RF fields are strongest close to transmitting antennas and high-power feed systems.

• Keep people away from transmitting antennas.
• Avoid touching antennas or exposed RF conductors during transmission.
• Use the lowest transmitter power needed for reliable communication.
• Position antennas away from frequently occupied areas.
• Evaluate RF exposure when using higher power or directional antennas.

Tube amplifiers and some power supplies may contain lethal voltage even after the equipment has been switched off.

• Disconnect mains power before opening equipment.
• Never assume capacitors are discharged.
• Follow manufacturer discharge procedures.
• Keep covers and interlocks properly installed.
• Do not bypass safety interlocks.
• Service high-voltage equipment only if you are competent to do so.

Tower work introduces fall, electrical and mechanical hazards.

• Never install antennas near overhead electrical power lines.
• Treat every overhead wire as energized.
• Use appropriate climbing and fall-protection equipment.
• Do not climb during rain, thunderstorms or strong winds.
• Use a helper or ground person during significant tower work.
• Inspect ropes, clamps, mast hardware and guy wires regularly.

Outdoor antennas can provide a path for lightning and static charge.

• Use proper station grounding and bonding.
• Install suitable coaxial surge protection where appropriate.
• Keep grounding conductors short and direct.
• Disconnect antennas when severe thunderstorms threaten, when safe to do so.
• Never handle antenna cables during an active thunderstorm.
• Follow local electrical and lightning-protection requirements.

Damaged coax, poor connectors and high SWR can create RF heating and equipment stress.

• Inspect coax cables for cuts, moisture and crushed sections.
• Ensure connectors are properly assembled and tightened.
• Use cable and connectors with adequate voltage and power ratings.
• Check SWR before prolonged high-power operation.
• Replace overheated, corroded or damaged connectors.

Maintain a clean, properly wired station with adequate ventilation.

• Keep transmitter and amplifier cooling vents unobstructed.
• Avoid loose power cables and exposed terminals.
• Use correctly rated fuses and circuit protection.
• Never replace a fuse with a larger value simply because it blows.
• Keep liquids away from radio equipment and mains power.
• Keep children and visitors away from hazardous station areas.