size-wise. I'll see what I can come up with.
I seem to remember Raidy saying his new design could be used with or without a coil.
Just to throw and idea out in case someone might find it interesting enough and have the time to try it. I had toyed with a juice delivery system that uses a misting system instead of wicking. The problem of course is pressure for the juice. It would be fairly straight forward to find carburetor jets to start the atomization and then put that through a heat stack based on the glass/coil.
The thought then came that we have the required pump our hands. Think of a Gripper with a squeeze pump to pressurize the juice. If done well it wouldn't really require that much pressure and you'd give a squeeze and fire giving you a hit on your vaper.
Maybe I'm just over thinking/engineering it. It wouldn't be the first time.![]()
...couple of observations while vaping my latest ScubaQu set-up. I was playing around with different settings to optimize the vape.
I made a few changes to the set-up here: http://www.e-cigarette-forum.com/forum/modding-forum/351986-pyrex-ss-hybrid-wick-28.html#post7878614
The primary change I made was to reduced resistance from a 1.7 ohm coil to a 1.5 ohm coil to speed up heat-up time. I did this by shortening the bottom leg run to the negative by creating wire contact closer to the wick hole base and by using two m3 stainless steel washers for the positive post. I also pulled the wire a bit tighter.
With a 1.5 ohm coil, heat up time is a bit shorter for the 28g. It still needs a second or two from a cold start to produce, but once the SS wick was hot, it was almost instant-on with vaping. This was very noticeable when chain vaping.
The big thing I noticed was that vapor production and QUALITY improved significantly. I was sorta scratching my head on this one, but upon a closer look two thing became apparent; The washers are ~ at the height of the tip tube/air inlet hole and when I looked down through the drip tip opening in the cap you cant see coil anymore, only the top of the washer. So it looks like the washers are adding some type of positive vortex effect.
The next one gets into a grey zone for me , but with the 1.7ohm coil, if I went above 11.5 watts, the juice felt a bit cooked. Its a bit different taste then the burn taste on a traditionally genny coil on wick. With coil on wick, I saw someone used the term grilled (Dsy5?). This was more like over boiled.
In any case, the point I wanted to make was that with the 1.5 ohm coil, I could get to back ~14 watts before quality went south. Either eliminating a few mm's of non-coiled wire and/or adding the washers really bump up performance.
So this is working really well right now. I actually dont feel compelled to switch back to a traditionally genny. It not yet better overall, there still is a bit of a minor trade-off in vapor quality and time to start-up, but with flavor and set up time its almost better. With some more optimization, this will replace coil-on wick.
Dan, if you can squeeze a washer on top of your positive post, let me know if I am on the right track here with the air flow effect or if its just sleep deprivation playing tricks on me.
Long live ScubaQu
The three chamber design sounds decent, but I'm pulling for doing it with two.
I also don't think we are in raidy's newest design here, he has published glass tube stuff before, many of his clouds are spout like, and the whole with or without kanthal part is just mysterious.
Dan, how it the condensate doing?
There is and if you use it let us know how it works. I will say that the diameter is larger than we would probably need though. I havent found aything under 3mm. AND porous ceramic can be a PITA because it supposedly clogs quickly. Its normally used to filter biomass from liquids. once clogged I can't think of how to remove it. Even if you torch it, there will still be ash collection cloging it up. I havent done the testing however but apparently it was tested some time ago and it failed to absorb after a few uses. I still would like to see it done though. The "apex alpha" and "cera" use porous ceramic as a juice well but other than that I dont think it works as a wick with direct heat on it.
see my post above. I am not sure we NEED porous ceramic with this specific method. We could use a ceramic in a similar way that dan was using the glass with the mesh or cotton or something else inside. The ceramic would provide a barrier to prevent shorting.
If I could get my ceramic tube cleaned off, I could try this method. I just cannot figure that part out.