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CV3986 submin double triode

Size This valve measures 34x9mm overall and has a B8D base.


Heater voltage 6.3V
Heater current 300mA
Max operating anode voltage 165V
Max anode dissipation 0.7W
Max negative grid voltage -55V
Max peak anode current 22mA
Max peak grid current 5.5mA
Max heater-cathode voltage 200V
Max bulb temperature 220C
Typical operating conditions
Anode voltage 100V
Anode current 6.5mA
Mutual conductance 5.4mA/V
Amplification factor 35
Cag nom 1.5pF
Cin nom 2.4pF
Cout section 1 nom 0.28pF
Cout section 2 nom 0.32pF
Ca' a" max 0.52pF
Cg' g" max 0.013pF


Lead Function
1 Anode "
2 Grid "
3 Heater
4 Cathode "
5 Cathode '
6 Heater
7 Grid '
8 Anode '


This file was last modified 23:10:27, Wednesday February 23, 2022