Sensibly equivalent¶ to:
The CV2231 is a pulse modulator pentode based on the E2266. The non CV reference is an experimental valve believed to come from M-OV.
The design allows for a 15% duty cycle and a maximum pulse length of 15 μs. Under these conditions the peak anode voltage can rise to 10,000 Volts and the peak current is 2.5 A. In addition to an anode maximum dissipation of 12 Watts the screen grid can dissipate 3 Watts.
An additional function that the valve can be used for is as a shunt voltage regulator. In this application the maximum anode voltage is 6,000 Volts. Given the high cathode current of 120 mA and DC voltage of 600 Volts this valve could also be used as a series voltage regulator. See PL81 as another valve suitable for series pass duty.
The physical construction features ceramic insulators and radiator fins attached to the top of the grid. The anode is also blackened for enhanced radiation efficiency.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 69 mm tall.
References: Data-sheet & private communication.
Absolute Maximum Operating Conditions¶
Updated July 05, 2014. shape:thin.glass.tube construction:all.glass type:pentode base:b9a heater:6.3v pins:9 pin:1.ic pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.ic pin:7.ic pin:8.g2 pin:9.g3 pin:tc.a