The CV2736 is a most unusual triode. The cylindrical anode is held at three points 120 degrees apart and is brought out to the top pin. The filament is at the centre of the anode cavity and its connections are taken to the base pins. The grid is a cage of vertical wires surrounding the filament and obscuring its structure. The grid is firmly held in place by the thick rod that protrudes through the envelope at right angles to the valve axis.
The KB/Q identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the Q identifies the maker as English Electric Valve Co., Chelmsford.
The grid connection on the right. The cage grid wires are held by a small cylinder top and bottom.
The base pins are fixed to a ceramic insert within the metal skirt.
Here the form of the lower cage grid support is clearly seen as is the helical thoriated tungsten filament within.
The wide glass tube envelope is 35 mm in diameter, and excluding the UX4 base pins is 95 mm tall.
References: Data-sheet. Type CV2736 was first introduced in 1945. See also1945 adverts.
