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Technics (テクニクス, Tekunikusu) is a Japanese audio brand established by Matsushita Electric (now Panasonic) in 1965.Since 1965, Matsushita has produced a variety of HiFi and other audio products under the brand name, such as turntables, amplifiers, radio receivers, tape recorders, CD players, loudspeakers, and digital pianos.
Crystal radios receive amplitude modulated (AM) signals, although FM designs have been built. [20] [21] They can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. [22] A few receive shortwave bands, but strong signals are required.
Some Casio keyboards were integrated into other electronic audio equipment, including AM/FM radios and cassette decks. Casio keyboards from the 1980s and 1990s are occasionally used by ambitious sound designers who use circuit bending , a process in which a person rewires the circuitry in innovative ways in an attempt to increase functionality ...
They are much less common in areas with 240 mains power, as there were few common tubes built to operate at the high voltages required. BC (medium wave/"AM") only radios like the "All American 5" design, and later AM/FM radios with more tubes, and even televisions were built using the same idea, because of the simplicity and low cost possible.
Telefunken REN 904. A vacuum tube from 1930, used in early German radios. Telefunken alarm clock from c. 1995, designed by Philippe Starck A Telefunken RC 881 cassette, CD player, and radio Telefunken electric kettle from 2011 Telefunken Partner 200, radio receiver model produced 1976-1978 in Germany.
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.