DNA 40 works better using Ti grade 1 for higher cold resistance

[Mad Scientist]

I was using Ni 200 and it's impossible to get a dual coil anywhere near the "typical" 0.4 Ohm TC atty resistance suggested in the data sheet. My builds were all closer to 0.1 Ohm or slightly less. They do work but . . .

Tried 28 AWG Ti grade 1 and a 0.4 Ohm dual coil build is no problem. The dna 40 (at least the one I have, VS rDNA, latest rev with resistance lock) "likes" this much better. At 0.1 it gets very hot and chews through batteries like no tomorrow. At 0.4 and up, barely gets warm. I need a few days to see if battery life is improved but it does already seem more efficient.

Anyone using a dna 40 with Ni 200 might want to try the switch to Ti to get atty resistance up where it seems to like it much better.

Cheers.

 

[TheotherSteveS]

this was always the issue with the 'typical' 0.4ohm. Pretty much impossible with any usable guage of Ni. As you say, Ti sorts it out nicely. Higher resistances also reduce the impact of atty static resistance as the fractional contrinution to overall R is much smaller, hence the 40's end up being a lot more accurate in temperature!