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CV4031 double triode

Size This valve measures 53x17mm overall and has a B7G base.

The prototype of this valve is the CV858.

Heater voltage 6.3V
Heater current 0.45A
Max operating anode voltage 330V
Max anode voltage (Ia=0) 550V
Max anode dissipation (per section) 1.6W
Max heater to cathode voltage +/-100V
Max cathode current 25mA
Max bulb temperature 165C
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g
Max operating frequency 250MHz
Mutual conductance (Va=100V; Vg-0V; Rk=50 ohms; Ia=9mA approx) 5.6mA/V
Anode impedance 6.3k ohm
Amplification factor 38


Pin Function
1 Anode 2
2 Anode 1
3 Heater
4 Heater
5 Grid 1
6 Grid 2
7 Cathode