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CV1941 / NR81 pentode

Size This valve measures 112x36mm overall and has an octal base.


Heater voltage 6.3V
Heater current 300mA
Max anode voltage 300V
Max screen voltage 125V
Max anode dissipation 2.75W
Max screen dissipation 0.34W
Mutual conductance * 1.45mA/V
Anode impedance * 800k ohms
Anode current * 7mA
Screen current * 1.7mA

*: At Va=250, Vg2=100, Vg1=-3

Pin Function
1 n/c
2 Heater
3 Anode
4 Screen grid
5 Suppressor grid
6 no pin
7 Heater
8 Cathode
TC Control grid


This file was last modified 23:10:18, Wednesday February 23, 2022