A tunable, low-voltage reflex klystron for operation in the 50 to 60-kmc band

Electrical and mechanical techniques are described which have been successfully applied to the design of a reflex klystron operating in the 50,000 to 60,000-mc band. Not only have these techniques resulted in a practical tube operating at the highest frequency yet achieved with a gridded, low voltage reflex klystron, but they point the way to future work at still higher frequencies. The M1805 reflex klystron has a mechanical tuning range of over 10,000 mc and at a beam voltage of 600 volts delivers a maximum CW power of 15–30 milliwatts. Its electron-optical system resulted in a repeller mode exhibiting good symmetry and almost complete absence of electronic hystersis.