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CV2020 RF pentode

Size This valve measures 46x22mm overall and has 8 tags.

This is a CV850 with tags welded to the pins intended to be mounted in a B7G solder-in holder.

The CV850 marking has been painted over and the box updated to match
CV850 marking painted over Box markings Box markings

Heater voltage 6.3V
Heater current 175mA
Max anode voltage 200V
Max anode dissipation 1.85W
Max cathode current 20mA
Max screen voltage 155V
Max screen dissipation 0.55W
Max heater-cathode voltage 100V
Mutual conductance * 5.0mA/V
Anode impedance * 340k ohms
Max operating frequency 400MHz
Capacitances (with close fitting metal can)
Cag1 max 0.020pF
Cae nom 3.0pF
Cge nom 3.9pF
*: At Va=Vg2=120V , Vg1=-2V


Tag Function
1 Control grid
2 Cathode and suppressor grid
3 Heater
4 Heater
5 Anode
6 Screen grid
7 Cathode and suppressor grid
An 8th tag connects to the metal spigot in the centre of the disc attached to the base pins.