Original poster: dhmccauley-at-spacecatlighting-dot-com > I'm attemping to wind a 3.75 od acrylic tube with 19" of 36 > awg (175 tpi/~3300 turns according to my wire table). 3300 turns is much too high. Your wire losses as this point, especially with the 36 AWG wire, will be much too high. I suggest using a larger diameter wire and maybe 1400 turns maximum. Dan