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VT81 triode

Size This valve measures 108x40mm overall and has a B4 base.

This is a GPO specification directly heated triode valve.

Filament current 250mA
Nominal filament voltage 4V
Max anode voltage 160V
Max anode dissipation 2.5W
Anode impedance * 5500 ohms
Amplification factor * 12
Cag (nominal) 9.6pF
Cae (nominal) 4.3pF
Cge (nominal) 8.1pF

*: At Va=130, Vg=-4.5

Pin Function
1 Anode
2 Grid
3 Filament -ve
4 Filament +ve

This file was last modified 14:59:35, Tuesday September 02, 2014