If you went from 0.5 Ohm 25 awg to 0.8 Ohm 25 awg by adding more wraps AND lowered watts your being counter productive. You need much higher watts on 7 wrap 25 awg 0.8 ohm to get the same heat as 5 wrap 25 awg 0.5 ohm and your increasing your surface area. You would be better off using 5 wraps at even lower watts but same mw/mm2 then 7 wraps. 0.1mm less surface area.
Last edited: