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CV303 variable-µ HF pentode

Size This valve measures 78x32mm overall and has an 8 pin base.


Heater voltage 6.3V
Heater current 200mA
Max anode voltage, Ia=0 550V
Max anode voltage 300V
Max cathode current 10mA
Max anode dissipation 2W
Max screen voltage, Ia<3mA 300V
Mutual conductance * 2.2mA/V
Internal resistance * 1.2M ohms
Max screen dissipation 300mW
Cag <0.002pF
Cae 6.4pF
Cg1e 5.5pF
Cg1h <0.004pF
*: At Va=250, Vg2=100, Vg1=-2.5, Ia=6.0mA


Pin Function
1 Heater
2 Anode
3 Screen grid
4 Suppressor grid and shield
5 n/c
6 Control grid
7 Cathode
8 Heater
Spigot Metal shell

This file was last modified 23:10:25, Wednesday February 23, 2022