radar
The Magnetron tube is quite different from the Klystron tube. The Magnetron tube is can only function as an oscillator only.
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radio waves
radar
A magnetron is a high-power, high frequency vacuum tube. The magnetron is the source of radio-frequency energy in RADAR systems and in the microwave oven in your kitchen, for example.
The cavity magnetron was used in RADAR during WW2 ~ see related link below .
250 rpm
radar
The working part of a microwave is a cavity magnetron. In essence it converts electricity into radiation of the microwave wavelength. The radiation then excites the atoms in the food and it becomes hot. The Cavity magnetron was also a vital invention in the history of radar, without it the Allies might have lost the second World War.
That depends on the particular radar system. A simple speed radar used by law enforcement can simply be held and pointed at a target to determine the speed of the target. A more complex system like an air traffic control radar system would have display consoles for the radar operator to view the data.
Accurate within 5 yards anywhere on earth
Aerostat radar is a low-level surveillance system that uses aerostats (moored balloons) as radar platforms.
A magnetron is a high power microwave oscillator, and it is used in microwave ovens and radar transmitters as well as some other applications. The magnetron itself is actually a special kind of vacuum tube - a vacuum diode - that incorporates some unique structural elements and has a permanent magnet included in its construction. This magnet is set up to affect the path of travel of electrons that are in transit from the cathode to the plate. Links are provided to relevant Wikipedia articles.
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radar
radar