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An early 2000s transistor radio (Sony Walkman SRF-S84 transistor radio, released 2001, shown without earphones) Rock 'n roll music became popular at the same time as transistor radios. Parents found that purchasing a small transistor radio was a way for children to listen to their music without using the family tube radio.
A small series under the name "Spidola" (Спидола ПМП-60 [1]) had been manufactured since 1960. [2] [3] It was named after the fictional witch Spīdola from the Latvian epic poem. The word "spidola" was a genericised trademark for "transistor radio" for a long time in Russian [4] (other synonyms included "transistor").
The Sony TR-63, released in 1957, was the first mass-produced transistor radio, leading to the widespread adoption of transistor radios. [45] Seven million TR-63s were sold worldwide by the mid-1960s. [46] Sony's success with transistor radios led to transistors replacing vacuum tubes as the dominant electronic technology in the late 1950s. [47]
In the 1960s, company best seller products became transistor radio receivers. One of the most famous was the Koliber model. In 1969, three- band receiver models were available ( Dominika and Izabella ), as previous radios could only receive two bands, low frequency and medium wave , and a year later the Laura 4-band receiver came into production.
The TR-1 is a superheterodyne receiver [2] [11] with four n-p-n germanium transistors and one diode. It contains a single transistor converter stage, followed by two intermediate-frequency amplifier stages. After detection, a single-transistor stage amplifies the audio frequency. All amplifier stages use common emitter amplifiers. Stages are ...
The Regency TR-1, which used Texas Instruments' NPN transistors, was the world's first commercially produced transistor radio in 1954. Size: 3×5×1.25 inch (7.6×12.7×3.2 cm) Following development of transistor technology, bipolar junction transistors led to the development of the transistor radio.
In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave ...
Their first product was a vacuum tube radio released in 1955, [3] [4] and their first transistor radio was the KR-6TS-1 radio released in the spring of 1957 [5] [6] at the price of 14,000 yen. [7] Through the 1960s, Koyo had manufactured and sold millions of portable transistor radios, particularly, their best-selling model KTR-624 had been ...