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The magic eye (also called a cat's eye, or tuning eye in North America) is a specific type of such a tube with a circular display similar to the EM34 illustrated. Its first broad application was as a tuning indicator in radio receivers , to give an indication of the relative strength of the received radio signal, to show when a radio station ...
Ye (Russian: Е) – Magic eye tube (e.g. used as a tuning indicator). U (Russian: У) – Power triode (was soon deprecated). The 3rd element is a number – a series designator that differentiates between different devices of the same type. The 4th element denotes vacuum tube construction (base, envelope):
Whereas Microsoft mice and Microsoft keyboards were previously controlled from two separate programs – IntelliPoint and IntelliType – the Mouse and Keyboard Center is responsible for both kinds of devices. 32- and 64-bit versions of the software are available, and the program integrates with Windows 8 and above's "Modern UI" interface.
Magic is an electronic design automation (EDA) layout tool for very-large-scale integration (VLSI) integrated circuit (IC) originally written by John Ousterhout and his graduate students at UC Berkeley. Work began on the project in February 1983.
Circuit symbol of a heptode. The development of the pentagrid or heptode (seven-electrode) valve was a novel development in the mixer story. The idea was to produce a single valve that not only mixed the oscillator signal and the received signal and produced its own oscillator signal at the same time but, importantly, did the mixing and the oscillating in different parts of the same valve.
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The tube is in the quiescent, "maintenance" state, with read plate active. Also shown, a 12AU7 tube for size comparison. In this respect, the Selectron works in the opposite sense of the Williams tube. In the Williams tube, the beam is continually scanning in a read/write cycle which is also used to regenerate data.
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