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CV229 high mu triode for use in proximity fuzes

 

Size This valve measures 30x10mm overall and has a 4 lead base

 

Filament voltage1.5V
Filament current150mA
Max anode voltage100V
Mutual conductance *0.8mA/V
Amplification factor *32
Anode impedance *40kΩ

*: At Va=100, Vg=0

The leads are as follows: red spot, anode, filament +ve, filament -ve, grid.

Fuze valves had a very short operational life. The EVS sheet for the CV229 states that the valves are required for use in receivers and for short period of operation. There is no requirement to replace them or for them to have a normal lifespan. They need a long life in storage.

 CV229