Winding and checking the coil for low pass filter for 7 MHz

Johnson Francis | December 25, 2025 | Amateur Radio (Ham Radio) | No Comments

15 turns of 20 SWG wire on a 11mm former as per VU2EVQ design. Calculated length of the coil was 0.914*15 = 13.71 mm (1.371cm). Inductance calculated by online calculator: 1.4 microhenries. See what it turns out to be in my LCR meter!