I need serious help.

Status
Not open for further replies.

Ryedan

ECF Guru
ECF Veteran
Verified Member
Mar 31, 2012
12,869
19,652
Ontario, Canada
You need to build 2 - 2 ohm coils.

In the Setup box select: Dual coil (parallel)
In the Target Resistance box select: 1 ohm

This ^^^. Then enter 'leg length' to your average leg length you expect and enter your preferred 'Inner diameter of coil'. The summary will give you the number of coils to wrap. Change any variable and hit enter for an update.
 

imsoenthused

Super Member
ECF Veteran
Verified Member
May 19, 2011
782
732
43
Tulsa, OK
it seems like 32 gauge is ganna work. just what should i use for wrapping the wire

Whatever you want? Seriously this isn't a hard science, you build and test until you get what you want. People build around all kinds of things. Toothpicks, drill bits, the end of screw drivers, hypodermic needles, the tubes from cotton swabs dedicated wire jigs, etc. If you are using steam engine you use something with the diameter you entered in to it. Even then you have to test it with an ohms meter, and potentially add or remove a wrap.
 

Ca Ike

Ultra Member
ECF Veteran
Verified Member
Jan 20, 2014
1,121
4,217
Cali
Try this. 30g kanthal wire, 10 wraps around a 2mm rod. That will get you 2.2 ohms per coil. With that base 1 wrap is equal to .2 ohms+/- so it should be easy to adjust your build from there. Once you get that down then you can tinker with other ID coils. 1.8mm(1/16 inch), 2mm, 2.3mm(5/64ths), 2.8mm(7/64ths) and 3.2mm(1/8") are what I see a lot of people running for size choices on various atty's. Always double check with a good ohm meter though as wire consistency varies from batch to batch. Kanthal is pretty consistent though.
 

CreepyLady

Ultra Member
ECF Veteran
Verified Member
Aug 22, 2013
2,961
3,555
Salem, MA, USA
how should you find out the inner diameter of your resisitance !

You have an inner diameter of your coil that equals the diameter of what you wrap it on, like a 1/16" drill bit or a 5/64". To hit your target resistance you need to know what diameter you are wrapping on to use a coil calculator.
 

imsoenthused

Super Member
ECF Veteran
Verified Member
May 19, 2011
782
732
43
Tulsa, OK
how should you find out the inner diameter of your resisitance !
You look at an object and you think "gee golly, I could wrap a coil around that, cause it looks like a good size for a wick." Then you wrap a coil on it. Then you stick said coil on an RDA deck hooked up to your ohm reader and you measure the resistance. If the resistance is good, you use the coil, or maybe you wrap a new coil and try again until you get it right. Once you've done this a few hundred times you start to get an intuitive idea of what you are doing. There aren't any real shortcuts, it requires you to start building coils, testing them, and learning from your mistakes.
 

MonicaRae

Super Member
ECF Veteran
I agree -- there is no magic answer here. I use the end of the little screwdriver that comes with an RDA to wrap around or an eyeglass screwdriver. I didn't have anyone to tell me how many wraps to do or what to wrap around..... Especially your first go it's almost like a shot in the dark. Like another poster said grab something around the house that looks like you could wrap some wire around (a screwdriver is what I would go with) do like 10 wraps and see what 2 coils mounted measure out too and adjust from there.

You'll get it in time.. I was very lucky to have a friend who gave me the exact mm of the screwdriver I was using so I'm able to use the Vaper's Toolbox app but after awhile you just know that 8-9 wraps is gonna give you 0.9ohms dual coils (or is it 0.8? see it's been like a year and I'd still have to build it and see!)
 
Status
Not open for further replies.

Users who are viewing this thread