What is one disadvantage of a directly fed random-wire HF antenna?
Which of the following is a common way to adjust the feed-point impedance of a quarter wave ground-plane vertical antenna to be approximately 50 ohms?
Which of the following best describes the radiation pattern of a quarter-wave, ground-plane vertical antenna?
What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?
How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?
Where should the radial wires of a ground-mounted vertical antenna system be placed?
How does the feed-point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?
How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?
Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?
What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?
What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?
What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?