CV101 "crystal valve" S-band mixer diode
This valve, actually a semiconductor diode, is designed to operate between 2500 and 6000 MHz.
Crystal valves were used in the mixers of radar receivers and were susceptible to burn-out caused by the high RF power of the transmitted pulse. It was for this reason that TR Cells were so vital in single-aerial operation, and also the reason for the development of thermionic diode mixers such as the CV58 and CV258.
(Note: Yes I know it is
a semiconductor, but as these crystal valves were so vital to radar and
many of my other unusual valves are for radar too, surely this deserves
to be an 'honorary valve'!)
This file was last modified
16:07:14, Thursday August 28, 2014