How should MF/HF transceiver power levels be set?

• A. To the lowest level necessary for effective communications
• B. To the maximum power for all transmissions
• C. At a fixed level for all channels
• D. Only when required by the operator

Answer: (A)

Set the power to the minimum level that still provides readable communication at the other end. This keeps transmissions efficient, reduces the chance of causing interference to other operators, and saves fuel and wear on the gear. Because MF/HF propagation and noise vary with distance, band conditions, and time, you start low and only increase power if the signal isn’t readable. Using maximum power all the time is unnecessary and can crowd the spectrum with loud signals, while fixed power for every channel ignores varying link requirements; you should adapt power to what’s needed to maintain a clear link.