Yeah, I'm about to order some from England (good prices, good shipping to OZ) ... 25, 27 and 31AWG
TC beyond Ni200: Nickel Purity, Dicodes; Ti, SS, Resistherm NiFe30; Coefficient of Resistance
- Thread starter TheBloke
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Footnote on the "Jiggles" (above) or more properly oscillations about the Set Temperature: With the fixed TCR they are never greater than 1.3 degrees F, more often dead on than not. With the graph they vary as widely as +/- 14 degrees F.
Music wire follow up to these posts:
One
Two
Tested with thermocouple, resistance recorded by Escribe and averaged in Excel.
Fairly linear in vaping range but at .0043 TCR, the sensitivity in the vaping range is 70% compared to nickel (100%).
Contents for .csv file:
"Temperature (degF)","Electrical Resistivity"
75,0.296
246,0.415
312,0.464
380,0.515
438,0.559
512,0.618
Uploaded via Escribe and tested on a .14 build on an Aromamizer, thermocouple read temp within 1 degree of setting. Vapes fine.
No, not accurate to national bureau of standards, but it works.
Using everclear to clean wire worked fairly well, noticed even less smoke off coil on first pulse.
HTH
One
Two
Tested with thermocouple, resistance recorded by Escribe and averaged in Excel.
Fairly linear in vaping range but at .0043 TCR, the sensitivity in the vaping range is 70% compared to nickel (100%).
Contents for .csv file:
"Temperature (degF)","Electrical Resistivity"
75,0.296
246,0.415
312,0.464
380,0.515
438,0.559
512,0.618
Uploaded via Escribe and tested on a .14 build on an Aromamizer, thermocouple read temp within 1 degree of setting. Vapes fine.
No, not accurate to national bureau of standards, but it works.
Using everclear to clean wire worked fairly well, noticed even less smoke off coil on first pulse.
HTH
Check out Reliant 60W Temp Control + TCR Mod by Apollo.
I just have no luck with NiFe48 and contact coils. I'll perhaps get into explaining more but got to go somewhere now.
I have great success with them spaced.
I have great success with them spaced.
Ok, here's a dual 24 gauge 2.4 mm 9.5 wraps (if I'm counting correctly) contact nife48, on my plume veil clone. Ohming out to .124(.117 after refinement). Temp is behaving very stable. Great vape but hate the plume veil cause they added holes in juice deck and juice leaks out if you over drip even just a lil bit. Stupid design, IMO. WiFi went out so had to take a phone pic. Sorry.
You can shove toothpicks in the bottom holes and cut them flush so they don't interfere with the barrel. That is how I semi-curtailed the leaking from the bottom holes. In the end I still ended up ditching that atty because it was too leaky.
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Actually the NiFe48 contact coil that I put in my Subtank is performing well.
So I stop into my local vape shop to get some rayon (free), never should have gone there BTW.
So when I get home that's when I find out my problem with my NiFe48 in my Aromamizer is a product of the weak spring of my Vapecige's 510. This is how I discovered it:
I have never seen a spring in a 510 so stiff, stiffer than in my Dicodes.
Was that reauloieaxeueaxxuxuxx also free with the rayon? If so, shoot me that vape shop address.Actually the one I put NiFe48 contact coil that I put in my Subtank is performing well.
So I stop into my local vape shop to get some rayon (free), never should have gone there BTW.
So when I get home that's when I find out my problem with my NiFe48 in my Aromamizer is a product of the weak spring of my Vapecige's 510. This is how I discovered it:
I have never seen a spring in a 510 so stiff, stiffer than in my Dicodes.
It's the one in my signature, I supplied them with their first box. I showed them how to do micro coils with cotton the first time I was there. Now days they have become the premier shop of San Diego area.
No I had to buy the mod but am not going to say how much.
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Waiting for the batteries to charge, soon
I bought 3 new batteries for it when I got it but just order 3 more. The ones I got are probably not up to the task, Mxjo 3000 mah. Just ordered some Samsung 25r's
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Meh, with 10.5 V @ low battery, you're pulling somewhere between 4 & 6 amp max, right? Maaaaybe 8 if you're building a big coil?
They should be fine.
Not to say I wouldn't switch to better batteries when possible, but ...
I'll compare the Samsungs to the Mxjo's when they arrive. Not too bad, a bit more sag than my Turnigy Lipo
Lipo sag:
18650 Mxjo 3000 mah 1865 x 3 sag:
I find it acceptable at the wattage that I will be using.
I truly believe they are 3000 mah as they took almost 8 hours to reach full charge in my I-4
Lipo sag:
18650 Mxjo 3000 mah 1865 x 3 sag:
I find it acceptable at the wattage that I will be using.
I truly believe they are 3000 mah as they took almost 8 hours to reach full charge in my I-4
I am having a good experience with my first 26AWG NiFe48 coil. It's a 2mm ID contact microcoil, 7 wraps and the DNA200 reads it at 0.21 ohms. I put it in my Erlkonigin, and the cold resistance is rock solid. You can really torque down the post screws and the wire doesn't snap. The Erlk is a good contender for TC. My word, but the NiFe48 is easy to work with. Much better than the last lot of Ti I had which was too springy. I'm so impressed, I don't think I'll go back to Titanium. I'm getting clean flavour and lots of it. I didn't do the dry cotton burn test, but I emptied a tank and only got the slightest bitter taste at the end, but then I am running it at 470F which might be a smidgen too hot. Oh well 
I was wondering about that too but after the first test on the aromamizer I stopped wondering. I figured it would bomb, not allow changing to custom, shoot an error, run home to NI200 or something. But no it took the upload without sqawking and fired, and tested within 1 degree of set temp on the aromamizer .14 build as measured. Whose build is way different from the test coil build whose base was close to .31. The preheat which default is 200W which was way too strong for my vaping style anyways so back when I got the DNA200 I lowered it to 50 first thing, and even that's plenty to get the coil temp up into the range of data points I have. I don't know what it is actually doing when the base temp is in-between or beyond my lowest data point but I came to the conclusion I don't care. Before the testing I had manually lowered the set temp based on look-up TCR and calculation. But before I started this test I did a vape at a set temp of 360F and found the vape way too hot as was expected. Since the test and data upload, I set it back up to 360F and it vapes like it did when I manually lowered the set temp by look-up and calculation. And it measured correctly on test. And it vapes great. I'm fine with the rest being a mystery.
Next up is iron binding wire from Gesswein when it arrives this week or next. From what I can find, the already annealed binding wire or artist wire is low carbon steel. And 99 purity iron wire is ridiculously expensive. So I'm hoping this solderable jewelry iron wire to be just that, iron. It should be soft and have little spring. If it is, it will cut easier and without hardened cutters and it should be a lot easier to make coils than the spring steel music wire. And if the Ness look-up data is correct, the TCR should be higher but overall build resistance lower although still higher than NI200. We'll see.
Material | TCR | Resistivity (Ness Look-up)
-----------------------------
Iron | .006 | 9.7
1C steel | .005 | 20
NI200 | .006 | 7
That's what I was wondering. What happens when the ambient temp falls below your lowest data point? Have you taken your rig outside in the cold yet?
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