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VEF Spidola (Latvian: VEF Spīdola, Russian: ВЭФ Спидола) was the first mass-produced transistor radio with short wave band in the Soviet Union (tube short wave receivers were produced for many years before). It was manufactured by the VEF factory in Riga, Latvia, since 1962.
Following the October Revolution control over radio resources was given to the People's Commissariat for Posts and Telegraphs. Then, in 1924 it was transferred to a joint-stock company whose members were the Russian Telegraph Agency, a major electric factory, and the PCPT,10 but in 1928 was returned to the People's Commissariat for Posts and Telegraphs.
A seven-transistor Soviet Orljonok radio with the back open, showing parts.. Before the transistor was invented, radios used vacuum tubes.Although portable vacuum tube radios were produced, they were typically bulky and heavy.
Radio receiver was produced in two versions, with audio power amplifier on four or five transistors. The second version of the audio power amplifier uses an additional КТ315Б transistor to stabilize the output stage mode. [3] Known colors - black, white, blue, yellow, green, red, brown, burgundy.
The receiver was developed in the design bureau of the Aleksandrovsky radio factory in 1949 under the direction of V. M. Khakharev and M. E. Movshovich using the R-253 "Alfa" (Р-253 «Альфа») receiver as a basis for the design. Serial production began in 1954, and it was adopted by the Soviet military in 1956.
It also manufactured highly demanded transistor-based radios "Spīdola" and in the 1970s — "VEF". [ 2 ] During the Soviet period, VEF specialized in electronics and was a part of Latvia's electronic industry, which supplied the former Soviet Union with telecommunications equipment and electronics for the military.
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.
A-7a is a simplified version of the A-7. The total number of valves was reduced to 9. In the transmitter section, the functions of the modulator and power amplifier were combined into one valve, and in the receiver section one valve was used to simultaneously perform the functions of a high-frequency and low-frequency amplifier (the so-called reflex circuit).