Using 28g Kanthal for a dual parallel coil around a 2mm bit. 7 wraps comes to .3 ohms. VV set at 45 to 50 watts. So
. this is the best set up I have come up with on my Mutation x v2. My question is
what would you guys suggest to try next? I had good results with twisted 28 dual coils but the coils took some time to cool off. I like the dual parallels, but am very curious about what coil set ups other (more knowledgeable) people are building for the Mutation x v2. Any input is always appreciated. Thanks, Jim
Mutation x v2. Better coil than dual parallels?
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Hi Jim,
Per the Steam Engine coil modelling calculator... your build numbers aren't adding up.
7 wraps of 28 A1 on a 2mm mandrel (with a net (4 legs total) leg length of 10mm) is more like 0.6Ω. A net 0.3Ω dual parallel build would require a 3 wrap, if all other variables are the same.
Also, at 50 watts output to your above build, you'd have a uncommonly hot heat flux of 740 mJ/mm2. As a 0.6Ω build, you'd have a far more reasonable 370 mW/mm2.
For more information on Steam Engine, including an advanced user guide with extensive reference to heat flux, click on the two sigline hyperlinks below.
Cheers
Per the Steam Engine coil modelling calculator... your build numbers aren't adding up.
7 wraps of 28 A1 on a 2mm mandrel (with a net (4 legs total) leg length of 10mm) is more like 0.6Ω. A net 0.3Ω dual parallel build would require a 3 wrap, if all other variables are the same.
Also, at 50 watts output to your above build, you'd have a uncommonly hot heat flux of 740 mJ/mm2. As a 0.6Ω build, you'd have a far more reasonable 370 mW/mm2.
For more information on Steam Engine, including an advanced user guide with extensive reference to heat flux, click on the two sigline hyperlinks below.
Cheers
by his usage of dual i think he is inferring he has two parallel coils thus giving him the .3 resistance
Yes T4T3ZOR. Dual parellel coils with 7 wraps of the doubled wire (14 circles of wire per side). Sorry I did not make it more clear State o Flux. Any more wraps seems kind of cramped in the atty and 30 g Kanthal seems kind of delicate. I haven't tried the "stove top" coil or a larger diameter drill bit. The parallel coil seems to heat up and cool down very quickly and gives a lot of surface area for the .3 ohms. Just always looking to "improve" the performance (denser/more vapor and good flavor). This set up works well up to 50w but any more watts and not so much. Thanks for any guidance, Jim
One of my go to builds is a dual coil set up with each coil using 4 parallel strands of 28g, 4 wraps around a 3\32 bit (2.381mm) Leg length on this will determine if is .1 our .15. its not a scorching vape and produces like crazy. You could always adjust to get the ohmage you want by bumping up to 7\64 adding another wrap and longer legs. I get the best performance from this build on 3\232 to 7\64 diameter range.
Thought I'd weigh in on this as I have been vaping the mutation x v1 exclusively since I got it. Running it on a sigelei 100 for reference, I do not know how this pertains to a mech since I only ran the mut x on a mech for a week or so.
I used standard micros for a few weeks as either 24 or 22 gauge. I found the 22 was excessive on the sigelei as I didn't need to worry about resistance as much. The ramp up/down time of the 22 just annoyed me. 24 was ok and my primary build for a while.
I got inspired and then did a fused clapton. It was a success in that it looked perfect and vaped well but again, ramp up/down time was crazy as the wire was so thick.
Recently I've been building 2 or three times a day (waiting for uni to start up and have the time) and have tried a few things.
Got the 24 parallels down, Again, ramp up time annoyed me, otherwise good surface area.
28 parallels were pretty good, especially 4 strands per coil. Decent ramp up time and surface area was good.
After a while, I settled on 2 strands 26 gauge parallel dual coils. 7 wraps or so. Perfect balance of surface area and efficiency. I swear I got much longer battery life off this build.
Recently I've been mixing up my parallels a bit. For instance, I am currently running a parallel setup with 1 strand twisted 28 and the other quad twisted 32. Awesome look and stellar performance. Got the idea from twistedmesses with his staged heating coil.
Also, did a twisted 28/straight26 parallel last night. Pretty bloody nice but a little bit hot.
Point is, the mut x copes well with pretty much anything but, after I get bored with my current build I will probably just go back to the standard parallel 26s which, I feel, work best with the mut x.
Hope my long winded and frankly dull story helps.
P.S no vapers where I live nor vape shops, so I take the chance to talk about builds when I can.
I used standard micros for a few weeks as either 24 or 22 gauge. I found the 22 was excessive on the sigelei as I didn't need to worry about resistance as much. The ramp up/down time of the 22 just annoyed me. 24 was ok and my primary build for a while.
I got inspired and then did a fused clapton. It was a success in that it looked perfect and vaped well but again, ramp up/down time was crazy as the wire was so thick.
Recently I've been building 2 or three times a day (waiting for uni to start up and have the time) and have tried a few things.
Got the 24 parallels down, Again, ramp up time annoyed me, otherwise good surface area.
28 parallels were pretty good, especially 4 strands per coil. Decent ramp up time and surface area was good.
After a while, I settled on 2 strands 26 gauge parallel dual coils. 7 wraps or so. Perfect balance of surface area and efficiency. I swear I got much longer battery life off this build.
Recently I've been mixing up my parallels a bit. For instance, I am currently running a parallel setup with 1 strand twisted 28 and the other quad twisted 32. Awesome look and stellar performance. Got the idea from twistedmesses with his staged heating coil.
Also, did a twisted 28/straight26 parallel last night. Pretty bloody nice but a little bit hot.
Point is, the mut x copes well with pretty much anything but, after I get bored with my current build I will probably just go back to the standard parallel 26s which, I feel, work best with the mut x.
Hope my long winded and frankly dull story helps.
P.S no vapers where I live nor vape shops, so I take the chance to talk about builds when I can.
If you like mixing, try a parallel 26 coil with one nichrome and one kanthal. The nichrome helps heat up the kanthal faster. When I tried it I did 3 strands with 1 nichrome strand and 2 strands of kanthal on each side of the nichrome, it was a nice vape.
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I have a copper mutation x mechmod with a copper mutation x v2 RDA and a copper vertex boss Intl' mechmod with same RDA. I absolutely love the parallel coils as big as 7 (14) macro wraps and as small as 3 (6) nano wraps (dual) but what one of my RDA's have on them now is a "quad" build. While my vertex has a 5 (10) nano wrap parallel coil on each side with 24 g kanthal, my mutation x has a quad coil 4 wrap nano 24 guage kanthal, both with the same RDA mind you, and I have to say that the latter heats up and cools down faster with more vapor AND flavor production! Yes, there is more dripping/changing out wicks involved, but for a person that likes instant gratification, I'm in love! Just my two cents, IMO.
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