United States or Macao ? Vote for the TOP Country of the Week !
"Attention, Mainwaring; my Beck's excepted." "Martha, the best of wives old Sam's Beck always excepted sitting at my side. As for audio, the truth is, I have been forced to experience the din and racket of that same verb during the greater portion of my life, in more senses than I am willing to describe.
Where a six step amplifier, that is, where six amplifying tubes are connected together, or in cascade, the first three are usually coupled up with radio frequency transformers and the last three with audio frequency transformers. A radio frequency transformer is shown at B and costs $6 to $7. An Audio Frequency Transformer Amplifying Receiving Set.
Where either a radio frequency transformer, that is one without the iron core, or an audio frequency transformer, that is one with the iron core, is used to couple the amplifier tube circuits together better results are obtained than where a high resistance grid leak is used, but the amplifying tubes have to be more carefully shielded from each other or they will react and set up a howling noise in the head phones.
Roger was standing at the chart table, audiophones on his ears, listening for the automatic astral chronometer time-check broadcast on a suprahigh-frequency audio channel from the giant electronic clock in the Tower of Galileo.
"Stand by for maneuvering, Astro, and reduce your main drive thrust to minimum space speed." "Space station traffic control to rocket cruiser Polaris. Come in, Polaris. This is traffic control on space station to Polaris," the audio teleceiver crackled. "Rocket cruiser Polaris to space station and traffic control. Request touchdown permission and landing-port number," replied Tom.
But Alan was not registered on the televector screens and there was no other way of linking him with the crime. He glanced around the apartment at Hawkes' bar and his audio system and all the dead man's other things. Yesterday, Alan thought, Hawkes had been here, alive, eyes sparkling as he outlined the plans for the robbery a final time. Now he was dead.
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.
It was a hunting knife and he was not a hunter. The light at the end of the second row was growing gradually brighter. The needle traveled slowly across the dial, 68.2, 68.4, 68.6.... King called over to the audio controller. "They all report in yet?" The controller nodded. "Squirrel Hill's got your signal on, same reading as you have. Bloomfield thinks they may have it. Oakland's not too sure.
And then, as the last of their packing was completed and they were ready to call it a day, the phone buzzed. Cameron hesitated, determined to let it go unanswered, then punched the button irritably on audio only. Instead of the caller, he heard the voice of the operator. "One moment please. Interstellar, Transpace, printed. Please connect visio." It was like a shock, he thought afterwards.
Where radio frequency or audio frequency amplifiers are used to couple your amplifier tubes in cascade you must take particular pains to shield them from one another in order to prevent the feed back of the currents through them, which makes the head phones or loud speaker howl.
Word Of The Day