Extra Class

What third family of circles is often added to a Smith chart during the process of designing impedance matching networks?

What do the arcs on a Smith chart represent?

In what units are the wavelength scales on a Smith chart calibrated?

When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

Which is generally true for 160- and 80-meter receiving antennas?

What is receiving directivity factor (RDF)?

What is the purpose of placing an electrostatic shield around a small-loop direction-finding antenna?

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?