G4E05
1. Which of the following most limits an HF mobile installation?
G5B05
2. How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?
G4D06
3. How much change in signal strength is typically represented by one S unit?
G2D05
4. Which of the following indicates that you are looking for an HF contact with any station?
G9B07
5. How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?
G1E03
6. What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?
G2A02
7. Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?
G4A02
8. What is the benefit of using the opposite or "reverse" sideband when receiving CW?
G9A04
9. What causes reflected power at an antenna's feed point?
G3A03
10. Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?
G1B02
11. With which of the following conditions must beacon stations comply?
G0A07
12. What is the effect of modulation duty cycle on RF exposure?
G9D03
13. In which direction is the maximum radiation from a VHF/UHF "halo" antenna?
G4C12
14. Why must all metal enclosures of station equipment be grounded?
G2E09
15. How do you join a contact between two stations using the PACTOR protocol?
G3C06
16. What is a characteristic of HF scatter?
G8C07
17. Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?
G1C02
18. What is the maximum transmitter power an amateur station may use on the 12-meter band?
G6A02
19. What is an advantage of batteries with low internal resistance?
G0B07
20. Which of these choices should be observed when climbing a tower using a safety harness?
G7B11
21. For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?
G2B01
22. Which of the following is true concerning access to frequencies?
G7A07
23. What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?
G5C13
24. Which of the following components should be added to a capacitor to increase the capacitance?
G8B03
25. What is another term for the mixing of two RF signals?
G2C06
27. What does the term "zero beat" mean in CW operation?
G4B11
28. Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?
G8A13
29. What is a link budget?
G9C12
30. Which of the following is a characteristic of using a gamma match with a Yagi antenna?
G7C01
31. What circuit is used to select one of the sidebands from a balanced modulator?
G3B07
32. What does LUF stand for?
G6B06
33. What kind of device is an integrated circuit operational amplifier?
G1A03
34. On which of the following bands is image transmission prohibited?
G1D05
35. When operating a US station by remote control from outside the country, what license is required of the control operator?
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