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This 1920s TRF radio manufactured by Signal is constructed on a breadboard Tuning a TRF receiver, like this 5 tube Neutrodyne set from 1924 with two stages of RF amplification, was a complicated process. The three tuned circuits, controlled by the 3 large knobs, had to be tuned in unison to the new station.
Audio reproduction quality of TRF sets was limited by the available loudspeakers. "High Fidelity" was not to become a radio marketing concept until the mid-1930s and was not realized until the advent of FM broadcasting. Reaction sets, also known as regenerative receivers, rely on positive feedback to achieve adequate gain. This approach ...
The Neutrodyne radio receiver, invented in 1922 by Louis Hazeltine, was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized" [1] [2] to prevent parasitic oscillations which caused "squealing" or "howling" noises in the speakers of early radio sets.
Typically tradio and similar programs are only heard on small, rural stations; KDKA in Pittsburgh, Pennsylvania is the largest market with a tradio program, airing weekly on Saturday afternoons. A similarly-styled program titled Wheelin' and Dealin' with Dave Ramos also airs during the weekends on WTAM in Cleveland, Ohio (but is not in a ...
A suspect is in custody after a knife attack at Grand Central 42 Street subway station in New York injured two with neck and wrist slashes.
Elon Musk hit out at a Delaware judge's latest rejection of his mega pay package. The Tesla CEO described the ruling as "totally crazy" and "absolute corruption." Musk and Tesla supporters ...
The market has an assortment of vendors including produce, clothing, novelties, and antiques. The market has more than 1,600 vendors' spaces, 350 of which are covered; no admission fee; and more than 70 acres (280,000 m 2) of free parking. It is located off Ohio State Route 154, with access also available from Ohio State Route 7.
U.S. President-elect Donald Trump said "anything can happen" when asked about the chances of going to war with Iran during his next term in an interview with Time, coinciding with his being named ...