Page:The Wireless Operator with the U.S. Coast Guard.djvu/100

 current up to eight thousand volts. A green operator doesn’t understand the rheostats, and would allow too great a voltage to pass through the generator. That would burn out the transformer or puncture the condensers or break down the insulation in the spark-gap, according to which was the weakest. We usually carry spare condensers and spare jackets for the spark-gap, but no spare transformer. It’s a mighty serious thing to burn out a wireless set. If anything happened to the ship, there would be no way to call help, and the entire crew might, consequently, be lost.”

During the chief radio man’s entire watch of four hours, Henry sat with him in the radio shack. After the examination was ended, Mr. Sharp connected up with the loud speaker of the radio, and the two watchers laid down their head-phones. They could talk freely. The loud speaker would tell them of every message in their wave-length that passed their way. To Henry this was, indeed, a rare opportunity. Again and again he went over every detail of the wireless apparatus, until he could have reconstructed the intricate outfit alone, had it been taken to pieces. And he asked the chief electrician countless questions as to wireless practice. With the wide knowledge he already possessed, he was in a position to learn much in a short time. When