Is simultaneous transmission of two or more HF radios possible on this aircraft?

• A. Yes
• B. No
• C. Only on Standby
• D. Not allowed

Answer: (B)

Simultaneous transmit on multiple HF radios isn’t possible because the HF system on this aircraft uses a single active transmit path that shares the same antenna. Transmitting on two different radios at once would cause signal collisions and impedance issues on the antenna, leading to interference, degraded communications, and potential equipment stress or damage. You can still monitor or receive on multiple frequencies, or switch the active transmitter to another radio, but both radios cannot transmit at the same time.