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CV1021 / VR21 / 10E/7738 LF triode

Size This valve measures 100x40mm overall and has a 4 pin base.


Filament voltage 2.0V
Filament current 100mA
Max anode voltage 150V
Max anode dissipation 1.0W
Mutual conductance * 1.1mA/V
Amplification factor * 15

* At Va=100, Vg=0

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


Top quarter view



VR21 donated by Jan Heering

This file was last modified 23:10:12, Wednesday February 23, 2022