For best protection from electrical shock, all station equipment should be grounded in an amateur station.
An antenna system can best be protected from lightning damage by grounding all antennas when they are not in use.
Amateur station equipment can best be protected from lightning damage by disconnecting all equipment from the power lines and antenna cables.
An interlock switch in a high-voltage power supply that turns off the power if its cabinet is opened, is used to keep anyone opening the cabinet from getting shocked by dangerous high voltages.
If you are on the ground helping someone work on an antenna tower you should wear a hard hat and safety glasses to protect your head from something dropped from the tower.
When installing your antenna always be sure your antenna and feed line are well clear of any power lines.
There are many safety factors you should consider when using a bow and arrow or slingshot and weight to shoot an antenna-support line over a tree -- you should ensure that (A) the line is strong enough to withstand the shock of shooting the weight, (B) that the arrow or weight has a safe flight path if the line breaks, and (C) that the bow and arrow or slingshot is in good working condition. All of these factors should be checked.
A dummy antenna is used in place of an antenna during transmitter tests so that no signal is radiated for off-the-air transmitter testing.
A dummy antenna should have a minimum 100 watts continuous rating for use with a 100 watt single-sideband phone transmitter.
A 100 watt light bulb will not make a good dummy load for tuning a transceiver because the impedance of the light bulb changes as the filament gets hot.