A tuned radio frequency receiver (TRF receiver) is a radio receiver that is usually composed of several tuned radio frequency amplifiers followed by circuits to detect and amplify the audio signal. Prevalent in the early 20th century, it can be difficult to operate because each stage must be individually tuned to the station's frequency. It was replaced by the Superheterodyne receiver invented by Edwin Armstrong.
Read more about Tuned Radio Frequency Receiver: Background, How It Works, Disadvantages of TRF Receiver, Modern Usage
Famous quotes containing the words tuned, radio, frequency and/or receiver:
“Pitiless verse? A few words tuned
And tuned and tuned and tuned.
It is good.”
—Wallace Stevens (1879–1955)
“There was a girl who was running the traffic desk, and there was a woman who was on the overnight for radio as a producer, and my desk assistant was a woman. So when the world came to an end, we took over.”
—Marya McLaughlin, U.S. television newswoman. As quoted in Women in Television News, ch. 3, by Judith S. Gelfman (1976)
“One is apt to be discouraged by the frequency with which Mr. Hardy has persuaded himself that a macabre subject is a poem in itself; that, if there be enough of death and the tomb in one’s theme, it needs no translation into art, the bold statement of it being sufficient.”
—Rebecca West (1892–1983)
“Gifts must affect the receiver to the point of shock.”
—Walter Benjamin (1892–1940)