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This is a typical vertical. You can almost see the guy wires which double as a top hat. It is made of three 12-foot 2x4s mounted on an 8-foot 2x4 buried in the ground. The overall height is 23 feet. The top hat wires are also 23 feet long, sloping at a 45-degree angle. The combination of wire is resonant around 3.5 MHz. With a 30 uH inductor, the resonance becomes about 1.83 MHz. A series 68-ohm resistor and 16 25 foot radials brings the feed point impedance to 75 ohms. The box in the foreground contains a relay and phasing line that switches the favored direction from northeast to southwest. Power for the relay is decoupled from the feed line.
Vertical Antenna Layout Phased Array Block Phased Array Typical Vertical Vertical Base Vertical 8 plus Tx Antenna Reversing Relay Reversing Box Reversing Box Schematic Beam Steering Receiving System
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Typical Vertical  [4 of 12] ExhibitPlus Typical Vertical

FILE NAME: Typical Vertical.jpg  |  35mm FOCAL LENGTH: 0mm  |  EXPOSURE TIME: 1/800 sec  |  EXPOSURE MODE: Auto exposure  |  APERTURE: F4  |  ISO SETTING: 64