Extra Class

What challenge is presented by a small wire-loop antenna for direction finding?

What indicates the correct value of terminating resistance for a Beverage antenna?

What is the function of a Beverage antenna’s termination resistor?

What is the function of a sense antenna?

What type of radiation pattern is created by a single-turn, terminated loop such as a pennant antenna?

How can the output voltage of a multiple-turn receiving loop antenna be increased?

What feature of a cardioid pattern antenna makes it useful for direction-finding antennas?

What is the primary function of an external earth connection or ground rod?

When evaluating RF exposure levels from your station at a neighbor’s home, what must you do?

Over what range of frequencies are the FCC human body RF exposure limits most restrictive?

When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?

What hazard is created by operating at microwave frequencies?

Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz?

What is meant by “100% tie-off” regarding tower safety?

What does SAR measure?

Which of the following types of equipment are exempt from RF exposure evaluations?

When must an RF exposure evaluation be performed on an amateur station operating on 80 meters?

To what should lanyards be attached while climbing?

Where should a shock-absorbing lanyard be attached to a tower when working above ground?