Total posts : 45366
53 turns of 54/44 Litz wire were close-wound on a styrofoam cylinder. The coil diameter is 2.88 inches and the length/diameter ratio is .434. The low-frequency inductance is 242 uH. The inductance at 1680 kHz is 299 uH. The measured self-capacitance is 7 pF. The measured Q is 382, and the equivalent series resistance of the coil is 8.3 ohms.
The self-capacitance calculated by the Medhurst method is 3.8 pF. Combining the Medhurst and Butterworth methods gives a calculated Q of 558.