Fleming worked out details about how to amplify power to provide a spark intense enough to create waves capable of jumping the Atlantic, and how to do so safely, for with so much voltage coursing through the system even the act of keying a message could prove lethal. No ordinary Morse key could handle the power. This key would be a lever requiring muscle to operate, and courage as well, especially when sending Morse dashes—which required longer pulses of energy and increased the threat that uncontrolled sparks, or arcs, would be unleashed.
