Loxias Posted October 16, 2016 Author Report Share Posted October 16, 2016 Hi!I couldn't find in the forum the Ohm range of various wires that DNA 75 supports.For example, what is the from - to Ohm range for the SS316L.I really appreciate a table with those ranges for all the wires.Thank you! Link to comment Share on other sites More sharing options...
VapingBad Posted October 16, 2016 Report Share Posted October 16, 2016 Evolv have never produced them for anything other than Ni or Kanthal as far as I am aware, they are in the spec sheet. But you can work it out for yourself EGYou want to know for SS316L You need to pick a temperature, I will use 450 F as you didn't specifyFrom the spec sheet we have max output voltage 6.2 V and max output current of 30 A (I will ignore the max pulse current of 40 A)For full 75 W:max res is found from R = V*V/P = 0.5125 ohmsmin res is found from R = P/(I*I) = 0.08333 ohmsBut you have a temp sensing wire which changes things a little, I will use SteamEngines TCR of 0.000879.res at room temp = 1 then res at 450 F = 1.1866 Then we take the std max res and divide it by this 0.05125 / 1.1866 = 0.0432 ohm for 75 W at 450 FThen we do the same with the min 0.08333 / 1.1866 = 0.0702, but this will be below the std min so will not get to 75 W until hot, so I would suggest just using the standard min.But if you only wanted max 50 W then the std max res would be 0.7688 ohm, and for SS316L @ 450 F it would be 0.648 ohmBut if you only wanted max 25 W then the std max res would be 1.5379 ohm, and for SS316L @ 450 F it would be 1.296 ohmBecause the temp & max power you want and wire type are all factors it is not easy to make a table. The main bit is what resistance will the coil be at when it reaches temperature and is that below 6.2 V squared divided by your wattage. Link to comment Share on other sites More sharing options...
Loxias Posted October 16, 2016 Author Report Share Posted October 16, 2016 Thank you very much for your detailed reply!I'm a DNA newbie and I saw an adv for the new VapeDroid mod equipped with a DNA 75 and in its specs, as you may see in the below picture, is written that supports SS coils from 0.2 up to 1.0 ohm, as well as the range for other wires.Given that I always used SS316L from 1.2 to 1.4 ohm, wattage 11-12, temp around 200-210 C (390-410F), and PG/VG with 6mg nicotine and no aroma, the vaping was according to my taste regarding ?? both vape temp and throat hit. But my coil and cotton, after about 7-8 ml needed to be changed due to heavy black residues. Seeing the above adv, I created a 0.85 coil keeping all other variables the same. And oh marvel! Already have vaped more than 25 ml and both coil and cotton are just slightly colored.This is why I asked the experts here for an advise.Now I'll study your kind information and I'd apply them accordingly.Thank you again! Link to comment Share on other sites More sharing options...
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