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VR37 / NR31 / 10E/9598 triode

Size This valve measures 115x43mm overall and has a B5 base.

Note: the data sheet for this valve shows NR31 as metallised, but this example is not.

Heater voltage 4V
Heater current 1A
Max anode voltage 250V
Max anode dissipation 2.5W
Anode impedance * 11,500 ohms
Mutual conductance * 3.6mA/V
Amplification factor * 40

*: At Va=100, Vg=0

Pin Function
1 Anode
2 Grid
3 Heater
4 Heater
5 Cathode
NR31
VR37 / 10E/9598

This file was last modified 15:54:38, Saturday November 12, 2011