I find when winding a core needing lots of turns such as for an 80 meter coil, to find the middle of the wire needed for the wind and then wind each half of the winding with each half of the wire.? This way you are pulling a shorter length of wire through the core.? Of course you need to reverse the process through the core to wind up with one wind all wound in the same direction.? I also like to use different color wire for different windings. Much easier to keep track of things.? Dabs of five minute epoxy are your friend too in keeping things organized.? I use a tooth pick to apply epoxy so as not to over apply the stuff.? (I also like to put a dab of paint at the center of the wire before winding.? This way if you need to re-count turns once wound, you only have to count each half of the winding.)? Finally, the best advice, "Take your time" and don't get distracted so you miss judge your turns count.? All this may take winding the core longer, but it sure helps finishing with a good neat accurately wound inductor or transformer.
Lee, w0vt
