Abstract: A small (about 8 inches long) low pass, high power (4000 watts) electric filter may include a tubular outer conductor separated from an dielectric sleeve by an outer dielectric that may be an air-filled gap. The dielectric sleeve surrounds a series of alternating capacitive elements and inductive elements. Each of the capacitive elements includes an inner conductor, such as a copper slug, that contacts the dielectric sleeve. Each of the inductive elements has a helical wire coil surrounded by a dielectric silicone compound that contacts the dielectric sleeve and the inner conductor. The silicone compound in the inductive elements facilitates heat transfer from the inductive elements and increases capacitive capacity. The air gap between the outer conductor and the dielectric sleeve adds another capacitor. The outer conductor and the dielectric sleeve may touch to improve heat transfer from the filter.