The CV359 and CV360 are gas filled power indicator tubes based on the VX3039. The design use is to indicate peak power in an S-band waveguide. The CV360 is the more sensitive and carries the commercial designation NE18.
The green base cap indicates the CV359. The CV360 has a red base cap.
The KB/F identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the F identifies the maker as STC, Paignton.
The ITT name and the commercial Type designation of NE17.
The indicator and spring.
Thanks to Mark Mallison for sending the images.
The thin glass tube envelope is 5 mm in diameter, and including the base is 119 mm tall.
