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CV8020 RF pentode

Size
This valve measures 50x17mm overall and has a B7G base

Data below from Z77. The CV Register lists Z77 and both CV138 and CV4014 as possible substitutes.

Heater voltage6.3V
Heater current300mA

(Refer to datasheet for Z77 for further information)

Pin Function
1Control grid
2Cathode
3Heater
4Heater
5Anode
6Suppressor grid
7Screen grid
CV8020