The STC CV2516 is also marked as the commercial 2C39A and is a planar design of disc seal construction. This UHF triode was designed for use in a co-axial cavity with forced air or water cooling.
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 labelling of the valve is on the anodised aluminium cooling fins.
The very small gap between the long copper anode and the grid mesh is visible on the right of the glass.
The copper grid disc showing the fine wires.
The planar envelope is 32 mm in diameter and 66 mm tall.
