The CV6097 (commercially the A2792) is a shunt voltage stabiliser triode. The anode would connect to the HT rail and the cathode to ground. A sense circuit would monitor the output voltage and control the conduction through the triode. In this way the HT rail would be maintained at a near constant level. For high current application a series pass stabiliser would be used.
The KB/Z identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the Z identifies the maker as MO Valve Company, Hammersmith.
The GEC professional brand label.
The base shows the heater and central cathode tube.
The thin glass tube envelope is 20 mm in diameter, and excluding the base pins is 51 mm tall.
