What determines the DC resistance of a coil?
The DC resistance of a coil is basically determined by the magnet wire gauge being used and the length or number of turns being used. As you increase the number of turns in a pickup, the DC resistance will increase. If the magnet wire is stretched when winding can cause the DC resistance to increase but if the magnet wire is stretched too far, it can cause the insulation to break and cause shorted turns that would lower the normal DC resistance. If a coil is wound too fast it can cause the wire to stretch and not give it enough time to form to the shape of the coil making the pickup spongy. Magnet wire is normally insulated and higher the number the finer or thinner the magnet wire. Winding two coils with 5,000 turns of 42 heavy insulation will have a higher DC resistance than a coil wound with 42 single insulation providing the copper conductors are both equal. The 42 heavy insulation will cause the coil to be fatter and a longer length of magnet wire with increased DC resistance. Ano
