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 purpose of a Smith chart in amateur radio?
Answer: To graphically represent complex impedance and solve transmission line problems
A Smith chart is a graphical tool used to represent complex impedance and admittance, making it easier to solve transmission line matching problems.
Which emission type designator represents a single-sideband suppressed-carrier voice signal?
Answer: J3E
J3E is the ITU emission designator for single-sideband suppressed-carrier analog voice transmission.
What is the maximum symbol rate permitted for RTTY or data emission on the 20-meter band for Extra class licensees?
Answer: 300 baud
On the 20-meter band, the maximum symbol rate for RTTY and data emissions is 300 baud per FCC Part 97.
What happens to the noise figure of a receiver when a lossy component is placed before the first amplifier stage?
Answer: The noise figure degrades by approximately the loss of the component
Any loss before the first amplifier stage directly adds to the receiver's noise figure by approximately the same amount in dB.
In a phase-locked loop (PLL) circuit, what is the function of the voltage-controlled oscillator (VCO)?
Answer: To generate an output frequency that varies with the applied control voltage
The VCO produces an output signal whose frequency changes in proportion to the DC control voltage applied to it.
What is the primary advantage of using a Beverage antenna for receiving on the low HF bands?
Answer: Very high directivity and low-angle reception with excellent noise rejection
A Beverage antenna is a long-wire receiving antenna prized for its directivity and ability to reject noise from unwanted directions on low-frequency bands.