Topband: [TowerTalk] 160 vertical question (Top Hat)

[Paul Christensen]

>"Another technique that is often used for matching is to make the wires much longer than resonant (that is, resonant around the top of the BC band), so that the feedpoint Z is 50 +jX ohms (that is, inductive) on 160M, and tune the capacitance out by adding a capacitor of equal value in series.    NEC can easily model this."

When over-resonating with a long T-top, the maximum current point moves away from the ground and up toward the center of the vertical radiator -- another benefit.   Unless there's a deliberate need to resonate on the operating frequency (e.g., with some phased arrays), then over-resonating a single T-top vertical radiator should be the objective, subject to the availability of long, tall supports on either side of the vertical section.

Paul, W9AC