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A magic tee (or magic T or hybrid tee) is a hybrid or 3 dB coupler used in microwave systems. [1] It is an alternative to the rat-race coupler . In contrast to the rat-race, the three-dimensional structure of the magic tee makes it less readily constructed in planar technologies such as microstrip or stripline .
A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to rotate and produce thermal energy (heat) in a process known as dielectric heating .
Linn was founded by Ivor Tiefenbrun to produce the Sondek LP12 turntable. The company's logo is the simple geometric representation of the 'single point' bearing which was the unique selling point of the LP12 turntable. Hamish Robertson designed the Ariston RD11 in 1971 with Castle Precision Engineering Ltd machining many of the parts.
Rat-race couplers are used to sum two in-phase combined signals with essentially no loss or to equally split an input signal with no resultant phase difference between its outputs. It is also possible to configure the coupler as a 180 degree phase-shifted output divider or to sum two 180 degree phase-shifted combined signals with almost no loss.
In 1881, Tappan appliances was founded by W.J. Tappan as the Ohio Valley Foundry Company in Bellaire, Ohio, initially selling cast-iron stoves door-to-door. [ citation needed ] In 1889, the company relocated to Mansfield, Ohio , and was renamed the Eclipse Stove Company , when Tappan's father, who was an amateur astronomer, suggested the name ...
Goldring moved to England in 1933. In 1954, the company released 500 British-made magnetic cartridges; the 600 and 700 models followed in 1958 and 1960, respectively. The 1970s saw the release of the Lenco GL85 turntable (1973) and of the 900SE II and 900/E cartridges. In 1987, Goldring was sold to Veda-UK (Armour Home Electronics).
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