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Broadcast receivers began to appear in the shops, either with headphones or large horn loudspeakers, but we never had one at home. In 1926 we moved to Athens, Greece, where I went to school. Strangely enough, as I found out later, that was the year when Norman also came to Athens for the first time.
Shunt the potentiometer around the A battery and connect the sliding contact with the or zinc pole of the B battery and the + or carbon pole with one terminal of the headphone; connect the other terminal to one of the posts of the variometer and the other post of the variometer to the plate of the detector. Finally shunt a .001 mfd. fixed condenser around the headphones.
There was also a headset, and something very much like a large aluminum fish on the end of the line. "You know Geiger counters?" called the pilot. "Stick on these headphones and listen!" Joe slipped on the headset. The pilot threw a switch and Joe heard clickings. They had no pattern and no fixed frequency.
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.
As these rising and falling currents act on the pulsating currents from the B battery which flow through the detector tube and the headphones you will hear them as beats.
Run the lead on over and connect it to one of the terminals of the second fixed condenser and the other terminal of this with the plate of the second amplifying tube. Then shunt the headphones around the condenser.
He faced his own eccentric vessel in the direction of its line of flight. Then his fuming suddenly ceased. Joe's headphones brought his explosive grunt when he suddenly saw the idea. "Joe! I wish you could talk Indian! I could kiss you for this trick!" Brown's voice said anxiously: "I'm going to let that manned rocket have a couple more shots." "Let us get by first," said Joe.
This is because oscillations are set up only when the plate is energized with the positive part of the alternating current and this produces an intermittent musical tone in the headphones. Hence this kind of a sending set is called a tone transmitter.
The hand and arm of a space-suited figure lifted, for attention. Dabney's voice came worriedly from the headphones of every suit: "I wish it understood," he said in some agitation, "that this first attempted application of my discovery is made with my consent, but that I am not aware of the mechanical details. As a scientist, my work has been in pure science.
How long would it be before the Law arrived to collect them? Would they have time to state their case? The faint hope that they might aroused him. He reached for the com key and a second later tore the headphones from his appalled ears.
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