FREE Ham Radio Extra Class Questions and Answers Flashcards
6 cards from real HAM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE Ham Radio Extra Class Questions and Answers flashcards as text
What is the approximate velocity factor of standard RG-213 coaxial cable?
Answer: 0.66
RG-213 coaxial cable with a solid polyethylene dielectric has a velocity factor of approximately 0.66.
Which type of filter response has equal ripple in the passband and a steeper rolloff than a Butterworth design?
Answer: Chebyshev filter
A Chebyshev filter trades equal ripple in the passband for a steeper transition from passband to stopband compared to a Butterworth filter.
What is the effect of mutual coupling between two closely spaced parallel dipole antennas?
Answer: It changes the feed point impedance and radiation pattern of both antennas
Mutual coupling between closely spaced antennas alters the feed point impedance and modifies the combined radiation pattern of both elements.
What is the purpose of intermodulation distortion (IMD) testing on a transmitter?
Answer: To determine how well the transmitter suppresses unwanted mixing products in the output signal
IMD testing measures the level of unwanted spurious signals produced by nonlinear mixing within the transmitter's amplifier stages.
What is the function of a directional coupler in an RF measurement setup?
Answer: To sample a small portion of RF power traveling in one direction on a transmission line
A directional coupler extracts a small, known fraction of RF power flowing in a specific direction, enabling forward and reflected power measurements.
Under FCC rules, what is the maximum permitted transmitter peak envelope power (PEP) output for an Extra class amateur station on the 70 cm band?
Answer: 1500 watts
Extra class licensees are permitted a maximum of 1500 watts PEP output on the 70 cm (420-450 MHz) band under normal FCC Part 97 rules.