Graves said nervously:
"I think I see. You are trying to make this communicator react as Betsy did. When it does, you will consider that your generator is creating a wave like the broadcasts from nowhere."
"Yeah," said Bellews. "It ain't scientific, but it's the best I can do."
He worked the generator-controls with infinite care. Once the communicator's standby light approached sine-wave modulation. He hastily shifted away from the settings which caused it. He muttered:
"Close!"
Then, suddenly, the communicator's lamp began to waver in an extraordinary, hysterical fashion. Sergeant Bellews turned down the volume swiftly. He wiped sweat off his forehead.
"I—I think I got the trick," he said heavily. "It's a hell of a wave-type! Are you guys game to feed it into this communicator's output amplifier?"
"I have six sets of cold chills running up and down my spine," said Lecky. "I think you should proceed."
Howell said angrily:
"It's got to be tried, hasn't it?"