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VT20 / 10E/7813 triode

Size This valve measures 97x40mm overall and has a B4 base.


Filament voltage 2V
Filament current 200mA
Max anode voltage 150V
Mutual conductance (A) 2.25mA/V
Anode impedance (A) 4k ohms
Amplification factor (A) 9
Average anode current (B) 11µA
Optimum load (B) 9k ohms

(A) at Va=100, Vg=0

(B) at Va=150, Vg=-7.5

Pin Function
1 Anode
2 Grid
3 Filament
4 Filament

This file was last modified 15:38:22, Tuesday September 02, 2014