The CV6131 (commercially the C1149/1) is a tetrode pulse amplifier designed for use as a radar modulator with a peak pulse output of 330 kW. The vibration resistant design was for marine radar use.
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 health and safety warning on the envelope.
The cage grid and circular cathode tube.
The base pins in a ceramic disc spaced from the glass so as to protect the evacuation pip.
The wide glass tube envelope is 76 mm in diameter, and excluding the B4A base pins is 141 mm tall.
