I just remembered an very old thread in a German forum that cares about vaping mesh without coils, so exactly what is covered by this thread. It was started by the guy who designed the very first GLV - just a short summary from the first post where he presents his project (translated by me):
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After being happy vaping my Genesis atomizers for some weeks now (thanks Raidy for the Idea and Concept) I picked up Raidys original Idea and tried to leave the heating wire away.
(...)
What did I do?
Quite simple! I bended the wirecontacts at the base of my Genesis atomiser into a circular shape. Now they work a little like a spring and they adapt (more or less good) to the coil. The contact is realized by adapting them in different heights.
The mesh needs to be wrapped in several layers and of course needs to be oxidied.
(...)
Following Raidys basic idea, current will flow through the mesh and will heat it up only because of its own resistance.
(...)
Problems found:
1) Too much vapor and throat hit - I never experienced that in 3 years of vaping
2) The vapor is still too hot despite there is no glowing at the mesh. Liquid is spoied in little drops. Its better to use worn out batteries (3-3.4V)
3) The wicking needs to get better. The wicking is not good enough for a few puffs of chain vaping
4) One needs to learn a new vaping technique as the atomizer works instantly when you push the button (i.e. no heating up). Also one cannot push the button for too long as it will get too hot. A PWM circuit might solve that problem but thats not my field
5) I need lower Liquids as it provides nic like hell
6) What shall I do with my Heating-Wire stock now?
Despite of the mentioned "problems" the thread starter thinks that this will be the future of vaping. Advantages over konventional Wick-HeatingWire atomizers are obvious. The biggest problem is the regulation of the vaping temperature.
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Well, that was the first post of a lengthy thread. As far as I remeber they focused on circuits to regulate the current through the mesh but didn't get it right.
But I am happy that I remembered that thread and will see if there are some interesting points for us burried in that forum...
To be fair - these old patrons of vaping probably would just coughed their lungs out when vaping a dual coil at 0,7 Ohms, they were way more conservative at that time (and didn't have these powerfull batteries we have today) - so some of the problems he describes can be seen more as features today
