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CV3870 / 4064B mercury vapour rectifier

Size This valve measures 205x60mm overall and has a 4 pin base.

4064B is shown as a possible substitute for the 872A; however CV3870 is not. Data below is for the 4064B:

Filament voltage 5V
Filament current 6.75A
Max peak anode current 5A
Max PIV 10kV
Max average anode current 1.25A


Pin Function
2 Filament
4 Filament
TC Anode