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CV409 / A1820 video amplifier tetrode

Size This valve measures 82x36mm overall and has a B8G base.


Heater voltage 6.3V
Heater current 950mA
Max anode voltage 300V
Max screen voltage 300V
Max anode dissipation 10W
Max screen dissipation 2W
Mutual conductance (Va=Vg2=250) 10.5mA/V
Cae 8.5pF
Cge 12.0pF
Cag 0.05pF


Pin Function
1 Heater
2 Anode
3 Screen grid
4 Screen
5 Screen
6 Control grid
7 Cathode
8 Heater

This file was last modified 23:10:29, Wednesday February 23, 2022