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This device has a cast metal horn which improves the quality of the sound, and all you have to do is to slip the headphones on the inlet tubes of the horn and it is ready for use. The two headphones not only give a longer volume of sound than where a single one is used but there is a certain blended quality which results from one phone smoothing out the imperfections of the other.
This done connect one terminal of the tickler coil which is on the rotor of the variometer to the plate of the detector and the other terminal of the tickler to the other post of the .001 condenser and around this shunt your headphones. A Long Wave Receiving Set.
But from each plastic helmet a six-inch antenna projected straight upward, and the microwaves of suit-talkies made a jumble of slightly metallic sounds in the headphones of each suit. As soon as Cochrane got out of the jeep's air-lock and was recognized, Dabney said agitatedly: "Mr. Cochrane! Mr. Cochrane! I have to discuss something with you! It is of the utmost importance!
When frantic bangings on the propped-shut door awakened him next morning, he confusedly imagined that they were noises in the communicator headphones, and until he heard his name called tried drearily to make sense of them. But suddenly he opened his eyes. Somebody banged on the door once more. A voice cried angrily: "Bron Hoddan! Wake up or I'll go away and let whatever happens to you happen!
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.
The clickings.... They roared. Joe pushed the button. He felt the tiny impact. "Once more," said the pilot. He swung in nearer where the dead man lay. Joe had a sickening idea of who the dead man might be. A sudden rush of noise in the headphones and he pushed the button again. "Reel in now!" shouted the pilot. "Our job's done." Joe reeled in as the plane winged steadily back toward the Shed.
This regenerative action of the battery current augments the original oscillations many times and hence produce sounds in the headphones that are many times greater than where the vacuum tube detector alone is used. Operation of Autodyne and Heterodyne Receiving Sets.
The ends of this magnet, which are called poles, are bent up, and hence this type is called a bipolar receiver. The magnets are wound with fine insulated wire as before and the diaphragm is held securely in place over them by screwing on the cap. About Resistance, Turns of Wire and Sensitivity of Headphones.
As the signal echoed in his blacked-out space helmet, Tom jerked his body around in a sudden violent move, and grasping the valve of the jet unit on his back, he opened it halfway. He waited, holding his breath, expecting to hear Captain Strong correct his course. He counted to ten slowly, and when no correction came over the headphones, he opened the valve wide and blindly shot through space.
Do so." His speaker clicked off. Baird said: "It's in our laps. Diane. And yet we have to follow orders. Send the first roll." Diane had a tape threaded into a transmitter. It began to unroll through a pickup head. She put on headphones. The tape began to transmit toward the Plumie.
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