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Updated: June 1, 2025
The operator glanced at the board, started to note the times and intensities of two of the dials in his log, scratched them out, then went on with his conversation with the audio controller. The younger reporter got up and came over to the board. The controller and the operator looked up at him. "Nothing," said the operator shaking his head in a negative. "Bad call at the ball game, probably."
"Professor Hemmingwell and I were down at the far end of the hangar. The men had just left for the day and we were planning the work for tomorrow." "Then what happened?" demanded Connel. "Wait, don't answer yet!" He stopped himself and turned to a Space Marine standing nearby. "You! Can you work an audio recorder?" "Yes, sir," replied the Marine.
Since the radio frequency transformer has no iron core the high frequency, or radio frequency oscillating currents, as they are called, surge through it and are not changed into low frequency, or audio frequency pulsating currents, until they flow through the detector.
Connect the lead that runs from the second post of variable condenser to the first post of the third rheostat, the second post of which is connected with one terminal of the second amplifying tube; then connect the first post of the rheostat with one end of the secondary coil of the second audio frequency transformer and the other end of this coil with the grid of the second amplifier tube.
Next shunt a potentiometer around the A battery and connect the third post, which connects with the sliding contact, to the negative or zinc pole of a B battery, then connect the positive or carbon pole of it to the negative or zinc pole of a second B battery and the positive or carbon pole of the latter with one end of the primary coil of the second audio frequency transformer and the other end of it to the plate of the first amplifying tube.
"You'll make a fine diplomat, Corbett," Strong laughed. "All right, sit down and I'll give it to you straight." They hastily took seats and waited for their skipper to begin. "You've been assigned as cadet observers on a mission to test the range of a new long-range audio transmitter." Strong paused, then added significantly, "The test is to take place in deep space."
The scientist gestured to Rick and Scotty. "We know that the source will not come up over our horizon until about one o'clock. When it does, we would appreciate your help in making audio recordings. Until then, you're on your own." "What'll we do?" Scotty asked. Rick looked at his watch. It was shortly after nine. "Why not go over to see the pyramids?
Mainwaring did so; but for the life of him could not help throwing a little comic spirit into the action, adding in an undertone that he wished to be heard. "Ah, my dear Sam, how glad I am that you did not bid me go farther. However, to proceed No, my dear Martha, ever since our most felicitous conjugation, I hardly know what the exemplary verb audio means. I could scarcely translate it.
By using a receiving set having a three step radio frequency and a three step audio frequency, that is, a set in which there are coupled three amplifying tubes with radio frequency transformers and three amplifying tubes with audio frequency transformers as described under the caption A Radio Frequency Transformer Receiving Set, you can use a loop aerial in your room thus getting around the difficulties if such there be in erecting an out-door aerial.
However, everything will depend on the scope of the phenomenon called media 'convergence' and a possible rise of production costs if we need to offer audio and video products to stay competitive.
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