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Updated: May 28, 2025
A loud speaker when connected with a wireless receiving set makes it possible for a room, or an auditorium, full of people, or an outdoor crowd, to hear what is being sent out by a distant station instead of being limited to a few persons listening-in with headphones.
A loud speaker when connected with a wireless receiving set makes it possible for a room, or an auditorium, full of people, or an outdoor crowd, to hear what is being sent out by a distant station instead of being limited to a few persons listening-in with headphones.
When listening-in to distant stations the energy of the received wireless waves is often so very feeble that in order to hear distinctly an amplifier must be used.
"Say, 'Bill Howard', don't try to play the innocent to a fellow who's been listening-in to your unconscious confessions ever since you began to talk in your sleep," Hal scoffed with well simulated disgust. "I know well enough who you are. You're one of the sophomores of Edward's College who hazed Alvin Baker by marooning him on that island where his cousin shot you with a slingshot."
Cub was listening-in and read this message to his father. "That means we can go on nearly three hours yet before we have to seek a post for the night," the latter announced. "Good!" exclaimed Cub. "Now I'm going to test that radio compass and see what may be expected of it in the morning if we don't find Mr. Crusoe to-night, which isn't very likely."
Bud and Hal were both still listening-in, but with little suggestion of expectancy on their countenances. "Anything more?" inquired the tall youth, unwilling to put his question in negative form, in spite of the fact that his better judgment would have dictated it thus. Both listeners shook their heads. "Then that's the end of our search," Cub declared with a crestfallen and disgusted look.
Perry had just announced that the next number on the program would be "everybody to bed at once", and there was no more listening-in before the next morning. Max stayed up late that night, with phones to his ears, eager to get another message from the island, and he was a very much disappointed enthusiast when at last he gave up his efforts, convinced that they were useless.
So Curlie sat there surrounded by wire-wrapped frames, coils, keys, buttons, switches, motors, dry-cells, storage batteries and all the odds and ends which made up the equipment of the most perfect listening-in station in the world. As he sat there with Joe Marion, his pal, by his side, his brow was wrinkled in thought. He was reviewing the events of the previous night.
"Where is he?" asked Cub and Bud in chorus. Hal was at the table and the other two boys were listening-in. "I don't know," replied the operator. "One of you boys go on deck and see what you can see." Cub dashed up the companionway two steps at a time. In a few moments he returned with the announcement: "There's an open stretch of four hundred yards ahead of us.
The boys took regular turns at the radio table in the cabin that afternoon and found the occupation of listening-in much more interesting than it had been at their homes, not because of any particular difference in the messages, but because of the more romantic character of their new motives and surroundings.
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