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Updated: May 29, 2025
Thoughts beyond our knowledge have, of course, no meaning, even when our mental amplifiers get them, and bring them to us." "The Molecular ray!" gasped Morey in surprise. "They will be an enemy." "You know it! It is familiar to you! You have it? You can fight it?" asked Zezdon Afthen excitedly. "We know it, and can fight it, if that is all they have."
Of course there haven't been any newscasts since I've been here. All the power has been used for the Tracer. But it's easy enough to switch over. And all the other planet stations and systems stations are primarily just amplifiers and transmitters for this one." "If the broadcasts haven't been on the air, what about the receivers? Will anyone be listening if we put a speech on?" Astrid smiled.
As they traveled their detecting receivers and amplifiers were reaching out with their utmost power; ultra-instruments capable of rendering audible any signal originating within many light-years of them, upon any known frequency. And constantly at least two men were listening to those instruments with every sense concentrated in their ears.
The chief pilot brought both cross-hairs directly upon the brilliant point, which for some time they had been approaching more and more nearly, adjusted the photo-cells and amplifiers which would hold them immovably upon it, and at the calculated second of time, cut out the starting power by means of another set of automatically timed relays.
Of these, the largest was Fixed Communications, with its dial equipment, its banks of video amplifiers, the network of cables, and the substation equipment. It would take days to thoroughly check all their activities. But the office was the key to the entire operation. He could check their records, and get a clue to their efficiency. And he could question the section chief.
And he told more in detail how, seeing Koku cleaning and sweeping out the other telephone booth, he had thought of the trick to play on him. Both telephones had what are called "amplifiers" attached, that could be switched on when needed.
Very often he has to take his apparatus to some place he has never seen before, set up his amplifiers in most awkward positions, test his lines to the studio, decide on his microphone placings and run out the wiring in the space of an hour or so, with little previous experience to guide him. It is in fairly echoey halls, theatres and churches that the majority of outside broadcasts take place.
Where audio frequency transformers are used for stepping up the voltage of the current of the detector and amplifier tubes, the radio frequency current does not get into the plate circuit of the detector at all for the reason that the iron core of the transformer chokes them off, hence, the succeeding amplifiers operate at audio frequencies. A Six Step Amplifier Receiving Set With a Loop Aerial.
Where audio frequency transformers are used for stepping up the voltage of the current of the detector and amplifier tubes, the radio frequency current does not get into the plate circuit of the detector at all for the reason that the iron core of the transformer chokes them off, hence, the succeeding amplifiers operate at audio frequencies. A Six Step Amplifier Receiving Set With a Loop Aerial.
He spoke into a telephone transmitter and his words were clearly heard by all in the audience, by means of amplifiers. At the same time a part of the electrical current from the amplifier, representing the sentence he voiced, was stored in a "delay circuit," another recent invention of the laboratories.
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