Question
Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?
Answer Options
- A) A system of propagation beacon stations operates on those frequencies
- B) A system of automatic digital stations operates on those frequencies
- C) These frequencies are set aside for emergency operations
- D) These frequencies are set aside for bulletins from the FCC
Correct Answer: A
Explanation
The frequencies 14.100, 18.110, 21.150, 24.930, and 28.200 \text{MHz} are internationally recognized centers for a network of HF propagation beacon stations. FCC Rule \S 97.101 encourages amateur operators to cooperate in the selection of transmitting channels.
Therefore, to avoid interfering with this critical propagation tool, it is good amateur practice and a function of cooperation to normally avoid transmitting on these beacon frequencies. They are not formally set aside as ‘emergency’ or ‘bulletin’ frequencies, but they are reserved for the internationally coordinated beacon network.
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