Coil Building - Ohms per Inch

[cheersm8]

Hi Folks,
Just some 'ohms per inch' info which may be useful for anyone new to coil building, and to help reach an approximate 'ohms goal' before having the experience of previous builds to fall back on once you've built a few.

Ohms per inch of wire,used for the coil, for the three common kanthals -
28 awg (0.32mm) Ohms per inch = 0.5 ohms
30 awg (0.25mm) Ohms per inch = 0.7 ohms
32 awg (0.20mm) Ohms per inch = 1.2 ohms

So, if you are aiming for a 1.0 ohm coil,built with 28awg (0.32mm) wire then you need to wrap 2 inches of wire. Obviously, you've also got the short part from coil to posts, so it's tough to be 100% accurate,but close enough.

Might help with that 'how many wraps' question,which depends on the thickness of the wick being used.

 

[Deak]

Thanks for that!
always handy to have a screenshots on the mobile for quick references

 

[Mickfox1]

Thanks pal this will come in handy

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