Which of the following is NOT a valid reason for the use of amateur radio frequencies?

• A. Communication for personal interests
• B. Emergency communications to aid others
• C. Commercial broadcasting to the public
• D. Experimental radio communications

Answer: (C)

The choice indicating that commercial broadcasting to the public is not a valid reason for the use of amateur radio frequencies is correct because amateur radio is specifically designated for non-commercial activities. The primary purpose of amateur radio is to promote self-training, intercommunication, and technical investigations while providing a service to the community, especially during emergencies.

Every other option—communication for personal interests, emergency communications to aid others, and experimental radio communications—aligns with the guidelines outlined by the Federal Communications Commission (FCC). Personal interests can encompass hobbies, conversations with friends, or community engagement, while emergency communications illustrate amateur radio's crucial role in disaster response. Experimental communications allow operators to explore and innovate within the radio spectrum without commercial intent, complying with regulations that govern amateur radio use.

Thus, commercial broadcasting does not fit within the scope of amateur radio, which is reserved for personal, non-commercial use.