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The sound quality produced from "moving-iron" speakers used on such sets is sometimes described as torturous, although by the late 1920s the Kellogg-Rice dynamic (moving-coil) speaker had begun to find favor due to its superior sound-reproduction ability. Speakers widely used on TRF sets included: Moving iron speaker (horn or cone)
The Boy Scouts have kept the construction of a radio set in their program since the 1920s. A large number of prefabricated novelty items and simple kits could be found through the 1950s and 1960s, and many children with an interest in electronics built one. Building crystal radios was a craze in the 1920s, and again
Majestic radios from the Grigsby-Grunow halcyon era of the late 1920s–early 1930s have become antique radio collectors' items, prized for their craftmanship and appearance. [ 49 ] [ 50 ] Some models, such as the Art Deco -styled model 161 produced in 1933, have been fully restored.
English: A typical antique vacuum tube radio from the 1920s, with horn loudspeaker (right) and batteries to run it. The central unit is the Paragon Model RN-10 regenerative receiver made by Adams-Morgan Co. The unit on the left is a 3 tube audio amplifier unit, the Paragon DA-2 which provided the power to drive the loudspeaker. Up until the mid ...
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
The first Philco radios were introduced in mid-1928, and 96,000 were produced that year, making Philco radios 26th in the nation in production volume. [8] Up to that time most radios were handmade and priced for relatively wealthy consumers. Atwater Kent, the leading radio seller, coincidentally was also located in Philadelphia.
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The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.
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