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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 ...
Toronto is a city in eastern Jefferson County, Ohio, located along the Ohio River 6 miles (9.7 km) northeast of Steubenville. The population was 5,303 at the time of the 2020 census , making it the second-largest city in Jefferson County. [ 4 ]
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Outraged customers objected, and the Rochester city council revoked the company's franchise. In addition, telephone users staged a strike, removing their receivers at noon on November 20, 1886, and leaving them off the hook for 18 months while the company stood fast. Finally, Bell gave way, offering lower rates, and the strike was ended.
Struthers is located on the banks of the Mahoning River about 4 miles (6.4 km) west of the border between Ohio and Pennsylvania at the intersection of Ohio State Route 616 and Ohio State Route 289. The larger part of the city is across the river from State Route 289 on the south side of the river.
Warren is a city in and the county seat of Trumbull County, Ohio, United States. [3] Located along the Mahoning River, Warren lies approximately 14 miles (23 km) northwest of Youngstown and 56 miles (90 km) southeast of Cleveland.