Virtual Valve Museum

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CV4057 reliable high voltage halfwave rectifier

This valve measures 54x17mm overall and has a B7G base.

This valve was developed from CV371. The equivalent flying lead valve is CV4042.

Heater voltage 4V
Heater current 0.5A
Max operating anode voltage 2kV
Max working PIV 5kV
Max no-load PIV 6kV
Max DC output current 30mA
Max peak anode current 180mA
Max heater/cathode voltage 10V
Max reservoir capacitor 1.1µF
Max limiting impedance 4500 ohm
Min HT switching delay period for full rating 20 secs
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g


Pin Function
1 i/c
2 Cathode
3 Heater
4 Heater
5 i/c
6 i/c
7 i/c
TC Anode