Designed by Neil Summerour, 13 fonts, starting at $25

They invented a valve that could produce multi-kilowatt pulses at 10 cm wavelength
The high power of pulses from the device made centimeter-band radar practical for the Allies
The compact cavity magnetron tube drastically reduced the size of radar sets to be installed
Yoji Ito was experimenting with magnetrons in Japan, and proposed a system of collision avoidance
Back in Japan, he produced a prototype pulse magnetron with 2 kW output in October 1941
In the post-war era the magnetron was less widely used for radar applications
The idea of using a grid for control was patented by Lee de Forest
One concept used a magnetic field instead of an electrical charge to control current flow
At very high magnetic field settings the electrons are forced back onto the cathode

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