I built a 28g coil, 9 wraps with a 1.8 id. According to vapors tool box it should have been 1.5ohms but it's reading at 1.3 on my multimeter and sigelei. What could have caused the .2ohm difference? Did I not leave the legs long enough?
I would think the coil spacing would be a factor, too....
I've always understood it as the length of the wire being the factor in resistance of the coil for a given gauge, so the number of wraps and leg length are determined by inner diameter and wrap spacing....I didn't even consider that. I tried keeping my wraps as close as possible but ended up with some slight eve. Spacing between them.
I would think the coil spacing would be a factor, too....
That's not what I was implying.... The more space between coils, the slightly more wire is used per wrap, increasing the ohms ever so slightly if you're only doing your coils on the number of wraps....Coil spacing has ZERO affect on the OHMs of a coil.OHMs is a result of wire diameter and length, doesn't matter how you coil it or if you wad it into a ball. 3" of a given gauge kanthal will always read at the same ohm.
Spacing affects how the heat of the coil is distributed. It does not affect the ELECTRICITY part of the equation.