11. The transmitters used Klystron power amplifiers and the receivers were cryogenically cooled maser devices. 12. Amplification was achieved by exciting a ruby comb with a 12.0 gigahertz klystron . 13. Where precise frequencies are needed, other devices, such as the klystron are used. 14. High-powered klystron amplifier tubes can provide hundreds of kilowatts in the UHF range. 15. The klystron was the first significantly powerful source of radio waves in the microwave range. 16. Some klystrons have cavities that are tunable. 17. The best known example is the klystron . 18. That combination of technology makes Klystron 9 the most powerful television radar in the world. 19. This required the development of klystron , the traveling wave tube, and solid state devices. 20. The gain of the IOT is 20 23 dB versus 35 40 dB for a klystron .
