The CV35 is a tunable reflex klystron that has an International Octal base and was designed to operate as an oscillator at a wavelength of 10 cm (3 GHz) and replaced the NR89.
A range of Types existed to this design, varying only in frequency. These were the CV35, CV36 and CV69. These all operated with voltages above 1 kV and were a problem for airbourne use. The replacement design was the CV116, CV238 and CV272.
The serial number is G12593, the max voltage is 1320 and the ou35ut is 320 mW.
The CV35 etched into the envelope.
The heater and cathode assembly.
The repeller or reflector.
The wide glass tube envelope is 30 mm in diameter and, excluding the IO base pins, is 154 mm tall.
Reference: Datasheet. Type CV35 was first introduced in 1941.