Why are direct (not via a repeater) UHF signals rarely heard from stations outside your local coverage area?
Which of the following is an advantage of HF vs VHF and higher frequencies?
What is a characteristic of VHF signals received via auroral reflection?
Which of the following propagation types is most commonly associated with occasional strong over-the-horizon signals on the 10, 6, and 2 meter bands?
Which of the following effects might cause radio signals to be heard despite obstructions between the transmitting and receiving stations?
What mode is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?
What band is best suited for communicating via meteor scatter?
What causes tropospheric ducting?
What is generally the best time for long-distance 10 meter band propagation via the F layer?
Which of the following bands may provide long distance communications during the peak of the sunspot cycle?
Why do VHF and UHF radio signals usually travel somewhat farther than the visual line of sight distance between two stations?